Conventional Grinding Research Articles

A new method for machining RB-SiC with high efficiency and quality: Laser assisted ultrasonic grinding

Reaction Bonded Silicon carbide (RB-SiC) ceramic is preferred material for space mirrors in aerospace field. However, the high hardness, brittleness and inhomogeneous structure bring great challenges for high quality and efficient machining. In this study, laser ablation assisted ultrasonic grinding (LAAUG) process was proposed. The high efficiency of laser ablation and high quality of ultrasonic grinding were effectively combined. Laser pre-ablation experiments were carried out firstly, and then thermal damage layer was removed through ultrasonic grinding. The results show that RB-SiC ceramics transform into relatively loose and homogeneous ablation products (SiO2 and recrystallized SiC) by laser irradiation. Moreover, it is accompanied by cracks development. Compared with conventional grinding, the maximum reduction of grinding force and surface roughness is 34 % and 13.8 %, respectively. Abrasive grain wear is significantly restrained and the percentage of plasticity removal is improved. This study indicates that LAAUG is feasible and efficient method for machining RB-SiC ceramics.

Longitudinal-torsional compound ultrasonic vibration end grinding sapphire: A study on surface topography and roughness

Owing to excellent physical and optical characteristics, Sapphire has wide applications in detection, military, photoelectric and other industries. Nevertheless, it's difficult to use the conventional processing methods to process sapphire with high precision and efficiency due to its hardness and brittleness. This study adopted longitudinal-torsional compound ultrasonic vibration end grinding (LTUEG) method to grind sapphire. Firstly, the grinding trajectory equation of single grain under LTUEG was established. Then, combining with the motion state of single grain, the removal mechanism of sapphire under LTUEG was clarified. Finally, a comparative experiment between LTUEG and conventional end grinding (CEG) of sapphire was conducted, and the effects of processing parameters on surface topography and surface roughness were investigated. Results showed that surface roughness declined with grinding speed, enhanced with feed rate and grinding depth, declined first and then went up with amplitude, and the minimum value was 0.522 μm. Compared with CEG, LTUEG could significantly reduce the surface roughness, with a maximum reduction of 20.98 %. LTUEG could reduce the pits size. Meanwhile, when the longitudinal amplitude AL was 0.8 μm, the average pits length and pits depth reached the minimum, which were 33.13 μm and 5.296 μm, respectively. The research found that LTUEG could reduce block spalling, increase the ratio of plastic domain removal as well as improve the surface flatness of workpiece.

Research on the machining mechanism of AISI 304 ultrasonic vibration assisted grinding

Compared with conventional grinding (CG), ultrasonic vibration assisted grinding (UVAG) has more prospects and competitiveness in processing AISI 304. Due to the change of strength of materials, when the vibration is superimposed on the workpiece, the mechanism of ultrasonic assisted machining is different from that of tool ultrasonic assisted machining. Therefore, this article proposes a workpiece vibration grinding device suitable for UVAG to study the corresponding grinding mechanism. The vibration characteristics of workpiece ultrasonic generator were discussed based on finite element simulation and the vibration situation of the device was tested with instruments to verify the accuracy of the simulation. Meanwhile, the machining mechanism of workpiece ultrasonic vibration was studied through grinding comparative experiments. The experiment showed that the displacement curve of the output end of the ultrasonic vibration of AISI 304 with time could be approximated to a sine wave and there was no other clutter. As the amplitude percentage of the ultrasonic generator increased, the output amplitude of the transducer showed an increasing trend. The ultrasonic amplitude and the amplitude percentage of ultrasonic generator approximately follow a linear relationship. The grinding force decreased with the increase of spindle speed and amplitude, and increased with the increase of feed rate and grinding depth. Compared with conventional grinding force, the grinding force of tangential ultrasonic vibration assisted grinding (TUVAG) decreased by about 29 %, while the grinding force of radial ultrasonic vibration assisted grinding (RUVAG) decreased by about 28 %. Under the action of ultrasound, the workpiece obtained better surface morphology. Under processing conditions of vw = 25 mm/min, ap = 0.01 mm, n = 2000r/min, A = 8 μm, f = 20000 Hz, the minimum surface roughness Ra of TUVAG is 0.51, followed by RUVAG with Ra = 1.02, while the surface roughness Ra of CG is the worst at 1.56 due to grinding burns.

