摘要
研究Ａｌ２Ｏ３／ＴｉＢ２／ＳｉＣｗ三元复合陶瓷材料与硬质合金往复滑动摩擦时，在不同气氛和温度条件下的摩擦磨损特性。结果表明，随温度和气氛不同，材料的摩擦系数有着不同的变化规律。在高温空气气氛中摩擦时，ＳｉＣ晶须氧化生成的表面氧化膜可起到固体润滑剂的作用，能降低摩擦系数。由于ＳｉＣ晶须的氧化使得材料表面晶须的增韧补强作用削弱，因而加速了材料的磨损。通入氮气有利于减轻ＳｉＣ晶须的氧化，但由于硬质合金中的Ｃｏ扩散到陶瓷材料中，使材料产生粘着磨损和扩散磨损。
Friction-wear behavior both in air orin N,atmosphere at different temperature rangingfrom 200℃ to 800℃ has been studied for Al2O3/TiB2/SiCw ceramic composite against cemented carbide(YG8).The friction coefficient and wear ratewere examined.Results showed that substantialimprovement in wear resistance can be obtainedwhen sliding in N2 atmospher at high temperature.The mechanism responsible to the improvementwas determined to be the prevention of oxidation ofSiC whiskers.A drop in wear resistance of thiscomposite when sliding in air atmosphere at hightemperature were accompanied by oxdation of SiCwhisker.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
1996年第4期105-107,共3页
China Mechanical Engineering
基金
山东省教委资助
