热处理对CoNiCrAlY(Re)合金氧化行为的影响  

Influence of Heat-Treatment on Isothermal Oxidation Behavior of CoNiCrAlY(Re) Alloy

作　　者：兰昊[1] 杨志刚[1] 张玉朵[1] 张弛[1] 

机构地区：[1]清华大学新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《稀有金属材料与工程》2010年第7期1224-1229,共6页Rare Metal Materials and Engineering

基　　金：清华大学骨干人才支持计划研究资助;教育部留学中心留学回国基金资助

摘　　要：利用X射线衍射、扫描电镜和能谱分析研究了热处理前后的CoNiCrAlY(Re)合金在1000℃空气中的恒温氧化行为。结果表明:热处理有利于富铝相在合金中的均匀分布;热处理促进合金较快地进入稳定氧化阶段,且降低了合金的氧化速率;与不含Re的合金相比,含Re合金在初始氧化阶段具有较高的氧化增重及较快的亚稳态的θ-Al2O3向稳态的α-Al2O3相转变。Isothermal oxidation behavior of CoNiCrAlY（Re） alloy before and after heat-treatment at 1000 oC in air was investigated by X-ray diffraction,scanning microscopy and energy spectroscopy analysis. The results show that heat-treatment favors the homogeneous distribution of Al-rich phase in the alloy. Heat-treatment induces alloys to enter steady oxidation stage faster and lowers the oxidation rate. Compared with Re-undoped alloy,Re-doped alloy has higher oxidation mass gain during the initial oxidation stage and earlier phase transformation of alumina from metastable θ-Al2O3 to stable α-Al2O3.

关 键 词：CoNiCrAlY合金 RE 热处理 氧化行为 

分 类 号：TG166[金属学及工艺—热处理]