Friction and wear properties of artificial joints of CoCrMo alloy

Abstract

CoCrMo alloy is an excellent material for manufacturing prosthesis. Due to the complex body environment, the prosthesis has a higher requirement for surface abrasion resistance and corrosion resistance. In this paper, the friction and wear properties of CoCrMo alloy artificial prosthesis were studied by a ring block friction-wear testing machine. The results indicate that the friction coefficient of CoCrMo alloy decreases with the increase of the load and rotation speed. The wear mass of the CoCrMo alloy has a good wear resistance and is suitable for manufacturing prosthesis. However, the surface of the CoCrMo alloy partially cracks under heavy load through SEM analysis, which indicates the prosthesis is not suitable for patients who often engage in heavy carrier forces.