Tribological Behavior of Mg- Mg_2Si In-situ Composite

摘要

Mg-Mg_2Si in-situ composites by the addition of Si in Mg have become more attractive . since the Mg_2Si phase impedes the grain boundary sliding at elevated temperature because of its inherent properties which greatly improve the heat and wear resistances. In the present work, Mg-Mg_2Si composites have been prepared by the liquid state processing with different amount of silicon additions. The microstructure and dry sliding tribological behavior of the composites have been studied. SEM studies reveal the wear mechanisms involved in these composites. The results indicate that wear rate of the composites is a function of Mg_2Si content in the composite. The effect of Mg_2Si morphology and distribution on the overall mechanism is also discussed.