Laser-assisted grinding of RB-SiC composites: Laser ablation behavior and mechanism

Laser ablation is an important process during Laser-Assisted Grinding (LAG) of hard and brittle materials. To realize controllable material removal during laser ablation of RB-SiC composites, ablation experiments under different Laser Energy Density (LAED) and LAG experiments are conducted. Evolution rules and mechanism of physical phase, ablation morphology and crack characteristics caused by laser irradiation are investigated. The forces of LAG and Conventional Grinding (CG) are compared. The results show that ablation surface changes from slight oxidation to obvious material removal with LAED increasing, and ablation depth increases gradually. The ablation products change from submicron SiO2 particles to nanoscale particles and floccule. High LAED promotes SiC decomposition and sublimation, which leads to the increase of C element. The SiC phase forms corrugated shape in recast layer and columnar shape in Heat Affected Zone (HAZ) at 56 J/mm2. The cold and heat cycle leads to formation of fishbone crack. For ablation specimen under 30 J/mm2, the grinding force can be reduced by a maximum of 39% and brittle damage region is reduced. The material removal and microcrack generated will significantly reduce the hardness and improve machinability, which can promote grinding efficiency.

Residual Stress Evaluation on Surface Grinding of Maraging 350 Steel with Conventional Sol-Gel Grinding Wheel

Residual Stress Evaluation on Surface Grinding of Maraging 350 Steel with Conventional Sol-Gel Grinding Wheel

Experimental Investigation of Ultrasonic Vibration-Assisted Grinding of HVOF-Sprayed WC-10Co-4Cr Coating

WC-10Co-4Cr coating is highly valued for its corrosion resistance and wear resistance when applied using the high-velocity oxy-fuel (HVOF) spraying method. However, conventional grinding (CG) of this coating presents challenges, including substantial grinding forces and elevated surface temperatures. To address these concerns, our study proposed the utilization of ultrasonic vibration-assisted grinding (UVAG) as a means to enhance the machining properties of HVOF-sprayed WC-10Co-4Cr coatings. Comparative experiments were conducted to analyze the impacts of various factors on the grinding forces and surface roughness in UVAG and CG processes. Additionally, the topography of the ground surfaces was examined to gain insights into the material removal mechanism in UVAG. The experimental outcomes reveal significant reductions in tangential and normal grinding forces, amounting to 15.47% and 22.23%, respectively, in UVAG when compared with CG. Furthermore, UVAG led to a roughly 29.14% decrease in ground surface roughness compared with CG. Microscopic analysis of the ground surfaces using scanning electron microscopy (SEM) indicated that ductile removal was the predominant material removal mode in UVAG. Overall, UVAG was found to be effective in diminishing grinding forces, improving ground surface roughness, and enhancing surface integrity when contrasted with CG. These findings introduce a novel approach for processing WC-10Co-4Cr coatings.

Anisotropic material removal in ultra-precision grinding of rounded diamond cutting tools

Rounded diamond cutting tools are extensively utilized in ultra-precision cutting applications. However, the anisotropic nature of diamond crystals poses challenges in achieving uniform and controllable material removal using conventional mechanical grinding techniques, impeding further improvements in the precision of diamond tools. This study introduces a novel approach that leverages the diamond dynamic micro tensile strength theory to establish a grinding factor prediction model for any position on the flank face of the tool, considering the combination of R(100)F(100) and R(110)F(100) crystal faces. Experimental investigations are conducted to examine the relationship between the model and the tool's material removal rate. The findings reveal pronounced anisotropy on the flank of the diamond tool during mechanical grinding, and the modified grinding factor model exhibits excellent agreement with the observed change in the material removal rate. These outcomes provide valuable insights for enhancing precision in diamond tool fabrication and advancing ultra-precision cutting techniques.

Comprehensive investigation into grinding characteristics and damage behavior of Cf/SiC composite modified by picosecond-laser ablating

Cf/SiC composite is known as difficult-to-machine materials. This study introduced laser-ablating assisted grinding (LAAG) method, and explored the relationship between processing parameters and surface/subsurface damage behavior of Cf/SiC composite. It was revealed that SiO2 ablation products with a loose structure were formed during picosecond-laser ablating, and the ablated layers showed excellent machinability during grinding. Cf/SiC composite underwent brittle removal during conventional grinding (CG); however, significant ductile fracture and smeared removal appearance were clearly observed on the ground surfaces during LAAG. As the grinding speed increased, the grinding forces during LAAG were further decreased, and the brittle-ductile transformation of the normal fiber became more significant. The increase of feed speed would increase the grinding forces and enhance the brittle removal behavior of Cf/SiC composite. The laser power affected the machined quality through the ablation depth and the ablative transformation, and a smaller laser scanning distance would result in a flatter ground surface. Furthermore, subsurface damage of Cf/SiC composite after LAAG was slight, which primarily displayed as interface debonding and SiC matrix cracking. The grinding chips generated during LAAG were primarily composed of cut fiber-bundle and curled SiC matrix, rather than macro-fractured fiber and matrix with unordered size and shape.

