Tracer diffusion in ordered pseudo-binary multicomponent aluminides
Tracer diffusion in ordered pseudo-binary multicomponent aluminides
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DOI：
10.1016/j.scriptamat.2019.11.044
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发表时间：
2020-03
影响因子：
6
通讯作者：
M. G.;M. Vaidya;B. S. Murty;S. Divinski;G. Wilde
中科院分区：
文献类型：
--
作者：
M. G.;M. Vaidya;B. S. Murty;S. Divinski;G. Wilde
研究了有序赝二元多元铝化物的自扩散。对过渡金属在铝化物中的亚晶格进行等原子取代，得到Al（CoNi）、Al（FeNi）、Al（CoFe）、Al（CoFeNi）、Al（CoFeMnNi）和Al（CoCuFeMnNi）等多元合金。X射线衍射和电子显微镜证实了所有合金的单相有序体心立方结构的存在。用放射性同位素57Co、59Fe、54Mn、63Ni和65Zn测量了1273K时合金中的示踪扩散系数。过渡金属亚晶格的多主元素合金化对自扩散的影响映射到它对这些有序合金中的缺陷结构的影响。
Self-diffusion in ordered pseudo-binary multicomponent aluminides is investigated. Equiatomic substitution of transition metal sublattice in aluminides is performed to produce multicomponent alloys Al(CoNi), Al(FeNi), Al(CoFe), Al(CoFeNi), Al(CoFeMnNi) and Al(CoCuFeMnNi). X-ray diffraction and electron microscopy confirm the presence of single phase ordered BCC structure for all the alloys. Radioactive isotopes of57Co,59Fe,54Mn,63Ni and65Zn are used to measure the tracer diffusion coefficients in all the alloys at 1273 K. The influence of multi-principal element alloying of the transition metal sublattice on self-diffusion is mapped to its impact on the defect structure in these ordered alloys.