Study of Microarc Oxidation Ceramic Coatings Formed on Titanium Alloy based on Biological Treatment
Ceramic oxide coatings containing Calcium and Phosphorous were formed on titanium alloy in(CH3COO)2 Ca-CaC3H5(OH)2PO4 solution by micro-arc oxidation.The phase construction of the coatings and the effects of electric parameter including voltage,current density on Calcium,Phosphorous component and their distribution of the coatings were studied.The results show: the coatings are composed mainly of rutile TiO2,anatase TiO2 and amorphous phase.From surface to inner,Calcium content decrease gradually in the method of a conic and Phosphorous content remain stabilized in the coating but decrease quickly to zero in the coating-substrate interface.With voltage or current density increasing,Calcium and Phosphorous comparative content increases,but Calcium increases more quickly than Phosphorous,leading to the increasing of Ca/P atom ratio with the increasing of voltage or current density.