Modification of mechanical properties of sintered implant materials on the base of Co–Cr–Mo alloy

The issue of joint alloplastics has been a subject of research and studies of different fields of engineering, such as mechanical, materials and chemical. Despite many attempts to improve the design of prosthetic implant and materials, the major problem with all designs of joint replacement prostheses is wear. Of the existing materials in common use Co–Cr–Mo alloys are widely used in implants such as prosthetic hips and knees due to their mechanical properties, good wear and corrosion resistances as well as biocompatibility. Recently, many researches have focused at the improvement of tribological behaviors of implant materials in order to lengthen the endoprostheses life. The powder metallurgy method of manufacturing allows obtaining new materials with better exploitative properties. The aim of presented research was to analyze the influence of chosen modifiers on mechanical properties of composite materials on the base of Co–Cr–Mo alloy. The following additives were approved for research: calcium pyrophosphate, boron carbide and silicon nitride. Results show that composites can be the alternative materials for biomedical applications.