Abrasive Behavior Research Articles

Synergic effects of physio‐mechanical performances on sliding‐rolling tribological and abrasion behaviors of polyisoprene based aviation tire treads

AbstractAbrasion and tribological properties of tread rubber play a crucial role in governing the service life of aviation tires and the safety of aircrafts. Polyisoprene (IR) with the same chemical structure as natural rubber shows great potential for application in aviation tires. Herein, the abrasion and tribological behaviors of IR based composites under sliding‐rolling conditions were investigated in relation to the carbon black (CB N234) content, sliding‐rolling ratio, ambient temperature, and counterparts in order to provide guidance for the development of high‐performance aviation tire treads. Moreover, the relationship between wear performances and physical–mechanical properties was discussed to establish a prediction model. The results revealed that physical and mechanical properties affected wear performances in a synergetic manner, which could be described as a negative linear correlation of the folding wear with the product of hardness and rebound resilience (H4R) and the ratio between rebound resilience and tensile strength ((1‐R)/σ) even at elevated temperature and sliding‐rolling ratio regardless of the counterpart. The increase in CB N234 content and sliding‐rolling (s‐r) ratio resulted in a transition of the wear mechanism from folding to abrasion due to the formation of soft rubber particles with a certain fluidity and a lubricating transfer film that was located at the friction interface and was generated by the thermal‐mechanical degradation of the IR matrix when it was rubbed against steel counterparts, which marred the aforementioned negative linear relationship.Highlights The increase in temperature improved the abrasion resistance of tire treads. The folding wear was negatively and linearly related to H4R and (1‐R)/σ. Increasing CB N234 content and s‐r ratio made a transition of wear mechanism.

Investigating the effect of nanobubble-based cutting fluid on tool wear and cutting forces in milling of Inconel 718

Machining of Nickel-Based Superalloys (NBSAs) is characterized by rapid work hardening, low thermal conductivity, and extreme abrasive behavior. Due to such characteristics of NBSAs, the machining of materials like Inconel 718 (IN718) results in extensive tool wear and high cutting forces. The present study employs nanobubble-based cutting fluid during machining of IN718 and investigates its effect on tool wear and cutting forces. The trochoidal milling experiments were conducted on an IN718 workpiece with nanobubble-based and normal cutting fluid at varying surface speeds. The evolution of tool flank wear area and peak resultant cutting force were recorded and compared to evaluate the effectiveness of nanobubble-based cutting fluid over normal cutting fluid. The results showed that nanobubble-based cutting fluid lowers the tool wear rate by enhancing heat dissipation and reducing abrasion wear. However, higher cutting forces were observed with nanobubble-based cutting fluid due to increase in hardness of the workpiece. Also, it is realized that using nanobubble-based cutting fluid can significantly improve the lifespan of the tool, leading to sustainable manufacturing.

Abrasion Behaviors of Silica-Reinforced Solution Styrene-Butadiene Rubber Compounds Using Different Abrasion Testers.

Solution styrene-butadiene rubber (SSBR) is widely used to improve the properties of tire tread compounds. Tire wear particles (TWPs), which are generated on real roads as vehicles traverse, represent one of significant sources of microplastics. In this study, four SSBR compounds were prepared using two SSBRs with high styrene (STY samples) and 1,2-unit (VIN samples) contents, along with dicyclopentadiene resin. The abrasion behaviors were investigated using four different abrasion testers: cut and chip (CC), Lambourn, DIN, and laboratory abrasion tester (LAT100). The abrasion rates observed in the Lambourn and LAT100 abrasion tests were consistent with each other, but the results of CC and DIN abrasion tests differed from them. The addition of the resin improved the abrasion rate and resulted in the generation of large wear particles. The abrasion rates of STY samples in the Lambourn and LAT100 abrasion tests were lower than those of VIN samples, whereas the values in the CC and DIN abrasion tests were higher than those of VIN samples. The wear particles were predominantly larger than 1000 μm, except for the VIN sample in the DIN abrasion test. However, TWPs > 1000 μm are rarely produced on real roads. The size distributions of wear particles > 1000 μm were 74.0-99.5%, 65.9-93.4%, 7.2-95.1%, and 37.5-83.0% in the CC, Lambourn, DIN, and LAT100 abrasion tests, respectively. The size distributions of wear particles in the Lambourn and LAT100 abrasion tests were broader than those in the other tests, whereas the distributions in the CC abrasion test were narrower. The abrasion patterns and the morphologies and size distributions of wear particles generated by the four abrasion tests varied significantly, attributable to differences in the bound rubber contents, crosslink densities, and tensile properties.

