多弧离子镀Cr_2O_3涂层对γ-TiAl抗氧化性能的影响  

EFFECT OF MULTI ARC ION PLATED CHROMIA COATING ON OXIDATION BEHAVIOR OF γ-TiAl

作　　者：程玉贤[1] 王文[1] 朱圣龙[1] 王福会[1] 

机构地区：[1]中国科学院金属研究所金属腐蚀与防护国家重点实验室,沈阳110016

出　　处：《腐蚀科学与防护技术》2009年第3期266-268,共3页Corrosion Science and Protection Technology

摘　　要：用多弧离子镀技术在γ-TiAl金属间化合物表面制备了Cr2O3涂层,用SEM/EDX线扫描分析等手段研究了该涂层在900℃下的循环氧化行为.结果表明,γ-TiAl表面沉积Cr2O3涂层后,明显提高了γ-TiAl的抗循环氧化能力;在氧化过程中TiAl/Cr2O3界面处的低氧压促进了Al的选择性氧化,在TiAl一侧生成了一层富Al氧化物,该层富Al氧化物较好地阻止了TiAl中Ti的外扩散,从而抑制了TiO2的生长.A chromia coating was deposited on γ-TiA1 surface by means of multi arc ion plating. The ehro- mia coating was strongly adherent to the γ-TiA1 substrate. The coating could also enhance the oxidation resistance of the γ-TiA1 substrate during oxidation test at 900℃ in air. Characterization of the deposited coating before and after oxidation indicated that growth of an aluminum-rich oxide layer at the coatinge/substrate interface occurred. The continuous aluminum-rich oxide layer retarded the outward diffusion of titanium and therefore suppressed the growth of TiO2.

关 键 词：CR2O3 多弧离子镀 氧化 Γ-TIAL 

分 类 号：TG172.82[金属学及工艺—金属表面处理]