Abstract
In this work, in situ synthesis with infiltration casting and subsequent heat treatment was applied to fabricate vanadium carbide (V8C7) particulate-reinforced iron matrix composites. The microstructure and wear-resistance of V8C7 particulate-reinforced iron matrix composites with different volume fraction were studied using scanning electron microscopy, X-ray diffraction, and wear testing. The V8C7 particles were uniformly distributed in the matrix, and the size of the V8C7 reinforcement was 2–12μm. The relative wear resistance of the composites initially increases decreases with higher V8C7 volume fractions. The best wear resistance of the composites was 21.2 times higher than that of gray cast iron under a 20N load. This was achieved at 24% V8C7 volume fraction. Wear of the composites manifests as grooves, broken carbide particles, and re-embedment of wear debris.
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