Achieving near-zero particle generation by simplicity of design—A compliant-mechanism-based gripper for clean-room environments

Lab Automation facilitates high-throughput processes and improves reproducibility and efficiency while removing human action, primary source of contaminating particles. Handling poses a risk of contamination due to close contact with the objects. We propose a novel gripper (CrocoGrip) relying on compliant mechanisms to reduce the amount of contaminating particles generated by the gripper rather than preventing their emission, the latter being the common approach in current grippers. Our novel gripper is actuated by linear solenoids and purely relies on deformation for its motion. As a result, abrasive behavior and, therefore, the generation of particles is reduced without the need for additional sealing. We experimentally proved that only particles smaller than 3.0µm are emitted by the gripper, with a large proportion of the particles being generated by the actuation. The CrocoGrip fulfills the demands of ISO14644 class 5. The gripping relies on the deformation energy of the compliant mechanism, making the gripping energy-efficient and safe. The maximum gripping force achieved by the CrocoGrip was 5.5N. Because the force transmitted to the handling object depends on the design of the gripping jaws, which are interchangeable, the force can be reduced for more sensible handling objects. Using three different sets of jaws, CrocoGrip was able to handle a microplate in SBS-standard, a 50mL Falcon tube, and a Ø60mm Petri dish using a robotic arm. Due to the monolithic design of the CrocoGrip and, as a result, the need for few components, we achieve a simplicity of design, making cleaning, sterilization and maintenance easy, even for nonexperts. The CrocoGrip exploits the advantages of compliant mechanisms, especially for applications requiring clean-room environments. This approach of compliant-mechanism-based grippers enables an increase in the cleanliness of handling processes without an increase in system complexity of the gripper to facilitate the lab automation of highly sensible processes, such as in tissue engineering.

Effect of TiO2 Nanofillers on the Mechanical and Abrasive Wear Properties of Epoxy Reinforced with Carbon Fabric Hybrid Composites.

Recent studies show that nanofillers greatly contribute to the increase in the mechanical and abrasive behaviors of the polymer composite. In the current study, epoxy composites were made by hand lay-up with the reinforcement of carbon fabric and titanium dioxide (TiO2) nanoparticles as secondary reinforcement in weight percentages of 0.5, 1.0, and 2.0. Hardness, tensile, and abrasive wear tests have been carried out for the fabricated composites. The obtained results confirm that as the percentage of filler addition increases, hardness of the carbon epoxy (CE) composite increases, and significant enhancement of 10.25% hardness is confirmed in 2 wt % nano TiO2-added CE composite. The CE composite filled with 2 wt % of TiO2 nanofiller shows 15.77 and 9.15% improvement of tensile strength and modulus, respectively, compared to unfilled CE composites. The abrasive wear volume exhibits a nearly linear increasing trend as the abrading distance increases. In addition, it is discovered that the abrasive wear volume is greater for higher applied loads. The inclusion of nano TiO2 reduced the wear loss in the CE composite for all abrading distances, regardless of the load, low or high. The scanning electron microscopy analysis of worn surfaces was carried out to analyze the contribution of the filler to improve the wear resistance.

Test and application of abrasion characteristics of brown rice

The abrasion characteristics of brown rice in the polishing unit of the rice mill are not clearly understood, which greatly limits the new development need of moderate milling. Therefore, a single rice abrasion characteristic test platform with adjustable normal force, grit number of abrasive surface and sliding distance was set up. The results showed that both the normal load and the grit number significantly influence mass loss and specific abrasion area. It was found that the abrasion coefficient decreases with increasing load and increases with larger grit number. The abrasive surface of brown rice grain was inspected to understand abrasion behavior. The rice kernels lying on the plate milled by abrasive plane is more conducive to the restoration of nutritious embryo. An application of abrasion characteristics combining the milling information from simulation was proposed, aiming at provided a method for the digital design of the rice mill.

