Zr diffusion in BCC refractory high entropy alloys: A case of 'non-sluggish' diffusion behavior

被引：52
|
作者：
Zhang, Jingfeng [1 ]
Gadelmeier, Christian [2 ]
Sen, Sandipan [1 ]
Wang, Rui [3 ]
Zhang, Xi [4 ]
Zhong, Yu [3 ]
Glatzel, Uwe [2 ]
Grabowski, Blazej [4 ]
Wilde, Gerhard [1 ]
Divinski, Sergiy, V [1 ]
机构：
[1] Univ Munster, Inst Mat Phys, Wilhelm Klemm Str 10, D-48149 Munster, Germany
[2] Univ Bayreuth, Met & Alloys, Prof Rudiger Bormann Str 1, D-95447 Bayreuth, Germany
[3] Worcester Polytech Inst, Dept Mech Engn, 100 Inst Rd, Worcester, MA 01609 USA
[4] Univ Stuttgart, Inst Mat Sci, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
来源：
ACTA MATERIALIA | 2022年 / 233卷
关键词：
Diffusion; Refractory high-entropy alloy; HfNbTaTiZr; HfNbTiVZr; BCC crystalline lattice; GROUP-IV METALS; TRACER DIFFUSION; PHONON-DISPERSION; OXIDATION RESISTANCE; SELF-DIFFUSION; PHASE; HF; NB; MICROSTRUCTURE; INSTABILITY;
D O I：
10.1016/j.actamat.2022.117970
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Single phase (BCC solid solution) HfTiZrNbTa and HfTiZrNbV refractory high entropy alloys are synthesized and characterized. For the first time for BCC refractory high entropy alloys, tracer diffusion is measured using the short-living radioactive isotope Zr-89 in the temperature range of 1123 to 1423 K. A 'non-sluggish' diffusion behavior is clearly observed, highlighted by an enhancement of the measured diffusion rates with respect to the geometric mean of the diffusivities in the corresponding pure elements. The factors influencing self-diffusion in BCC multi-principal element alloys are discussed, including the chemical complexity, atomic size mismatch and the phonon broadening. (C) 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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页数：9
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