基于表面生物学改性的钛合金微弧氧化陶瓷层研究

Study of Microarc Oxidation Ceramic Coatings Formed on Titanium Alloy based on Biological Treatment

采用微弧氧化法于(CH3COO)2Ca-CaC3H5(OH)2PO4溶液中制备了富含Ca、P成分的钛合金微弧氧化陶瓷层,研究了陶瓷层中的相结构、Ca和P的分布、电压与电流密度对Ca和P在膜层中分布的影响。结果表明,陶瓷层主要由金红石型和锐钛矿型TiO2及非晶相组成;沿膜层由表及里,Ca在膜层的含量分布呈现类似二次曲线递减趋势,P在膜层中的含量则大体均匀,但在膜基交界面迅速降为零。随着电压或电流密度的升高,膜层中Ca、P相对含量增大,Ca的增长速度远快于P,使得Ca、P的摩尔比随电压的升高而增大。

Ceramic oxide coatings containing Calcium and Phosphorous were formed on titanium alloy in （CH3COO）2Ca-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.