Acoustic roughness outcomes from rail maintenance processes

Rail roughness is a key determinant of the rolling noise emissions of many railway systems, particularly those systems where wheel roughness is relatively low. Rail roughness can vary considerably. The noise emissions from trains operating on very smooth, quiet, worn in systems can be 25 dBA less than the noise from identical trains operating on the same trackform but with rough or corrugated rails. Rail roughness varies over time, with changes resulting from gradual wear during normal operations but also from maintenance interventions. Rail grinding, milling or acoustic polishing can cause immediate and sometimes dramatic changes in rail acoustic surface condition, and noticeable changes in noise character. This paper documents the acoustic roughness outcomes achieved by various rail maintenance processes, in comparison to acoustic roughness from worn in tracks. The data presented includes measurements of surface finish from conventional rail grinding, rail milling, and from newer specialist acoustic grinding technologies. The rail roughness results are used to demonstrate the differences in noise emissions following rail maintenance activities. The results confirm the importance of maintaining low rail roughness as a means of noise control at source.

An Experimental Investigation of the Effects of Dressing and Grinding Parameters on Sustainable Grinding of Inconel 738 Used for Automated Manufacturing

The significant effect of the dressing process on the surface of the grinding wheel (GW) and the need to provide an optimal dressing condition are the requirements of reduction machining time and energy consumption in the sustainable grinding process. In this study, for the first time, the results of changes in the parameters of the dressing process and changes in the topography of the grinding surface on the surface roughness of the Inconel 738 have been presented using single-edge and four-edge diamond dressers. The use of minimum quantity lubrication (MQL) and wet condition are other variables in this study to reduce the consumption of cutting fluid and prevent its destructive effects on the environment. The results indicate that the MQL technique increases the grinding performance of Inconel 738 by reducing ground workpiece surface roughness and decreasing the coolant–lubricant consumption comparing to the conventional wet grinding process. Additionally, it has been found from the experimental results that applying a single-edge dresser generates finer topography on the grinding wheel and, consequently, has a better surface finish in the grinding process compared to the multipoint diamond dressing tool with the same dressing and grinding parameters. In other words, increasing the dressing feed rate during dressing of the grinding wheel using a multipoint dresser makes a finer wheel surface topography and as a result decreases the surface roughness of the ground workpiece compared to a single-edge dresser. With multipoint diamond tools, the grinding performance during the life of the dressing tool also tends to remain more consistent, which is a definite advantage in automated production. Therefore, application of a multipoint dresser leads to a reduction in dressing time and increased production capability.

Fabrication of PCD face grinding wheel with positive rake angle by femtosecond laser and its performance evaluation in cemented carbide grinding

Super-hard abrasive grinding is considered to be the main approach to realize precision and ultra-precision machining of difficult-to-machine materials such as cemented carbide, engineering ceramics, titanium alloys and superalloy materials encountered. However, heavy grinding force, high grinding temperature and poor surface integrity are prone to be encountered in conventional negative rake angle grinding of difficult-to-machine materials. In response to these problems, a novel concept of positive rake angle grinding is first proposed and an abrasive grain regularly arranged binder-less polycrystalline diamond face grinding wheel with positive rake angle has been designed and fabricated by femtosecond laser ablation. To evaluate the grinding performance of the face grinding wheel with positive rake angle, grinding experiments of YG8 cemented carbide are conducted and compared with the traditional electroplated diamond grinding tool with equivalent abrasive grain dimension and distribution. The results show that compared with the conventional negative rake angle grinding, the normal and tangential forces in positive rake angle face grinding are reduced by 30.3 % ∼ 36.4 % and 21.1 % ∼ 29.3 %, respectively, and the ratio of normal to tangential force is reduced by 12.6 % ∼ 20.3 %. The surface roughness and average depth of subsurface metamorphic layer are also significantly smaller. The laser fabricated polycrystalline diamond face grinding wheel also has better wear resistance in the grinding of cemented carbide. Therefore, it can be concluded that better ground surface quality is obtained by the novel grinding wheel with positive rake angle. The innovative grinding method can fill the research gap on the grinding mechanism of positive rake angle grinding and further enrich the grinding theory of difficult-to-machine materials.

