Abstract
The erosion of a continuously reinforced SiC (Sigma 1140 plus)/Ti–6Al–4V composite was investigated with a SiC/water slurry jet at various angles on a plane perpendicular to the direction of the reinforcement. The results demonstrate the combination of both ceramic and metallic properties. Both the low-angle erosion resistance of ceramics as well as the high-angle resistance of a metallic alloy lead to an overall reduction in erosion rate at the various angles. Ti/SiC composite shows the best erosive wear resistance indicating that the combination effect between ductile Ti-based matrix and high strength SiC fibre for continuously fibre-reinforced Ti-based metal matrix composites (MMCs) plays a key role in increasing the erosive resistance. To gain a better understanding of the combination and synergistic enhancement of erosion resistance for two components in SiC/Ti composite materials, a shadowing effect and effect of reducing impact energy on SiC fibre during erosion are discussed. A simple theoretical model based on experimental data and a modified inverse rule-of-mixtures averaging law of erosion resistance for SiC fibre-reinforced MMCs are discussed.
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