High-Temperature Dry Sliding Friction and Wear Characteristics of As-Cast SiCP/A356 Composite

The influence of temperature on the dry sliding wear behavior of as-cast SiCp/A356 composite under 150r/min, 6N and 30 min has been illustrated in this paper. The results reveal that the wear rate is very sensitive to the change of temperature and it exhibits lower wear rate at the range from 100°C to 200°C. However, the wear rate increases linearly due to adhesive wear operating a long duration at 250°C. The friction stability decreases sharply with the temperature raising. Formation of continuous grooves and some damaged regions are presented on the worn surfaces of the samples at lower and intermediate temperature. Parallel lips (wave like material flow) along the sliding direction are observed at higher temperature of the sample. The wear mechanisms involve an initial oxidative wear regime and spalling wear regime for a long duration and followed by an adhesive wear regime as the temperature raising.