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Inert materials are titanium, zirconium, tantalum, and poor wear resistance. , Titanium and zirconium by micro-arc oxidation treatment to improve the biocompatibility and wear resistance. Micro-arc oxidation of tantalum has not been reported, less research on the tribological properties of titanium micro-arc oxidation film biological, zirconium and tantalum micro-arc oxidation film biotribology performance study is rarely reported . In this paper, micro-arc oxidation technology in titanium, zirconium and tantalum surface in situ generated porous oxide film layer containing calcium and phosphorus elements, micro-arc oxidation film morphology, structure and composition, and in 25% fetal calf serum lubrication conditions Handicap reciprocating friction and wear test, the friction and wear characteristics of oxide film in the physiological environment. The results show that, titanium, zirconium, tantalum, micro-arc oxidation film is rough and porous, and as the anode voltage increases, the film thickness increases, the pore size increases. Zirconium relative to the micro-arc oxidation film, the pore size and thickness of the titanium and tantalum micro-arc oxidation film is relatively large. MAO coatings were higher than the hardness of the matrix, and the elastic indentation modulus lower than the matrix. The titanium MAO coatings 300V voltage by the anatase YiO2, into rutile TiO2 anatase TiO2 gradually with increasing voltage, phase composition. Zirconium micro-arc oxidation film is mainly composed of cubic zirconia, tetragonal zirconia and a small amount of monoclinic zirconia. Tantalum micro-arc oxidation film Ta2O5, TAO and CaTa2O6,,. The MAO coatings with 25% fetal calf serum lubrication conditions Si3N4 ceramic ball friction and wear tests showed that the coefficient of friction of titanium, zirconium, tantalum micro-arc oxidation film were higher than the matrix, in addition to the 450V titanium micro-arc oxidation film other film wear rate is lower than the matrix, showing good wear resistance. The study compared titanium, zirconium, tantalum micro-arc oxidation film biological friction and wear properties. Titanium micro-arc oxidation film / the Si3N4 ball friction factor is higher than tantalum MAO coatings / the Si3N4 ball friction factor, but less than zirconium micro-arc oxidation film / the Si3N4 friction factor. Zirconium micro-arc oxidation film wear rate is relatively high. Worn surface of titanium and tantalum micro-arc oxidation film traces of plowing; zirconium micro-arc oxidation film peeling pit more, bigger, zirconium micro-arc oxidation film than the other two film more brittle, more prone to fatigue spalling wear. Three metal micro-arc oxidation film friction and wear to abrasive wear, both the microscopic cutting and fatigue spalling two mechanisms.
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