Molecular dynamics simulations of ultrasonic vibration-assisted grinding of polycrystalline iron: Nanoscale plastic deformation mechanism and microstructural evolution

Ultrasonic vibration-assisted grinding (UVAG) has attracted plenty of attention to significantly improve surface integrity. However, existing research has not systematically investigated the effect of vibration directions during UVAG at atomic and nanoscales, limiting our understanding of the plastic deformation mechanisms and microstructural evolution of ultra-precision machining. To address this issue, we proposed an MD model for multi-abrasive UVAG of polycrystalline iron considering various vibration directions. We comprehensively analyzed atomic flow fields, surface atom distributions, temperature fields, grinding forces, stress distributions, crystal orientations, and dislocation distributions. The simulation results demonstrate that UVAG effectively reduces grinding force and results in instantaneous grinding forces greater than conventional grinding (CG), and the instantaneous load impact phenomenon of radial vibration is more obvious. In surface morphology, axial vibration contributes to reducing surface roughness, while radial vibration is detrimental to surface smoothness. Microstructural evolution is mainly induced by stress. The primary plastic deformation mechanisms in UVAG of polycrystalline iron involve lattice rotation and dislocation mediation. Compared to axial vibration-assisted grinding (AVAG), radial vibration-assisted grinding (RVAG) and elliptical vibration-assisted grinding (EVAG) exhibit finer grain refinement, with RVAG leading to the highest dislocation density.

Effects of thermo-chemical treatment and grinding process of external cylindrical surfaces on residual stresses in 13CrMo4-5 steel

This paper presents a study aimed at determining the effect of the carburizing treatment process and the subsequent grinding process on the residual stresses occurring in ring-shaped specimens made of 13CrMo4-5 steel.During the tests, vacuum carburizing was used, achieving an effective case depth ECD = 0.5 mm. Subsequently, the cylindrical outer surfaces of the samples were ground by conventional plunge grinding and with innovative kinematics using a test stand based on a conventional flat-surface grinding machine. As part of the study, microhardness and residual stresses were measured before and after grinding. Measurements were carried out to a depth of 1 mm. The main component of the stand is an original special device that allows the cylindrical specimen to be clamped. Then the angle between its axis of rotation and the axis of rotation of the grinding wheel is set with respect to the plane of the grinding machine’s magnetic table. In the described tests, the axis of rotation of the cylindrical specimen was deviated from its original position by 15 and set at an angle of 75 to the axis of rotation of the grinding wheel. The specimens were ground with a grinding wheel of noble electro-corundum marked 38A60K8V. In both kinematic cases of the grinding process, a machining allowance of 0.01 mm was removed.Grinding using innovative kinematics did not cause any significant changes in the microhardness distribution, either for vacuum or conventional carburizing. In addition, residual stress measurements using the Dawidenkov-Sachs method showed that innovative grinding enables a more favourable distribution than those obtained after conventional plunge grinding.Further research will focus on, among others, selecting the angular settings of the workpiece axes relative to the grinding wheel axes depending on their dimensions. Grinding guidelines should include coverage ratio, infeed value, grinding time, and peripheral speeds. In addition, the plan for future research includes measuring the components of the grinding force and the geometric structure of the surface.Grinding process is a crucial stage of steel treatment in almost every industrial branch. In sustainable manufacturing, it is extremely important to produce high-quality items while reducing the cost of manufacturing and taking care of the environment and workers’ health.The proposed test stand, together with the authors’ device, makes it possible to conduct machining of the external surfaces of cylindrical workpieces on a flat surface grinder. In this case, the innovation of the grinding process consists of the non-parallel alignment of the cylindrical rotational axis of the specimen and the rotational axis of the grinding wheel with respect to the plane of the magnetic grinding table.

