SiC含量对混杂复合材料摩擦磨损性能的影响

研究了ＳｉＣ含量对ＳｉＣ和石墨（Ｇｒ）颗粒混杂增强铝基复合材料摩擦磨损性能的影响。Ａｌ／ＳｉＣ＋Ｇｒ的磨损率随ＳｉＣ含量升高先下降,在２０ｖｏ％时达到最低值;然后则随ＳｉＣ含量升高而升高。当载荷为２０Ｎ时,摩擦系数随ＳｉＣ含量同而升高。当载荷为６０Ｎ时,摩擦系数与ＳｉＣ含量关系不大。

Effect of the Fraction of SiC on the Wear and Friction Performance of Silicon Carbide and Graphite Particulates Reinforcing Aluminum Matrix Composite

WT5BZ]The effect of the fraction of SiC on the wear and friction performance of silicon carbide and graphite particulates reinforcing aluminum matrix composite was investigated The wear rate of Al/SiC+Gr volume was found to decrease with fraction of SiC from 10vol% to 20vol%, and reach a valley value at 20vol%, then ascend with fraction of SiC from 20vol% to 40 vol% The analysis shows that the increase of the fraction of SiC leads to change in two mechanical properties of Al/SiC+Gr One is increase of hardness; the other is decrease of plasticity When the fraction of SiC is less than 20vol%, the effect of hardness increase of Al/SiC+Gr on the wear performance is more than that of decrease of plasticity , so the wear rate of Al/SiC+Gr increases with the fraction of SiC Otherwise,the effect of plasticity decrease on the wear performance of Al/SiC+Gr is more than that of hardness increase, so the wear rate of Al/SiC+Gr decreases with the increase of the fraction of SiC