Effect of Thermal Oxidation Temperature on the Properties of Micro-Arc Oxidation Ceramic Coating on TC4 Alloy

摘要

The effect of thermal oxidation temperature on the properties of MAO ceramic coating was investigated. The phase composition and surface morphology of oxidation coating were analyzed. The microhardness of oxidation coating were tested. The results shown that the composite oxidation coating consists of rutile, anatase,Ti and HA. With the thermal oxidation temperature increasing, the microhardness of composite oxidation coatings were rose, but when the thermal oxidation temperature rose from 600°C to 700°C, the micro-hardness of coating dropped from 575 HV to 505 HV. With the thermal oxidation temperature increasing, the numbers of micro-porous on coating surface was decreased, and the composite oxidation coating became more density.