Sustainable grinding approach to analyze surface integrity of nickel-based superalloy using atomized green cutting fluid

In order to alleviate the difficulties pertinent with conventional grinding, the current study investigates the influence of ultrasonic-assisted grinding and atomized lubricants on surface integrity. Ionic Liquid (ILs) based Rice Bran Oil (RBO) green cutting oil has been utilized as cutting fluid. The sustainability analysis revealed that ILs-based RBO is environment-friendly as compared to its counterparts. The study comprises of analysing residual stresses, microstructural analysis, hardness measurement, and surface characterization. X-Ray Diffraction (XRD) technique has been used to evaluate the residual stresses, and then, an exhaustive microstructural analysis has been done using Electron Backscattered Diffraction (EBSD). The outcomes of the current study reveals that the dual benefits of ultrasonic vibration along with atomized cutting fluid significantly enhanced the surface integrity of the ground surface. Additionally, the compressive nature of residual stress was perceived during Ultrasonic-Assisted Grinding with Atomized Fluid (UAGAF), which was higher than its counterparts. The microstructural analysis showed that the proposed process affects the microstructure minimum vis-à-vis other grinding schemes. The upshots of the current study proved the UAGAF process to be a key step towards sustainable grinding and consolidated the capability of the UAGAF to be employed for the grinding of Nimonic 80A.

Preventing thermal osteonecrosis through 3D printed ceramic grinding tool

Conventional grinding tools in orthopedic surgery and neurosurgery are solid in structure, leading to a limited amount of coolant that can reach the bone surgery zone, and therefore causing localized high-temperature-induced issues (infection, necrosis, and complications). Additive manufacturing allows the incomparable design and manufacturing freedoms and offers the opportunity to redesign the surgery tool to suppress the grinding temperature within a safe range. Here we present a hollow ceramic grinding tool enabled by additive manufacturing. Our CFD simulation and experiments have proved that, owing to the new design, the coolant can better reach the surgery zone, not only helping to restrict the heat accumulations, but also to remove excessive bone debris. In the in vivo test, we found that, the new design produced less apoptosis and edema area to the rat brain in comparison with the conventional tool. This design minimizes the occurrence of complications such as osteonecrosis due to high surgical temperatures, opening new opportunities for the development of orthopedic surgical tools using additive manufacturing technology.

Magnetic non-destructive evaluation of microstructural and mechanical characteristics of hardened AISI H13 die steel upon sustainable grinding

This paper describes the potential of non-destructive techniques such as micro-magnetic Barkhausen noise (MBN) to assess the grinding burn flaws in terms of microstructural and mechanical indices of hardened AISI H13 die steel. To overcome this grinding burn issue, minimum quantity lubrication grinding with eco-friendly machining fluids like paraffin oil (PO) and castor oil (CO) was adopted and compared its performance with well-established conventional grinding like wet and dry. Ground surface integrity with castor oil (CO) was found to be significantly improvement in surface quality including lower surface roughness (Rα: 0.23 μm and Rz: 1.83 μm) with uniform surface topography, absence of oxidization and carbonization film, and negligible change in microhardness and microstructure. The reason is strong and uniform anti-friction and anti-wear tribo-film was produced by castor oil, which minimizes heat penetration through limited ploughing and rubbing action. The MBN outcome i.e., root mean square (RMS) has followed a linear relation with microhardness and temperature of the ground sample with a correlation coefficient of 0.993 and 0.981. Besides, lower amplitude and wide peak envelope get shifted towards a higher magnetic field in the MQL-CO grinding caused by poor thermal softening effect on the ground sample, which restricts magnetic domain wall movement and rotation. These outcomes could guide tooling industries for efficient sustainable grinding with faster thermal damage assessment, which helps to minimize production cycle time and back to clean environment.

Multi-objective optimization for the machining performance during ultrasonic vibration-assisted helical grinding hole of thin-walled CF/BMI composite laminates

In this paper, a helical machining method using ultrasonic vibration in association with a hollow grinding wheel, was proposed for hole-making in carbon fiber/bismaleimide (CF/BMI) composite laminates. Comparative studies between ultrasonic vibration-assisted helical grinding (UVHG) and conventional helical grinding (CHG) were carried out. The effects of machining parameters on the output characteristics (cutting force, hole-wall surface roughness, and exit defect) were investigated. The findings indicated that the thrust force and circumferential resultant force of UVHG were reduced by 9.3–55.9% and 15.4–24.7%, respectively. Meanwhile, the UVHG method had an effective impact on surface roughness reduction, and exit defect suppression. The machining parameter optimization model was developed with the objectives of enhancing efficiency while minimizing surface roughness and exit defects. NSGA-II was created to address the multi-objective optimization problem, and the optimal parameter solutions were obtained. Via confirmation tests, the predictions of the optimization model were validated as realistic. The significance of this study lies in the comparative analysis and multi-objective optimization with varied machining parameters, which emphasizes the advanced UVHG method using hollow grinding wheels in the thin-walled laminates hole-making process.