Comparative Studies of Wear and Corrosion Behaviors of Conventional and Nano Filler Based Solvent Free Tarfree Epoxy-amine Coatings

Tar-free epoxy coatings aid in protecting intact of Mild Steel (MS) substrate immersion condition of atmosphere. From lot of study revised and assorted that tar free (light colour) epoxy amine coating developed which give better performance for protection in long term. By ASTM method, wear behaviors as well as mechanical properties of quartz (micro silica) and organosiliane (nano silica) based tar-fee epoxy coatings were studied. DETA cured epoxy composites coatings were characterized by FTIR spectroscopic technique, powder X-Ray Diffraction (XRD), SEM and FESEM analysis. Transmission Electron Microscope (TEM) confirmed the size of nano particles. The data of wear index of nano fillers based epoxy coating was observed 8.3mg/1000cycles which indicate such an improvement of of abrasion behavior. Corrosion behaviors of the coated MSspecimens were evaluated by Cathodic Disbondment (CD) test immersion in 3.5% NaCl solution. Water absorption and chemical resistance also studied of composite coatings. All over tar-free epoxy-amine nano composite coating shows good result.

Hardness and abrasive behaviour of chrome-doped TiO2 obtained by electrochemical anodization in an HCl-based solution

Hardness and abrasive behaviour of chrome-doped TiO2 obtained by electrochemical anodization in an HCl-based solution

Tribological behaviors of two distinct classes of white etching layers on rail surface

The presence of hard, brittle, thin White Etching Layers (WELs) on rail surfaces plays a critical role in varying the tribology behaviours at the wheel and rail interface. The reciprocating sliding tests were carried out on the rail samples covered with two types of WELs, including thermomechanically-induced WEL (TP-WEL) and mechanically-induced WEL (SD-WEL) at room temperature and 600 °C. A WEL-free rail sample was also employed for the comparison. The wear mechanism of WEL-free rail shifts from severe abrasive wear at room temperature to adhesive dominant wear at 600 °C. Under the pressurized sliding conditions of 1.2 GPa at 600 °C, the WEL-free rail was observed to form WEL and BEL. The pre-existed SD-WEL and TP-WEL on the rail samples could transform into worn WEL at the topmost contact rail surface with Brown Ething Layer (BEL) formation beneath it. The formation of BEL is attributed to the tempered effect on pre-existed WEL. Due to their high hardness, both SD-WEL and TP-WEL-covered rails exhibit minimal abrasive behaviours at room temperature while displaying adhesive dominant wear mechanisms at 600 °C. Of the two types of WELs, TP-WEL has lower wear resistance, whereas SD-WEL promotes high friction and reduces wear loss.

Corrosion and abrasion behavior of high-temperature carburized 20MnCr5 gear steel with Nb and B microalloying

This paper investigates the effect of Nb and B microalloying on the wear and corrosion resistance of 20MnCr5 steel after high-temperature carburization at 950 °C. The abrasion and corrosion performance of the steel was compared using electrochemical experiments and dry sliding wear tests. The results show that Nb microalloying reduces the size of residual austenite, thereby improving the wear resistance of 20MnCr5 steel. Furthermore, the combination of Nb and B microalloying reduces the amount of residual austenite, leading to further improvements in wear resistance. Both microalloying methods reduce the wear scar depth and debris accumulation. The corrosion potentials of 20MnCr5, 20MnCr5Nb, and 20MnCr5NbB are 0.645 V, 0.627 V, and 0.675 V, respectively. The addition of Nb to 20MnCr5 steel results in higher corrosion resistance after carburization due to the refinement of needle-like martensite. However, 20MnCr5NbB steel exhibits low corrosion resistance due to the coarsening of needle-like martensite caused by B microalloying. In summary, this study provides new insights into the effects of microalloying elements on the properties of steel. The findings contribute to a deeper understanding of how to design and manufacture gears and other components with superior wear and corrosion resistance.

Material removal characteristics in submerged pulsating air jet polishing process

In this paper, the material removal characteristics and mechanism of submerged pulsating air jet polishing (SPAJP) process are investigated by polishing experiment on K9 glass and computational fluid dynamics simulation. The experimental results show SPAJP can etch almost perfect Gaussian footprints with high stability. Under comparable condition, SPAJP achieves nearly 300 times higher material removal rate (3.0 × 10−3 mm3/min) than that of traditional fluid jet polishing (FJP) (9.9 × 10−6 mm3/min) at the cost of a moderate degradation in processed surface roughness from Sa 3.97 nm by FJP to Sa 20.49 nm by SPAJP. Jet evolution, abrasive behavior and material removal mechanism in SPAJP are clarified by numerical modeling and experimental jet observation. It is found that SPAJP relies on jet instability of the submerged airflow beam to entrain and accelerate abrasive particles in the slurry, achieving stable and efficient polishing removal on the workpiece surface. To explore the potential of the process for deterministic polishing, an array structure surface is then designed and polished by SPAJP. The processing results are consistent with numerical prediction results, indicating that the new process has good material removal controllability which makes it applicable to deterministic polishing. This study highlights the possibility of using SPAJP to produce ultra-precise surfaces in terms of form control or fabricate high precision optical components in a more efficient and convenient manner.

