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ABSTRACT Copper matrix composites containing different volume fractions of B4C particles (0–15%) were first fabricated by spark plasma sintering followed by hot rolling in atmospheric environments, then their microstructures, phase… Click to show full abstract
ABSTRACT Copper matrix composites containing different volume fractions of B4C particles (0–15%) were first fabricated by spark plasma sintering followed by hot rolling in atmospheric environments, then their microstructures, phase compositions, mechanical properties and sintering mechanism were investigated. It was found that B4C particles distributed relatively homogeneously in the copper matrix. Reaction products of CuC8 and B were observed and identified in the composite. Under increasing B4C particle content, the ultimate tensile, yield strength and elongation to fracture of the composites decreased. Failure mode of composites included: (1) the interfacial debonding and (2) the cleavage fracture of copper. Moreover, micro-discharge between the adjacent particles occurred, and its led to local high temperature at the interface.
Journal Title: Materials Science and Technology
Year Published: 2018
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