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.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
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
