A study on dry sliding wear behaviour of hybrid metal matrix composites at room temperature

摘要

An attempt has been made to study the dry sliding wear behaviour of Aluminium based hybrid composites in room temperature. Al 2219 is used as base material with B_4C and MoS_2 as reinforcements. The hybrid composite were prepared by conventional stir casting technique. The dry sliding wear test were carried out for various parameters like sliding distance, applied load and sliding speed. The Optical Microscope and SEM results showed the presence of B_4C and MoS_2, which are fairly uniform and randomly dispersed on matrix material. XRD analysis, shown the presence of B_4C and MoS_2 phases in the prepared composites. The incorporation of reinforcement particles B_4C and MoS_2 reduces the specific wear rate of composites. The addition of MoS_2 as a secondary reinforcement has significant effect on reducing specific wear rate of prepared composites. By using SEM worn surface of hybrid composites were studied.