Effect of Whitening Toothpastes with Different Active Agents on the Abrasive Wear of Dentin Following Tooth Brushing Simulation.

The aim of this research was to evaluate the abrasive dentin wear that can be induced by three commercial whitening toothpastes following a tooth-brushing simulation (TBS) corresponding to a three-month period. Sixty human canines were selected, and the roots were separated from the crowns. Then the roots were randomly divided into six groups (n = 10) and were submitted to TBS using the following slurries: Group 1-deionized water (RDA = 5); Group 2-ISO dentifrice slurry (RDA = 100); Group 3-a regular toothpaste (RDA = 70); Group 4-a charcoal-containing whitening toothpaste; Group 5-a whitening toothpaste containing blue covasorb and hydrated silica; and Group 6-a whitening toothpaste containing microsilica. Following TBS, surface loss and surface roughness changes were evaluated using confocal microscopy. Additionally, surface morphology and mineral content changes were observed using scanning electron microscopy and energy-dispersive X-ray spectroscopy. The deionized water group presented the lowest surface loss (p < 0.05), while the charcoal-containing toothpaste presented the highest surface loss, followed by ISO dentifrice slurry (p < 0.001). Blue-covasorb-containing and regular toothpastes did not present statistically significant differences (p = 0.245), and neither didmicrosilica-containing toothpaste or ISO dentifrice slurry (p = 0.112). The surface height parameters and surface morphology changes of the experimental groups followed the surface loss patterns, while no differences were detected in mineral content after TBS.Although the charcoal-containing toothpaste exhibited the highest abrasive wear to dentin, according to ISO 11609, all the tested toothpastes exhibited appropriate abrasive behavior towards dentin.

Investigations of Abrasive Wear Behaviour of Hybrid High-Boron Multi-Component Alloys: Effect of Boron and Carbon Contents by the Factorial Design Method

This paper is devoted to the evaluation of the "three-body-abrasion" wear behaviour of (wt.%) 5W-5Mo-5V-10Cr-2.5Ti-Fe (balance) multi-component (C + B)-added alloys in the as-cast condition. The carbon (0.3 wt.%, 0.7 wt.%, 1.1 wt.%) and boron (1.5 wt.%, 2.5 wt.%, 3.5 wt.%) contents were selected using a full factorial (32) design method. The alloys had a near-eutectic (at 1.5 wt.% B) or hyper-eutectic (at 2.5-3.5 wt.% B) structure. The structural micro-constituents were (in different combinations): (a) (W, Mo, and V)-rich borocarbide M2(B,C)5 as the coarse primary prismatoids or as the fibres of a "Chinese-script" eutectic, (b) Ti-rich carboboride M(C,B) with a dispersed equiaxed shape, (c) Cr-rich carboboride M7(C,B)3 as the plates of a "rosette"-like eutectic, and (d) Fe-rich boroncementite (M3(C,B)) as the plates of "coarse-net" and ledeburite eutectics. The metallic matrix was ferrite (at 0.3-1.1 wt.% C and 1.5 wt.% B) and "ferrite + pearlite" or martensite (at 0.7-1.1 wt.% C and 2.5-3.5 wt.% B). The bulk hardness varied from 29 HRC (0.3 wt.% C-1.5 wt.% B) to 53.5 HRC (1.1 wt.% C-3.5 wt.% B). The wear test results were mathematically processed and the regression equation of the wear rate as a function of the carbon and boron contents was derived and analysed. At any carbon content, the lowest wear rate was attributed to the alloy with 1.5 wt.% B. Adding 2.5 wt.% B led to an increase in the wear rate because of the appearance of coarse primary borocarbides (M2(B,C)5), which were prone to chipping and spalling-off under abrasion. At a higher boron content (3.5 wt.%), the wear rate decreased due to the increase in the volume fraction of the eutectic carboborides. The optimal chemical composition was found to be 1.1 wt.% C-1.5 wt.% B with a near-eutectic structure with about 35 vol.% of hard inclusions (M2(B,C)5, M(C,B), M3(C,B), and M7(C,B)3) in total. The effect of carbon and boron on the abrasive behaviour of the multi-component cast alloys with respect to the alloys' structure is discussed, and the mechanism of wear for these alloys is proposed.

