Abstract
In the present study, SiC particle reinforced molybdenum–disilicide (MoSi 2) matrix composites have been fabricated by hot press sintering and in situ reaction sintering process successfully. Hot pressed SiCp/MoSi 2 composite has a phase constituent with about 20 vol.% α-SiC and less Mo 5Si 3 in MoSi 2 matrix. In situ SiC/MoSi 2 composite contains about 24.5 vol.% β-SiC and a small amount of Mo 5Si 3 in MoSi 2 matrix. Two types of SiC/MoSi 2 composites have been improved in their hardness, flexural strength and fracture toughness. Compressive yield strength of SiC/MoSi 2 composites at 1200 and 1400°C has also been enhanced obviously. Wear behavior test abraded on Al 2O 3 and SiC grind wheel has shown very excellent wear resistance of SiC/MoSi 2 composites compared with monolithic MoSi 2.
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