THEORETICAL RESEARCH OF PROCESS REGULARITIES OF GRINDING STRUCTURAL-HETEROGENEOUS ORGANIC MATERIALS

For the efficient functioning and successful development of the animal production sector, the key condition is correct feeding of animals. This feeding is only possible if enough feed is produced, nutrient losses during harvesting are reduced, and feed is correctly prepared for feeding. The introduction of concentrated feed helps to achieve a balance between energy, protein and amino acid content in the animal ration. Technologists compose and select components of feed rations based on the species, age group, morphological and biological characteristics of animals, as well as other factors. Despite the chosen technology and feeding strategy, concentrated feeds such as processed cereals based on wheat, barley, corn and other crops continue to be the main source of nutrients for animals. The quality of grinding concentrated feed is important for animal productivity. This treatment results in the formation of numerous particles with a larger surface area, which promotes faster digestion and better absorption. Grinding is one of the most high-energy processes used in animal feed technology. Since plant residues are structurally uneven, this makes it difficult to use conventional grinding methods efficiently, which reduces their energy efficiency and requires the use of several grinding stages with appropriate equipment. In order to ensure efficient processing of agricultural plant residues, it is important to create an appropriate technical infrastructure, given the significant energy costs associated with traditional processes of preparing biomass for granulation. To do this, it is necessary to conduct research aimed at solving the problem of energy-efficient grinding of structurally heterogeneous materials, in particular materials that contain a large amount of moisture. This is what determines the relevance of this research topic.

Mitigating first charge overpotential of Li2S-based lithium-sulfur batteries by leveraging PVDF reaction with the LiOH/Li2O layer

The high overpotential observed during the first charging process of Li2S-based lithium sulfur batteries (Li2S-LSBs) poses a challenge for their development, as it leads to irreversible side reactions. One possible cause for this overpotential is the high hygroscopic nature of Li2S, which results in the formation of a highly insulating LiOH/Li2O layer on the surface of Li2S particles. This study proposes a novel method to reduce the first charge overpotential of Li2S-LSBs by utilizing the reaction between the polyvinylidene fluoride (PVDF) binder and the LiOH/Li2O layer on the surface of the Li2S particles. Model reactions demonstrate that LiOH or Li2O can readily react with PVDF through dehydrofluorination at room temperature. While a battery made with a Li2S cathode slurry containing PVDF, prepared using conventional grinding for 30 min, displays high charging voltages with an overpotential spike of 3.74 V during the first charge, a battery prepared using a slurry stirred for 48 h exhibits significantly reduced first charge voltages, with an overpotential spike of only 2.75 V. The study also reveals that PVDF can undergo similar dehydrofluorination with Li2S, which leads to a decrease in discharge capacity due to the consumption of some Li2S. This study provides new insights into the origin of overpotential during the first charging process of Li2S-LSBs and suggests that stirring Li2S cathode slurry in the presence of PVDF can effectively reduce the first charge overpotential of Li2S-LSBs.

Subsurface damage inhibiting and synchronous removal behavior of Cf/SiC composites with laser-induced controllable ablation during abrasive belt grinding

Aiming at improving the machinability of Cf/SiC composites, this study proposed laser-induced controlled ablation grinding (LICAG) method. Cf/SiC composites samples with various ablating depths were prepared through picosecond laser, which were then ground by abrasive belt. The results showed that Cf/SiC composites were sublimated in laser ablating zone, resulting in dentate grooves covered with loose SiO2 oxides products. The grinding force and temperature during LICAG could be decreased by up to 64.0% and 58.8%, respectively, compared with conventional grinding (CG). Carbon fiber fracture was reduced, SiC matrix and carbon fibers were removed almost synchronously during LICAG; therefore, the surface quality was improved. Moreover, subsurface micro cracks were found near the grinding surface but did not propagate downward along the fibers. Grinding chips of CG were primarily broken fibers and broken SiC matrix; on the contrary, those generated during LICAG were mostly regular fiber bundles connected to SiC matrix.