有效扩散系数
热力学
示踪剂
微观结构
热扩散率
晶界
晶格扩散系数
作者
Jingfeng Zhang,G. Mohan Muralikrishna,Alex Asabre,Yordan Kalchev,Julian Müller,Benjamin Butz,Sven Hilke,Harald Rösner,Guillaume Laplanche,Sergiy V. Divinski,Gerhard Wilde
标识
DOI:10.1016/j.actamat.2020.116498
摘要
Abstract: A single Cr-rich σ-phase alloy with a composition of Co17Cr46Fe16.3Mn15.2Ni5.5 (at.%) and a tetragonal lattice structure was produced. The tracer diffusion coefficients of Ni and Fe were measured by secondary ion mass spectroscopy using the highly enriched 64Ni and 58Fe natural isotopes. On the homologous temperature scale, Ni and Fe diffuse in the σ phase faster as compared to the corresponding diffusion rates in the equiatomic and face-centered cubic CoCrFeMnNi alloy. In contrast, on the absolute temperature scale, these elements diffuse roughly at the same rates in both materials. Factors influencing element diffusion and phase stability of the σ phase compared to the equiatomic alloy are discussed.
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