Distribution Of SiCp Research Articles

Synergistic enhancement of modulus and ductility in Mg matrix composites: A new strategy for GNPs&MgOnp and SiCp hybrid reinforcement

SiC particles (SiCp) reinforced magnesium matrix composites (MMCs) exhibit elevated specific stiffness. However, the non-uniform distribution of SiCp and the interfacial cracking between the SiCp and Mg matrix compromise the ductility. This paper presents a novel approach to enhance the modulus and ductility of the MMCs by utilizing in-situ synthesized graphene nanoplatelets (GNPs) and MgO nanoparticles (MgOnp). The in-situ reaction of GNPs and MgOnp (GNPs&MgOnp) conducted at a high temperature (720 °C) demonstrates an improvement in the local agglomeration of SiCp compared to the conventional semi-solid temperature (590 °C). Moreover, the GNPs&MgOnp optimized interfacial structure and transferred the load during plastic deformation, inhibiting stress concentration and crack propagation at the interface of SiCp. The ductility and modulus are enhanced by approximately 70 % and 10 % compared to SiCp/Mg-6Zn composites, demonstrating the effectiveness of the strategy employing micro-nano hybrid reinforcement and synergistic enhancement of ductility and modulus.

Solid-State Synthesis of SiC Particle-Reinforced AZ91D Composites: Microstructure and Reinforcement Mechanisms

Safe and efficient recycling of industrially generated machined chips is a high-priority technological issue. In this study, the effect of SiC particles (SiCp) on the microstructure and mechanical properties of SiCp/AZ91D composites is systematically analyzed, and the reinforcement mechanism of SiCp on composites is investigated. Different contents of SiCp/AZ91D composites are fabricated by solid-state synthesis. The results show that the incorporation of SiCp refined the grains of SiCp/AZ91D composites, which is related to the uniform distribution of SiCp at the grain boundaries. The strong bonding of SiCp with the AZ91D matrix inhibited the generation and extension of cracks, which led to the simultaneous increase in the yield strength (YS) and elongation (EL) of the SiCp/AZ91D composites. The mechanical properties of the 3 wt.% SiCp/AZ91D composites are the most superior, with an average grain size, Vickers hardness, ultimate tensile strength (UTS), YS, and EL of 6.69 ± 4.48 μm, 89.5 ± 2.5 HV, 341 ± 11 MPa, 172 ± 8 MPa, and 4.43 ± 0.18%, respectively. The reinforcement mechanisms of SiCp/AZ91D composites are mainly grain refinement and dislocation strengthening. Solid-state synthesis is an effective method for recycling magnesium alloy chips.

Enhancing damping capacity and mechanical properties of aluminum matrix composites by the synergistic strengthening of SiC particles and carbon fibers

A colloidal dispersion and suction filtration novel technique was developed to fabricate SiC particles (SiCp) and carbon fibers (Cfs) synergistically reinforced Al matrix composites (SiCp-Cfs/Al composites). The SiCp and Cfs could be uniformly inserted into the Al matrix by the approach, and the manufactured SiCp-Cfs/Al composites exhibited a dense structure, according to microstructural observations of the composites. The tensile strength and damping capacity of SiCp-Cfs/Al composites were dramatically increased when compared to SiCp reinforced Al matrix composites. The homogenous distribution of SiCp and Cfs in the Al matrix, which offers an excellent synergistic strengthening effect, is responsible for the simultaneous improvement of the strength and damping properties of the SiCp-Cfs/Al composites.

Microstructure characteristics and thermodynamic properties of A357-SiCp/A357 layered composites prepared by semi-solid vacuum stirring suction casting

A357-SiCp/A357 layered composites were prepared using a semi-solid vacuum stirring suction casting method. The microstructures, mechanical properties, and thermal conductivities of the composites fabricated under different suction casting processes were compared. Additionally, the microstructural evolution characteristics and performance enhancement mechanism of the A357-SiCp/A357 layered composites were discussed. The results demonstrate that suction casting at 610 °C with a low solid phase ratio can significantly enhance the material density and reduce the agglomeration of SiCp. The A357-SiCp/A357 interface is clear and straight with good bonding. With an increase in the suction casting temperature, the bending resistance and thermal conductivity of the A357-SiCp/A357 layered composites exhibit a trend of significantly increase at first and then slowly decrease owing to casting defects, interface bonding, and SiCp distribution. Compared with SiCp/A357 composites, the bending strength, deflection, and thermal conductivity of the A357-SiCp/A357 layered composites increase from 257 MPa, 1.07 mm, and 155.72 W·(m·K)−1 to 298 MPa, 2.1 mm, and 169.86 W·(m·K)−1, respectively. This study provides a reference for improving the rheological casting of aluminum matrix layered composites.

