Study of Physical Properties of SiC_W /Al Composites During Unloaded Thermal Cycling

摘要

The thermal expansion coefficient of SiC_W/Al composites squeeze cast during unloaded thermal cycling was determined and analyzed. The study had shown that the thermal expansion coefficient of SiC_W/Al composites reduced greatly with temperature raising. The thermal expansion coefficient of artificial ageing treatment SiC_W/Al composites during unloaded thermal cycling reduced gradually, while the thermal expansion coefficient of squeezing SiC_W/Al composites increased gradually. In addition, the thermal expansion coefficient of SiC_W/Al composites reduced drastically with fiber fraction increasing.