摘要
采用扫描电子显微镜和X射线衍射分析仪研究了1100℃下Ni-22Cr-20Co-18W合金氧化膜的演变规律。结果显示,在氧化初始阶段,表面形成了Cr2O3,NiO和(Co,Ni,Mn,Cr)3O4混合氧化膜,后者为M3O4型氧化物。长时间氧化后,氧化膜由单层转变为双层,在内层形成连续的Cr2O3膜,在外层形成可以抑制内层Cr2O3挥发的致密NiO氧化膜;同时氧化空位在氧化膜与合金基体界面处形成,并且Al元素的内氧化也在该处发生。
Evolution of oxidation scale for a Ni-22Cr-20Co-18W alloy at 1100 ℃ was investigated by means of XRD and SEM （EDS） The results show that at the initial stage of the oxidation, a oxide scale of the mixture of Cr2O3, NiO and （Ni, Co, Mn, Cr）3O4, which is of M3O4 type, is formed on the surface. The single-layer oxide film changes into double layer one after long time oxidation, the sequential Cr2O3 scale forms at the inner layer, and the outer NiO scale could effectively retard the volatilization of the inner Cr2O3 scale; the voids are formed at the scale/alloy interface and inner oxidation of Al element is observed at the same time
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2012年第3期486-489,共4页
Rare Metal Materials and Engineering
基金
新世纪优秀人才计划(08GE1213)