Filtration Efficiency in the Recycling Process of Particle-Reinforced Aluminum Alloys Using Different Filter Materials

In this study, filtration of aluminum alloy (Al) with different weight fractions of SiC particles (SiCp) was investigated. Therefore, three different filter materials of 20 pores per inch (ppi) ceramic foam filters (CFF) were tested. A special three-chamber furan mold was used for the casting trials to provide uniform filling and flow conditions for the filtration process. Samples from sections of the gating system, as well as from the filter, were analyzed by optical light microscopy to determine the amount, size, and distribution of SiCp. A scanning electron microscope (SEM) with energy-dispersive X-ray spectroscopy (EDS) was used for obtaining the element distribution in the composite. The filtration efficiency increased by decreasing the weight fraction from 20 to 5% of SiCp and reached a significant particle reduction of over 90%. Investigations of CFFs with a weight fraction of 10% have shown a clogging effect and metal flow interruption through the 20 ppi filter. An oxide layer was detected around the respective SiCp in the EDS. Moreover, a strong accumulation effect was observed, indicated by a steadily flattening curve of the density functions after each additional remelting cycle of the same composite material.

Processing Route Optimization and Characterization of Al6063–SiCp Metal-Matrix Composite Sheets

The target of this study is to develop routes for processing Al–SiCp (SiC particulate) sheets with improved microstructures; namely, the uniform distribution of SiCp and minimized porosity throughout the whole material, thereby improving its mechanical properties. Al–SiCp composites reinforced with 5, 10, and 15 vol.% SiC and having three average sizes of 29, 17, and 8.5 µm were produced using a semi-automated stir-casting machine; finally, the bars were hot rolled to get the final sheet dimensions. The rolling steps were performed based on the results of thermomechanical simulations performed on the cast blocks. The first rolling steps were applied according to a safe rolling schedule to avoid cracking via encouraging dynamic recrystallization. The last rolling steps were performed to improve the hardness and strength of the metal matrix composites (MMCs). A refinement in grain size from an average of 420 µm in the as-cast condition to an average of about 85 µm after rolling was observed. Some heterogeneity in grain size was observed where the regions with larger, elongated grains were associated with the zones depleted by SiCp reinforcement. Reinforcing with SiCp led to a small increase in tensile strength of 10–20 MPa, and this was further improved to about 60 MPa and 110 MPa for the 5 and 10 vol.% SiCp conditions, respectively, after a T6 heat treatment.

MPFEM simulation on hot-pressing densification process of SiC particle/6061Al composite powders

A hot-pressed compact with high density and uniform stress plays a decisive role in improving the quality of sintered composites. The multi-particle finite element method was utilized to simulate the hot-pressing densification process of SiC particle (SiCp)/6061Al composite powders with huge differences in stiffness and plasticity. The densification mechanism was revealed at macro and particulate scales. Two- and three-dimensional finite element models were both constructed to investigate the effects of pressing temperature, SiCp content and size ratio of 6061Al and SiCp on the relative density and stress distribution of the powder mass. Simulation results demonstrate that pressing temperature and the content and distribution of SiCp have significant effects on the required pressing pressure, relative density and stress distribution of the compact. Compared with cold compaction, the pressing pressure required for compaction can be reduced by 2–3 times at 390–515 °C. The intermediate particle size ratio of 6061Al and SiCp is beneficial for relatively high relative density and low stress of the compact. The fitting of the simulation results verifies the robustness of the established finite element model.

