High Temperature Ozidation Behavior of Titanium Coated by Cathodic Microarc Electrodeposition
Cathodic microarc electrodeposition is a new method to produce oxide coatings on conductive materials. In this paper, an alumina coating up to 80 μm was fabricated on pure titanium by cathodic microarc electrodeposition technique in 0.4 mol/l Al(NO3)3 ethanol solution. The oxidation behaviors of the titanium and coated titanium were evaluated by isothermal oxidation at 973 K in air. Their microstructure, composition and phase constituents after 100 h oxidation test were analyzed by scanning electron microscope (SEM) and X-Ray diffraction (XRD). It is found that the oxidation rate of the coated titanium reduces about 4 times at 973 K. Isothermal oxidation. After oxidation test, the phase constituents of alumina coating hardly change, in which the coating consists of Y-Al2O3 and little a-Al2O3 phases. A thin dense alumina layer close to the coating/titanium substrate played a key role on suppressing the O and Ti diffusion during the isothermal oxidation. The cathodic microarc electrodeposition was an effective method to improve the oxidation resistance of titanium.
cathodic microarc electrodeposition high temperature ozidation titanium alumina coating
XUE Wen-bin JIN Qian ZHU Qing-zhen
Key Laboratory for Beam Technology and Materials Modification of Ministry of Education,College of Nu Key Laboratory for Beam Technology and Materials Modification of Ministry of Education,College of Nu Key Laboratory for Beam Technology and Materials odification of Ministry of Education,College of Nuc
国际会议
The Fourth Asian Conference on Heat Treatment and Surface Engineering(第四届亚洲热处理及表面工程大会)
北京
英文
604-607
2009-10-27（万方平台首次上网日期，不代表论文的发表时间）