摘要
研究了溅射Ｔｉ５０Ａｌ１０Ｃｒ及Ｔｉ５０Ａｌ２０Ｃｒ涂层对Ｔｉ２４Ａｌ１４Ｎｂ３Ｖ抗高温氧化性能的影响。结果表明，在８００℃下，Ｔｉ５０Ａｌ１０Ｃｒ及Ｔｉ５０Ａｌ２０Ｃｒ涂层表面由于可形成粘附性良好的Ａｌ２Ｏ３膜，大大改善了Ｔｉ２４Ａｌ１４Ｎｂ３Ｖ的抗高温氧化性能。９００℃时在Ｔｉ５０Ａｌ１０Ｃｒ涂层表面长出大量ＴｉＯ２，导致其氧化增重较大；而在Ｔｉ５０Ａｌ２０Ｃｒ涂层表面生成了连续Ａｌ２Ｏ３，其抗氧化性能良好。然而，由于ＴｉＡｌＣｒ涂层与基体热膨胀系数不同，在循环氧化过程中涂层出现一些裂纹，导致其抗循环氧化性能有所下降。
The effect of sputtered Ti50Al10Cr and Ti50Al20Cr
coatings on oxidation resistance of Ti24Al14Nb3V in static air at 800900 was studied .The
uncoated TiAl alloys showed poor resistance due to the formation of porous mixed
Al2O3+TiO2+AlNbO4 scale. The Ti50Al10Cr and Ti50Al20Cr coatings could remarkably improve
the oxidation resistance of Ti24Al14Nb3V due to the formation of protective Al2O3 layer. A great
deal of TiO2 appeared on the Ti50Al10Cr coating , which led to great mass gain at high
temperatures. Both coatings cracked during cyclic oxidation due to the difference of thermal
expansion coefficients between the TiAlCr coatings and the substrate.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
1999年第2期247-252,共6页
The Chinese Journal of Nonferrous Metals
基金
国家"八六三"计划资助
国家杰出青年基金