Study on material removal mechanism of sapphire wafer with CeO2 coated diamond composite abrasives via green polishing

Toxic and polluted ingredients are normally employed in the chemical mechanical polishing of sapphire wafers, which results in widespread environmental pollution. Thus, developing a novel green polishing technology is a significant challenge to achieve ultra-smooth and efficient polishing. In this study, novel CeO2 coated diamond composite abrasives were used in the semi-fixed abrasive polishing of sapphire wafers, which were successfully synthesized by a modified precipitation approach without using explosive hazardous chemicals. During the whole polishing process, the polishing slurry only contains deionized water, without any other chemical reagents, to avoid environmental pollution. Polishing results showed that the surface roughness of sapphire polished by the composite abrasives was reduced to 6.1 nm, which was 26.5 % lower than that of pure diamond. Meanwhile, the material removal rate was 1.46 nm/min, with an improvement of 10.6 %, as well as a reduction in residual stress by approximately 29.8 %. Combined with the theory of micro-contact mechanics, the polishing mechanism and interfacial contact behavior of composite abrasives were investigated in depth through the analysis of polished sapphire surface and wear debris. The improvement of polishing performance may be attributed to the enhancement of solid-state reaction and its mutual balance with the mechanical removal action of composite abrasives.

Microstructure and Dry/Wet Tribological Behaviors of 1% Cu-Alloyed Austempered Ductile Iron

In this study, different austempering conditions were applied to 1 wt.% Cu-alloyed ductile iron to produce various austempered ductile irons (ADIs). The study aimed to explore the variations in microstructure, hardness, and dry/wet wear behaviors of the ADIs. The experimental results indicated that the microstructure of the 300 °C-ADI has denser needle-like ausferrite, lower retained austenite content, and higher carbon content in austenite compared with the 360 °C-ADI. As the austempering time increased, the retained austenite content decreased, while the carbon content of austenite increased. Regardless of dry or wet abrasive behavior, the wear resistance of the ADIs was significantly superior to that of the as-cast material. The ADI obtained at 300 °C for 10 h demonstrated the best wear resistance performance.

Abrasion behavior of TiO2 catalyzing H2O2 to synergistically remove single crystal 6H-SiC under ultraviolet irradiation

Ultraviolet photocatalytic-assisted chemical mechanical polishing technology can effectively improve the processing efficiency and surface quality of single crystal SiC. In this paper, the chemical mechanical synergy (CMS) effects of TiO2 catalyzing H2O2 to synergistically remove single crystal 6H-SiC under ultraviolet irradiation were investigated by means of friction and wear. The ball-on-disk friction and wear test was carried out under two conditions M-Ⅰ (UV light for 20 min) and M-Ⅱ (UV light only in the last 10 min). The results showed that under UV light irradiation, anatase TiO2 exhibited photocatalytic and abrasive effects (including mending effect, rolling effect, ploughing effect, polishing effect and protective film effect) during the friction process. The longer the irradiation time, the stronger the chemical reaction on the oxidation of SiC by TiO2 catalyzing H2O2; the higher the TiO2 concentration, the greater the material removal of SiC. At last, the material removal model of single crystal SiC under the condition of ultraviolet light on TiO2 catalyzing H2O2 was established, and the synergistic effect of mechanics and chemistry was analyzed intuitively.

Investigations on microstructure, thermo-mechanical and tribological behavior of graphene oxide reinforced AA7075 surface composites developed via friction stir processing

Surface composites (SCs) are fabricated through reduced graphene oxide (RGO) particulates by adopting friction stir process (FSP) route to enhance the mechanical and thermal properties suited for cylinder liner applications. Microstructural examination reveals that both dynamic recrystallization phenomenon and particle stimulated nucleation happens in the duration of processing phase and owes to a fine and homogenous distribution of reinforcements in the matrix surface. Moreover, no sort of noticeable defects are formed between the base matrix and SC layer with prominent interface. An indigenous experimental setup is fabricated for the measurement of thermal conductivity of SCs. Percolation effect of reduced graphene oxide (RGO) particulates enhance the thermal conductivity of single pass SC specimen (158.6 W/mK) as compared to base metal (146 W/mK). Formation of highly conductive RGO through reduction of oxygen level owing to the heat generation at the processing stage that favors for the high heat dissipation of the five pass specimen (201.5 W/mK). Decremented interparticle spacing of the aforementioned specimen through reduced grain size (9 μm) enhances the impact toughness. Increased number of dislocations through grain refinement in the five pass specimen relieves the internal stress at a more possible extent which significantly reduces the coefficient of thermal expansion (CTE) value to 7.18 × 10−4 K−1. Superior Vickers hardness value (2188 MPa) enhances the specimen wear resistance. The worn morphology divulges the mild adhesive with abrasive behavior.