Effect of grain refining by cyclic extrusion compression (CEC) of Al-6061 and Al-6061/SiC on wear behavior

Cyclic extrusion compression (CEC) is an effective fabrication process for producing fine, ultrafine grains with superior physical and mechanical properties.In the present work, CEC process was applied on Al alloy 6061 and its silicon carbide (SiCp) composite containing 5 and 10 wt. % SiCp. . The specimens were pressed at room temperature up to 6 cycles for Al alloy 6061, 5 cycles for Al 6061 5 wt. % and 4 cycles for Al 6061 10 wt. % SiC corresponding to plastic strains of 3.72, 3.1 and 2.48 respectively. The evolution of microstructure, hardness and dry sliding wear tests were conducted. The samples were investigated before and after the CEC process by optical microscope, and the worn surfaces were investigated by Scanning Electron Microscope (SEM) and (EDX) analysis. The CEC cycles reduced the grain size, porosity % and SiC particle size. These microstructural parameters were reflected on the increase in hardness and reduction in wear rate and a slight reduction in coefficient of friction. In general, this improvement in properties is associated with the following parameters; grain refining, reinforcement volume fraction, size and distribution of SiCp as well as the number of CEC cycles. Regarding the composite samples, a significant improvement in wear resistance was obtained and the Al 6061 10 wt. % SiC, showed the best performance. The wear mechanism was also affected by the CEC process.

In-situ reactions and mechanical properties of 6061 aluminum alloy weld joint with SiCp by laser melting injection

In order to overcome weld joint softening of aluminum alloy, laser melting injection (LMI) methodology with 6H-SiC particles (SiCp) and 6061 aluminum alloy was introduced. In this manufacturing, the molten pool morphology and temperature were gained by high speed camera and thermal imager. After LMI, a graded distribution of SiCp with 4.6%–4.8% volume fraction was obtained along the depth direction of weld. The aluminum grain under LMI (12.80 μm) was much finer than that under single laser welding (SLW) (40.94 μm). It was novel that the in-situ reactant Al4C3 platelets would mainly locate discontinuously on the SiC/Al interface whereas acicular Al4SiC4 was found primarily in the aluminum matrix. In addition, the nano-spherical simple substance carbon was precipitated around the surface of SiCp. Eventually, due to these particular in-situ reactions during laser welding with SiCp injection, the Vickers hardness of weld with SiCp was larger than that under SLW; a gradual hardness distribution in the depth direction of PRW was also observed; the tensile strength of weld with SiCp (192 MPa ~ 243 MPa) became much higher without sacrificing ductility than SLW (165 MPa); the failure mechanism of weld with SiCp would change from SiCp cracking to the SiCp decohesion with the increasing welding speed.

Synergistic Enhancement of the Strength-Ductility for Stir Casting SiCp/2024Al Composites by Two-Step Deformation

The 10 μm 10 vol% SiCp/2024Al composites sheet was successfully fabricated by semi-solid stir casting followed with two-step deformation (extrusion and rolling). The two-step thermal deformation solves the sheet rolling formability of the SiCp/2024Al composites produced by stir casting. Compared with the SiCp/2024Al composites prepared by traditional powder metallurgy, this paper innovatively studied the synergistic enhancement between CuAl2 phase and SiCp on the mechanical properties. The result shows that the two-step deformation can significantly improve the uniformity of the distribution of SiCp and CuAl2 phases. At the same time, the average size of the SiCp and CuAl2 phase decreases after the two-step deformation. During the hot extrusion, SiCp has an obvious hindrance to the refinement of the CuAl2 phase. Moreover, the SiCp/2024Al composites sheet exhibits excellent yield strength (295 MPa), ultimate tensile strength (489 MPa), and elongation (10.42%). The performance improvement of SiCp/2024Al after two-step thermal deformation is mainly attributed to the improved interface bonding strength of SiCp-2024 Al matrix, the refined SiCp and the more uniform distribution of SiCp.

Development and strengthening mechanisms of a hybrid CNTs@SiCp/Mg-6Zn composite fabricated by a novel method

The hybrid addition of CNTs was used to improve both the strengths and ductility of SiCp reinforced Mg matrix composites. A novel method was developed to simultaneously disperse SiCp and CNTs in Mg melt. Firstly, new [email protected] hybrid reinforcements were synthesized by CVD. Thus, CNTs were well pre-dispersed on the SiCp surfaces before they were added to Mg melt. Therefore, the following semisolid stirring and ultrasonic vibration dispersed the new hybrid reinforcements well in Mg-6Zn melt. The hybrid composite exhibits some unique features in microstructures. Although the distribution of SiCp was very uniform in the Mg-6Zn matrix, most CNTs distributed along the strips in the state of micro-clusters, in which CNTs were bonded very well with Mg matrix. Most of the CNTs kept their structure integrity during fabrication process. All these factors ensure that the hybrid composite have much higher strength and elongation than the mono SiC/Mg-6Zn composites. The dominant strengthening mechanism is the load transfer effect of CNTs. Apart from grain refinement, the CNTs toughen the composites by impeding the microcrack propagation inside the material. Thus, the hybrid [email protected] successfully realizes the reinforcing advantage of “1 + 1> 2”.

