N离子注入对Ti-Al-Zr合金耐蚀性影响研究  

A Study of Effect of Nitrogen Implantation on Corrosion Properties of Ti-Al-Zr Alloy

作　　者：刘彦章[1] 邱绍宇[2] 祖小涛[1] 王理[2] 黄新泉[2] 

机构地区：[1]电子科技大学应用物理系,四川成都610054 [2]中国核动力研究设计院核燃料及材料国家级重点实验室,四川成都610041

出　　处：《原子核物理评论》2006年第2期202-206,共5页Nuclear Physics Review

摘　　要：经完全退火处理的Ti-A l-Zr合金表面注入不同剂量的N离子,并在pH值为10的溶液中进行电化学腐蚀试验。结果表明,N离子注入后,试样表面首先形成具有四方结构的-εTi2N,随着离子注入剂量的增加,四方结构的-εTi2N逐渐向立方结构的σ-TiN转变,X射线光电子能谱的分析结果也证实了这一变化过程;N离子的注入能明显改善Ti-A l-Zr合金表面的耐腐蚀性能,且在注入8×1016ion/cm2时得到最佳的耐腐蚀性。根据原子碰撞理论对电化学腐蚀实验结果进行了理论分析。In the present investigation, fully annealed Ti-Al-Zr plates were implanted with different nitrogen fluences. The corrosion resistance was examined by the electrochemical methods in a solution with pH value of 10 at room temperature in order to determine the optimum fluenee that can give good corrosion resistance in a simulated nuclear reactor condition. The results show ε-Ti2N phase formed initially and then transformed into σ-TIN with increasing of nitrogen fluences, which was confirmed by the results of X-ray photoelectron spectroscopy （XPS）. In addition, it can be found the increase of the corrosion resistance depends on the nitrogen fluence employed and the maximum improvement of the corrosion resistance was observed with a fluence of 8 × 10^16 N^＋ ion/cm^2. The mechanism of the corrosion resistance is attributed to defect accumulation, formation of amorphous phase and nanocrystallization in the implanted layer.

关 键 词：Ti-Al-Zr合金 N离子注入 相结构 耐蚀性 

分 类 号：TG174[金属学及工艺—金属表面处理]