Dry Wear Behaviour of Bio-ceramic Coated cp-Ti by Electrophoretic Deposition

Metals, ceramics, polymers and composites are frequently used in the biomaterial field. Especially metallic materials are used instead of bone or soft tissue in skeletal and cardiovascular systems. These materials are generally choosed from stainless steel, titanium and its alloys, CoCrMo, magnesium and its alloys. Since metallic implants biodegrade over a certain period of time, the implants produced are used with different surface modifications depending on their lifetime. Therefore, the degradation resistance of permanent invasive titanium and alloy implants should be increased. One of the surface treatments that will reduce biodegradation are bioceramic coatings. In this study, h-BN (bioceramic) was applied by electrophoretic deposition on commercial grade titanium. The adhesion of h-BN powder is enhanced with carboxylmethyl cellulose (CMC). The effect of different powder and cement rates on dry wear performance has been investigated. Coating was carried out at 50 V process voltage for 15 minutes. Wear tests were carried out under 1 and 3 N loads with reciprocating motion. Considering the wear rates and coefficients of friction, it was observed that the coatings with CMC and h-BN had higher wear resistance than the untreated sample.