Structure and Growth Kinetics Features of Ceramic Coatings Produced on Ti-6Al-4V Alloy by Plasma Arc Oxidation
Ceramic coatings were fabricated by plasma arc oxidation on Ti-6Al-4V alloy in phosphate -containing solution.The growth rate,microstructure and phase composition of ceramic coatings were investigated using coating thickness gauge,scanning electron microscope (SEM) and X-Ray diffraction (XRD).After plasma arc oxidation treatment,the microstructure of the remained Ti-6Al-4V alloy substrate remains unchanged and no hardening zone in the substrate is found.Ceramic coating formed on Ti-6Al-4V alloy surface by alternating-current plasma arc oxidation contains two layers:an outer layer and an inner layer.The outer layer coating consists of a large amount of futile and a little anatase.But in the inner layer,anatase becomes a main phase while the rutile fraction obviously decreases,which indicates that phase transformation of anatase into rutile occurs in the duration of oxidizing process.In the mean time,with increasing treatment duration,coating growth varies from rapidness to tardiness accompanied by gradually roughening in appearance.
Plasma arc oxidation Phase composition Titanium alloy Ceramic Coating
Shuhua Li Shen Wang Yujun Yin Kai Sun Chengwei Tan
Ordnance Engineering College,Shijiazhuang 050003,China;Beijing Institute of Technology,Beijing 10008 Beijing Institute of Technology,Beijing 100081,China Ordnance Engineering College,Shijiazhuang 050003,China
国际会议
The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))
厦门
英文
1036-1039
2011-11-04（万方平台首次上网日期，不代表论文的发表时间）