Abstract: 3Y-TZP ceramic was treated under atmospheric pressure and 100℃ boiling water for 0~100 hours. Friction and wear properties of aged 3Y-TZP were tested under 120 N load, 0.42 m/s sliding velocity and distilled water as lubricant. The results indicated that increased aging time decreased both hardness and bending strength of 3Y-TZP ceramic. The friction coefficient of aged 3Y-TZP ceramic decreased firstly and then increased while wear rate of 3Y-TZP increased as the aging time was prolonged. The main wear mechanism of no-aged 3Y-TZP was ploughing and plastic deformation. The worn surface of 3Y-TZP ceramic after 50 h aging was controlled by plastic deformation and microfracture. A transition of wear mechanism occurred because severe wear was observed for 3Y-TZP ceramic. After 100 h aging, fracture became predominant on the worn surface.

Key words: 3Y-TZP ceramic; friction and wear; low-temperature aging; wear mechanism

Author: LIANG Xiaoping, 1. Key Laboratory of Hollow Fiber Material and Process of Ministry of Education, Tianjin Polytechnic University, Tianjin 300160, China; 2. School of Material Science and Engineering, Tianjin Polytechnic University, Tianjin 300160, China;

E-mail: tjpulxp@yahoo.com.cn 

Tribology, Vol. 30, Issue 1, 2010, 64~67