柱状晶界面对溅射NiAl微晶涂层高温氧化性能的影响  

EFFECT OF COLUMNAR MICROSTRUCTURE OF NiAl MICROCRYSTALLINE COATING ON ITS OXIDATION BEHMIORS

作　　者：杨松岚[1] 王福会[1] 朱圣龙[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：《金属学报》2001年第6期625-627,共3页Acta Metallurgica Sinica

基　　金：国家杰出青年基金资助项目59625103;"863"资助项目715-011-012

摘　　要：利用 ＴＧＡ， ＳＥＭ对 ＮｉＡｌ微晶的涂层在空气中１０００℃恒温及循环氧化过程中柱状晶界面所起的作用进行了研究． 结果发现，柱状晶界面微孔在氧化初期作为自由表面严重影响了初始氧化动力学，同时柱状晶界面氧化物微钉的形成大大提高了氧 化膜的粘附性建立了基于柱状晶界面的附加自由表面数学模型．The effect of columnar microstructure of sputtered NiAl micro crystalline coating on its isothermal and cyclic oxidation behaviors at 1000 degreesC in air was investigated by TGA, and SEM. Results indicate that micro-voids existing in the columnar interface as an additional free surface play an important role in the initial oxidation kinetics, and the scale adhesion was improved by the way of forming micropegs in the columnar interfaces. A simple model concerning the additional free surface due to the existence of columnar interfaces is proposed.

关 键 词：NiAl微晶涂层 柱状晶界面 高温氧化 

分 类 号：TG172.82[金属学及工艺—金属表面处理] TG174.44[金属学及工艺—金属学]