摘要
研究了Ａｌ２Ｏ３／ＴｉＢ２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，ＴｉＢ２氧化生成的表面氧化膜可起到固体润滑剂的作用，并且能阻止Ｃｏ的扩散，减轻粘着，因而能降低摩擦系数，并有利于提高材料的耐磨性能；而在高温氮气气氛中摩擦时，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 or in N 2 atmosphere at different temperature ranging from 200℃ to 800℃ was studied for Al 2O 3/TiB 2 ceramic composite against cemented carbide(YG8).The friction coefficient and wear rate were examined.Results show that substantial improvement in friction and wear performance can be obtained when sliding in air at high temperature.The mechanism responsible for the improvement was considered to be the formation of a lubricious oxide film.Decrease in wear resistance and increase in friction coefficient of the composite when sliding in N 2 atmosphere at high temperature were accompanied by adhesion and diffusion of Co elements to this ceramics.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
1996年第6期648-653,共6页
Journal of The Chinese Ceramic Society
关键词
硼化钛
复合陶瓷
摩擦
磨损
高温
陶瓷
titanium diboride,ceramic composite,friction and wear,high temperature