Effect of Ni Content on Microstructure, Mechanical Properties, and Abrasion Behavior of Fe-B-C Alloy

The microstructure, mechanical properties, and abrasion resistance of an Fe-2wt%B-0.35wt%C alloy with various Ni contents were analyzed. As the Ni addition increases, the Ni content of the matrix and M2B (M indicates Fe, Cr, and Mn) increases linearly with the relationships of y = 0.992x and y = 0.224x, respectively. With the Ni content increasing from 0 wt% to 1.2 wt%, the critical cooling rate of the alloy changes from 0.5 °C/s to 0.1 °C/s, which decreases the volume fraction of as-cast pearlite from 72.86 vol% to 3.49 vol%. Moreover, the Ni atom replacement is helpful in the formation of edge dislocation in the M2B, facilitating an increase in the toughness characteristic δ A of M2B from 2.85 to 3.04. Interestingly, when the Ni content is less than 0.9 wt%, the heat treatment makes a huge contribution to the macrohardness, bending stress, and abrasion resistance of alloy, owing to the formation of martensite. However, once the Ni content exceeds 0.9 wt%, heat treatment plays a negative role in the macrohardness, bending stress, and abrasion resistance of the alloy, because of the precipitation of M23(B,C)6.

Tribochemical mechanisms of abrasives for SiC and sapphire substrates in nanoscale polishing.

Strong acid, alkali, or active chemicals are generally employed in chemical mechanical polishing (CMP) slurry for the ultra-precision machining of semiconductor substrates, obstructing further improvement in machining accuracy and reduction in damaged layers. Understanding the material removal behavior of abrasives, which combines mechanical and chemical actions during nanoscale abrasive polishing, poses a significant challenge. In this study, the interfacial interaction mechanisms between abrasives and substrates during nanoscale polishing with only deionized water used as coolant were analyzed by utilizing concerned experiments and molecular dynamics (MD) simulations. The results showed that ultra-smooth SiC and sapphire substrate surfaces only with damage layer thicknesses of 2.06 nm and 0.76 nm were obtained by employing diamond abrasive and alumina abrasive, respectively. Tribochemical reactions could occur on substrate surfaces under the repeated interfacial fiction of fine abrasives without any chemical reagents during nanoscale polishing. The tribochemical reactions mainly depended on the chemical compatibility between the abrasives and substrates when the material removal size of abrasives was limited to nanoscale, not abrasive hardness. Furthermore, a new method of abrasive selection is proposed and widely applied in the ultra-precision polishing of semiconductor substrates, which could not only improve removal efficiency but also ensure good surface quality.

Evaluation by scanning electron and atomic force microscopy to analyze the abrasive behavior of composites with silicon carbide

RESUMO A pasta de cimento é a parte do compósito cimentício que possui baixa resistência ao atrito e suas propriedades mecânicas e microestruturais são determinantes para a durabilidade do material. As técnicas de microscopia são comumente utilizadas para elucidar esses comportamentos mecânicos, físicos e químicos de compósitos cimentícios. O objetivo deste trabalho foi elucidar a importância de técnicas de microscopia para avaliação direta do comportamento abrasivo de pastas de cimento com micropartículas de carbeto de silício (SiC). A metodologia do trabalho consistiu na fabricação das amostras de pastas cimentícias de referência e com 10% de adição de SiC, análise das propriedades mecânicas compressivas e abrasivas, além de ensaios de Microscopia Eletrônica de Varredura (MEV) e Microscopia de Força Atômica (MFA). Os resultados mostraram que a intensificação das propriedades mecânicas com adição de micropartículas de SiC podem ser relacionados com as micrografias obtidas no MEV, através do acentuado preenchimento dos poros, e por meio da atenuada rugosidade superficial identificada no MFA. Concluiu-se que os resultados de rugosidade e porosidade, adquiridos pelas técnicas de MEV e MFA, podem fornecer informações relevantes para análise da durabilidade de materiais cimentícios.