Research of artificial joints coatings obtained by using a magnetronic method

Abstract

The article analyses the possibility of using a magnetronic method of coating for the formation of more durable ceramics (TiO2) and metal or metal alloy (Ag, Co, Co-Cr-Mo, Zr) coatings of endoprostheses on a polyethylene implant. Chirulen (ISO5834-2, POLY Hi Solidur MediTECH), special design (for medical purposes) high molecular weight polyethylene has been used for investigation. The coatings are applied either directly onto the polyethylene or by using a bond, e.g., Ag, Co. Materials used in tests are suitable for medical implants. Three types of implant surface have been made in order to investigate the friction coefficient reducing possibilities. In the paper was analyzed which of surface forms is tend to wear less after tests. The pilot studies carried out in this way showed that the best adhesives and durability characteristics have Co+TiO2 coating of nanostructure. When using Zr, Ag+Co+TiO2, Ag+Co-Cr-Mo and Ag+TiO2 the coatings are less durable and tend to wear more quickly due to poor adhesion. Appointed, that smooth implant surface tends to wear more quickly.