Different Tribological Behaviors of SiCp/AZ91 Composites Induced by Tailoring the Distribution of SiC Particles

In this study, the wear behaviors of the solution-treated and as-extruded SiCp /AZ91D metal matrix composites with different sizes and volume fractions of SiC particles were systematically investigated under different wear test parameters. The SiC particles exhibited a typical necklace-type distribution in the solution-treated composites and a homogeneous distribution in the as-extruded composites. Wear tests results showed that the wear rates of the as-extruded composites were lower than that of the solution-treated composites almost under all testing conditions and with the same SiC size and volume fraction. However, the dominant wear mechanisms for these two types of composites were different. The typical necklace-type distribution of SiCp in the solution-treated composites could effectively promote the occurrence of delamination owing to the weak bonding between SiCp and matrix in the particle aggregated regions. By contrast, as the bond between disperse SiCp and matrix was enhanced, the homogeneous distribution of SiCp in the as-extruded composites could promote the occurrence of adhesion and prevent the occurrence of delamination. Moreover, a higher applied load and higher volume fraction of SiCp obviously promoted the progress of delamination for the solution-treated composites, while the extent of the adhesive wear for the as-extruded composites was mainly associated with the increase of the applied load, sliding velocity and SiC particle size.

Development of multi-pass processed AA6082/SiCp surface composite using friction stir processing and its mechanical and tribology characterization

The uncontrollable wear at the surface of AA6082 against the EN-31 steel has restricted its use in the tribology application. Also, the mechanical properties of AA6082 play a crucial role on the surface wear. So, it is important to improve the mechanical properties to enhance the wear resistance of AA6082. Though, there are several research contributions available for the fabrication of Al/SiCp composite using Friction Stir Processing (FSP), no work pertaining to the AA6082/SiCp composite with multi-pass (one, two and three pass) condition was done earlier. Hence, the present work aims to improve the microstructure, mechanical and wear behavior of AA6082 through surface composite (AA6082/SiCp) fabricated using multi-pass FSP. The influence of multi passes on the microstructure, hardness, surface roughness, phase composition, tensile strength and wear rate are carried out. A significant improvement in the microstructure is achieved for the three pass condition due to the homogeneous distribution of SiCp with reduced particle size evidenced in Transmission Electron Microscope (TEM) analysis. The microhardness of AA6082/SiCp composite increased 2.5 times than the parent AA6082. The strong interfacial bonding between the SiC particle and Al matrix has been achieved for three pass FSPed composite, which is significantly improved the Ultimate Tensile Strength (UTS). The transformation of severe adhesive wear to mild abrasive is observed in a three pass FSPed AA6082/SiCp composite. Wear track characterization is employed using Scanning electron microscope (SEM) to examine the wear mechanism of AA6082 and AA6082/SiCp composites against the EN-31 steel under the dry sliding condition.

Investigation on mechanical properties and wear performance of functionally graded AZ91-SiCp composites via centrifugal casting

The tremendous characteristics that functionally graded materials (FGMs) have achieved in recent years made them desirable in many engineering applications, such as automotive and aerospace. FGMs have a smooth transition in the distribution of particles within the whole thickness of composites leading to a tailored product with gradient characteristics. This research aims to fabricate functionally graded (FG) AZ91/SiCp composites through the centrifugal casting method in order to investigate microstructure characterization, mechanical properties and wear resistance. Three weight fractions of SiCp (2.5, 5 and 10 wt.%) with average particle size 10 μm were used to develop the FG composites at 1000 rpm. The quality of SiCp distribution within the AZ91 matrix alloy was assessed with the optical microscope and the scanning electron microscope (SEM) analysis. The mechanical properties of FG composites, such as tensile strength and micro-hardness, were examined in addition to the particle analysis and wear loss. According to findings, the significant enhancement of mechanical properties and wear resistance for FG composites was observed with the addition of SiC particles comparing to the unreinforced alloys. It is also observed that the outer zone has higher strength and hardness values than in the transition and inner zones due to the higher concentration of SiCp. Therefore, the developed FG AZ91/SiCp composites can be used as an alternative material for the tube, cylinder and pipe products. These products are originally made out of aluminum or steel materials, and now it is possible to replace it with FG composites due to its superior mechanical properties and wear resistance.

