Abstract
The mechanical and tribological properties of aluminum matrix composites are mainly determined by the cohesion and uniformity of the reinforcing ceramic particles. The cohesion of the reinforcing ceramic particles represents a very important issue which is mostly poor at temperatures near the melting point of aluminum and leads to inferior mechanical and tribological properties of developed aluminum matrix composites with non uniform distribution of reinforcement. The main reason for coating the particles is to improve the bonding between reinforcement and molten alloy and thus to eliminate interfacial reactions. The great enhancement in strength values of the composites in this study can be ascribed to the effective load bearing capacity of disintegrated B4C particles which are adherently bonded to the matrix alloy. Homogeneity and reduction in the particle size of B4C during the extrusion process is evidenced in the microstructural studies.
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Shabani, M.O., Mazahery, A. Good bonding between coated B4C particles and aluminum matrix fabricated by semisolid techniques. Russ. J. Non-ferrous Metals 54, 154–160 (2013). https://doi.org/10.3103/S1067821213020120
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DOI: https://doi.org/10.3103/S1067821213020120