State Key Laboratory of Mechanical Transmission;
Chongqing University;
Chongqing 400044;
China;
Chongqing Branch;
Lubricant Co.ltd.SINOPEC;
Chongqing 400039;
China;
Center for Surface Engineering and Tribology;
Northwestern University;
Evanston;
IL 60208;
USA;
State Key Laboratory of Mechanical Transmission;
Chongqing University;
Chongqing 400044;
China;