Synthesis and characterization of 7075 Al alloy–SiC composites

PurposeMechanical properties are highly sensitive to the microstructure, and these are indirectly related to solidification parameters and processing conditions. AA7075 possesses lightweight and excellent properties as structural material which can be optimized with SiCp addition and a good fabrication technique.Design/methodology/approach7000 series aluminium alloys exhibit the highest mechanical properties. They are used for high-strength structural applications such as aircraft parts and sporting goods. The desirable properties of these alloys are: low density, high stiffness, specific strength, good wear resistance and creep resistance. The focus of this work is to investigate the microstructure of composites formed by the dispersion of silicon carbide particles (SiC) into AA7075 by stir casting processes. 7075 Al alloy is reinforced with 10 and 15 wt.% SiCp of size 10–20 µm by stir casting process. The composites have been characterized by X-ray diffraction and scanning electron microscopy, differential thermal analysis and electron probe microscopic analysis.FindingsSiCp distribution and interaction with AA7075 matrix have been studied. AA7075/10 wt.%/SiCp (10–20 µm) and AA7075/15 wt.%/SiCp (10–20 µm) composites microstructure showed excellent SiCp distribution into AA7075 matrix. In addition, no evidence of secondary chemical reactions has been observed in X-ray diffraction and electron probe microscopic analysis.Originality/valueLittle experimental work has been reported so far about effect of addition of 10 and 15 wt.% SiCp of size (10–20 µm) on the microstructure of 7075 Al alloy fabricated by stir casting process. The present investigation has been carried out to study the microstructure and carry out XRD, DTA and EPMA analysis of 7075 Al alloy, 10 and 15 wt.% SiCp of size (10–20 µm) composite and detect the interfacial reactions with the objective to minimize the formation of Al4C3.

Synthesis of Nanocrystalline AZ91 Magnesium Alloy Dispersed with 15 vol.% Submicron SiC Particles by Mechanical Milling.

The development of a magnesium matrix composite with a high content of dispersions using conventional liquid-phase process is a great challenge, especially for nanometer/submicron particles. In this work, mechanical milling was employed to prepare nanocrystalline AZ91 dispersed with 15 vol.% submicron SiC particles (SiCp/AZ91). AZ91 with no SiCp was applied as a comparative study with the same mechanical milling. In order to investigate the mechanism of dispersing, the morphology evolution of powders and the corresponding SiCp distribution were observed. As the scanning electron microscope (SEM) analysis exhibited, the addition of SiCp accelerated the smashing of AZ91 particles, which promoted the dispersion of SiCp in AZ91. Thus, after mechanical milling, 15 vol.% SiCp, which was smashed from 800 to 255 nm, got uniformly distributed in the Mg matrix. Based on X-ray diffraction (XRD) results, part of the Mg17Al12 precipitate got dissolved, and an Al-supersaturated Mg solid solution was formed. The transmission electron microscopy (TEM) results showed that the ultimate Mg grain (32 nm) of milled SiCp/AZ91 was much smaller than that of milled AZ91 (64 nm), which can be attributed to a pinning effect of submicron SiCp. After mechanical milling, the hardness of SiCp/AZ91 reached 185 HV, which was 185% higher than the original AZ91 and 33% higher than milled AZ91, due to fine Mg grain and submicron dispersions.

Preparation and characterization of the Al-Cu-Mg-Si-Mn composites reinforced by different surface modified SiCp

In this paper, the 4 vol% SiCp/Al-Cu-Mg-Si-Mn composites were prepared by method of stirring casting. The effects of SiCp surface modifications (oxidization and Ti-coating) and particle sizes (5 μm, 10 μm and 15 μm) on the microstructure and tensile properties of the composites were analyzed. The effects of SiCp sizes on the distribution of SiCp in the pre-oxidized SiCp/Al-Cu-Mg-Si-Mn composites were larger than those in Ti-coated SiCp/Al-Cu-Mg-Si-Mn composites. The Al-Cu-Mg-Si-Mn composites reinforced with Ti-coated SiCp exhibited more uniform SiCp distributions and higher tensile mechanical properties than those reinforced with the pre-oxidized SiCp. When the SiCp size was 15 μm, the Ti-coated SiCp/Al-Cu-Mg-Si-Mn composite showed the best yield strength (σ0.2), ultimate tensile strength (σUTS) and fracture strain (εf) of 410 MPa, 548 MPa and 7.6% with the increase of 10.2%, 2.6% and 5.6% than that of reinforced by pre-oxidized SiCp. The more uniformly dispersed particles and better tensile properties of the Ti-coated SiCp/Al-Cu-Mg-Si-Mn composites could be attributed to the better wetting between Ti-coated SiCp and molten Al.

