多弧离子镀Cr涂层对γ-TiAl合金高温氧化性能的影响  

Effect of Multi-Arc Ion Plating Chromium Films on the High Temperature Oxidation Resistance of γ-TiAl Alloy

作　　者：魏祥飞[1] 张平则[1] 魏东博[1] 周鹏[1] 张扬[1] 陈小虎[1] 王琼[1] 王若男[1] 

机构地区：[1]南京航空航天大学,江苏南京211100

出　　处：《稀有金属材料与工程》2014年第3期707-711,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51175247);江苏省研究生创新基金项目(CXZZZ11_0203);南京航空航天大学研究生创新基地(实验室)开放基金资(kfjj120123);中央高校基本科研业务费专项资金

摘　　要：采用多弧离子镀技术在γ-TiAl合金表面制备Cr涂层,用SEM/EDS和XRD等手段研究了该涂层对γ-TiAl合金在高温下氧化性能的影响。结果表明,涂层在高温下可形成保护性氧化膜,氧化膜主要分为内外两层,其中外层氧化膜在650℃下主要为Cr2O3,在750℃下为TiO2,在950℃为Al2O3,内层氧化膜均为Ti-Al-Cr的混合氧化膜,Ti-Al-Cr的互扩散层可有效阻止氧向基体扩散,显著提高了γ-TiAl的抗高温氧化能力。Chromium coatings were deposited on γ-TiAl alloy by multi-arc ion plating （MAIP）. The high temperature oxidation resistance of the coatings was tested by SEM, EDX and XRD. The results show that the coating at high temperature can form a protective oxide film. The oxide film is mainly divided into two layers. The outer part at 650℃ is Cr203, at 750℃ is TiO2 and at 950 ℃ is Al203. The inner oxide film is Ti-Al-Cr mixed oxide film. The Ti-Al-Cr diffusion layer can effectively prevent the diffusion of oxygen into the substrate, and thus significantly improve the γ-TiAl high-temperature oxidation resistance ability.

关 键 词：Γ-TIAL合金 多弧离子镀技术 Cr镀层 高温氧化中图法 

分 类 号：TG178.2[金属学及工艺—金属表面处理]