合金
Laves相
材料科学
高熵合金
腐蚀
内氧化
动力学
金属
冶金
扩散
高温腐蚀
热力学
金属间化合物
物理
量子力学
作者
Dong Huang,Jiashen Lu,Yanxin Zhuang,Chunxu Tian,Yibo Li
标识
DOI:10.1016/j.corsci.2019.07.012
摘要
The high temperature oxidation behavior of CoCrFeMnNbxNi high-entropy alloys in air was studied. As-cast CoCrFeMnNb0.25Ni alloy is a duplex-phase structure of FCC plus Laves phase. The oxidation kinetics of alloys followed parabolic rate law and the corresponding oxidation rate constants were calculated. In the oxidation process, Nb plays a dual role: On the one hand, the new Laves phase at the oxidation scale/alloy interface hinders the outward diffusion of active metal cations and improves the oxidation resistance; On the other hand, the Laves phase inside the alloy becomes the channel for oxygen ions to diffuse inward and forms internal oxidation.
科研通智能强力驱动
Strongly Powered by AbleSci AI