Finite Element Analysis of Tool Particle Interaction, Particle Volume Fraction, Size, Shape and Distribution in Machining of A356/SiCp

The application of particulate reinforced metal matrix composite (PRMMC) has been increasing due to its superior strength and wear characteristics. The unique properties of PRMMC vary with respect to the volume fraction of reinforcement. In this paper a 2D Finite Element Analysis of A356/SiCp MMC during orthogonal turning is modelled and simulation is carried out using Abaqus as FE code. The main purpose of this study is to analyse the tool particle interactions and effect of volume fraction, size, shape and distribution during machining of A356/SiCp. In this model Lagrangian formulation approach is used. Johnson cook material model is employed for A356 and brittle cracking model is used for SiCp. Penalty contact method is used as the friction formulation with hard contact algorithm. The FE simulations are done for 0, 6, 12 and 15% of SiCp by volume, 60 and 12 micron of SiCp by size, circular & irregular shapes and uniform & irregular distribution of SiCp. The FE model created is validated with experimentally measured data, chip formation is simulated, tool-particle interaction is studied and effect of various volume fractions, sizes, shapes and distributions of SiCpin chip formation and stress pattern are analysed during the machining process using PCD tool insert.

Friction and wear behavior of SiC particles deposited onto paper-based friction material via electrophoretic deposition

Abstract In order to improve the friction and wear properties of the paper-based friction materials, SiC particles (SiCp) were uniformly deposited onto the paper-based friction material via electrophoretic deposition with 300 V, 400 V and 500 V deposition voltages, obtaining the SiCp-content of 10.8, 15.9 and 22.9 wt%. The microstructure and thermal stability of the paper-based friction materials were characterized by scanning electron microscope (SEM) and thermogravimetry (TG). And the porosity, mechanical and tribological properties of samples were tested by mercury injection apparatus, electromechanical universal testing machine and friction tester. The results show that the uniform distribution of SiCp in the paper-based friction materials decreases the porosity and obviously improves the thermal stability and mechanical properties. Meanwhile, the incorporation of SiCp increases the stability of friction coefficient and the wear resistance of paper-based friction materials. Especially, the wear rate of paper-based friction material with 400 V deposition voltage treatment (CP400) for optimal SiCp-content of 15.9% decreases by 51.2% from 5.8 × 10−14 to 2.8 × 10−14 m3/(N·m) compared with that of the bare paper-based friction material (CP0). The electrophoretic deposition techniques provide the possibility of uniform addition of micro-nano particles to the paper-based friction material, which is beneficial to improve the friction and wear properties.

Effect of Wettability Enhancement of SiC Particles on Impact Toughness and Dry Sliding Wear Behavior of Compocasted A356/20SiCp Composites

ABSTRACTIn this study, the effect of wettability improvement of SiCp on the impact and sliding wear behavior of A356/20 wt% SiCp composites produced by a compocasting technique has been investigated. The result showed an increase of incorporation and uniform distribution of SiCp in the A356 matrix by elimination of SiCp segregation. Desired bonding between SiCp and the aluminum matrix due to improved wettability resulted in enhanced properties in terms of improved impact toughness and wear resistance. This improvement was also associated with partial refinement of coarse eutectic silicon due to increased incorporation and distribution of SiCp reinforcements. The highest enhancement was obtained when 1% Mg was added into the melt in addition to pretreated SiCp. The impact toughness value increased by 10 and 26% and the wear rate decreased by 5 and 30% when the SiC was treated and when Mg was added, respectively, compared to as-received SiCp. The impact fracture surfaces showed fewer decohered and well-bonded SiC particles in A356–(SiC-treated-Mg) composite. The highest wear resistance of A356/SiCp composites was achieved by A356–(SiC-treated-Mg) composite for applied loads of 10 and 20 N compared to other fabricated composites. The worn surface revealed mild abrasion and adhesion wear mechanisms.