Abstract
Magnesium metal matrix composites (MMCs) reinforced with various fractions of 10, 15 and 20 vol.% B 4C particulates fabricated by powder metallurgy (P/M) technique were investigated. Microstructure characterization of the composites revealed necklace distribution of B 4C particulates in the matrix material and the presence of minimal micro-porosity. The X-ray diffraction (XRD) showed the formation of MgO and MgB 2 in B 4C/Mg composites. Moreover, the results revealed that the hardness and wear resistance of the composites were higher than those of as-cast Mg ingot and increased with increasing amount of B 4C particulates from 10 to 20 vol.%.
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