ABSTRACT
I 2 I I * Y. LIU, S. LIU, Q. X. LIU and D. J. LI · 1College of Physics and Electronic Information Science, Tianjin Normal University, Tianjin 300074, P.R. China 2Tianjin Electronic lnfomzation Vocational Technology College, Tianjin 300110, P.R. China
1. INTRODUCTION
A protective coating on man-made implants should possess desirable biocompatibility in the environment of biological fluids, as well as suitable mechanical and tribological properties and corrosion performance for a given application. In other words, it must not have an adverse response, such as excessive deposition of fluid components, abnormal cellular growth and toxic or allergic reactions, or thrombosis in the case of blood-contacting devices. Such a coating should also possess satisfactory resistance to compression, tension, shear, wear, or corrosion when it is used in specific applications, such as total joint replacement, orthopedic pins and screws, dental prostheses, intraocular lens, etc. [1-4].
