摘要
研究了高纯度致密的多晶Ti3AlC2块体材料对低碳钢的干滑动摩擦、磨损特性及摩擦表面的氧化行为。实验在盘–块式高速摩擦试验机上进行,滑动速度为20～60m/s,法向压强为0.2～0.8MPa。结果表明:随着滑动速度的提高,摩擦系数减小,Ti3AlC2的磨损率增大。法向压强的增大导致Ti3AlC2磨损率增大,但对摩擦系数的影响较小。在60m/s和0.8MPa下,摩擦系数仅为0.1左右,而Ti3AlC2的磨损率仅为2.5×10–6mm3/(N·m)左右。如此低的摩擦系数和磨损率归因于Ti3AlC2表面摩擦氧化薄膜的存在。该薄膜由非晶态的Ti,Al和Fe的混合氧化物组成,具有良好的润滑–减磨作用。
Some friction, wear characteristics and the frictional oxidation of a highly pure, dense polycrystal Ti3AlC2 bulk dry sliding against low carbon steel were investigated. Tests were carried out on a block-on-disk type high speed friction tester, and several sliding speeds of 20 ntis to 60 ntis as well as several normal pressures of 0.2 MPa to 0.8 MPa were selected. The results show that the friction coefficient decreases and the Ti3AlC2 wear rate increases with increase in sliding speed. The increase of normal pressure results in the increasing of the Ti3AlC2 wear rate, only it has a smaller effect on the friction coefficient. At 60 ntis and 0.8 MPa, the friction coefficient becomes as small as 0.1, and the wear rate of Ti3AlC2 is of only about 2.5×10^-6 mm^3/（N· m）. The very low friction coefficient and wear rate can be attributed to the presence of a frictional oxide film consisting of amorphous Ti, Al and Fe oxides, which have a significant antifriction effect on the friction surfaces.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2006年第5期523-526,共4页
Journal of The Chinese Ceramic Society
基金
国家"863"计划(2003AA332080)
国家自然科学基金项目(50472045)
北京交通大学优秀博士生科技创新基金(48014)资助项目。
关键词
钛铝碳
摩擦系数
磨损率
摩擦氧化膜
滑动速度
titanium aluminum carbide
friction coefficient
wear rate
frictional oxide film
sliding speed
