| Role of chemical disorder in slowing down diffusion in complex concentrated alloys | |
Dai SC(戴仕诚)1,2; Yang, Yong3; Wang YJ(王云江)1,2
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| Corresponding Author | Yang, Yong([email protected]) ; Wang, Yun-Jiang([email protected]) |
| Source Publication | PHYSICAL REVIEW MATERIALS
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| 2024-03-26 | |
| Volume | 8Issue:3Pages:8 |
| ISSN | 2475-9953 |
| Abstract | The advent of multiprincipal element alloys (MPEAs) has sparked significant interest in physical metallurgy. These alloys, distinguished by their high configurational entropy aimed at minimizing free energy, have raised intriguing questions regarding the interplay of chemical disorder and chemical short-range order (CSRO) in kinetics of MPEAs. Particularly, the widely assumed phenomenon of sluggish diffusion has come under scrutiny. Here we employ atomistic simulations to quantitatively evaluate the impact of CSRO on diffusion in a representative medium -entropy alloy. We introduce a physical order parameter to establish a quantitative correlation between CSRO and diffusivity. Surprisingly, our simulations suggest that CSRO, rather than chemical disorder, serves to suppress and localize defect diffusion. The observed link between diffusion activation energy and CSRO provides a rationale for the observed deceleration in diffusion due to chemical ordering. A linear relationship between diffusion activation energy and activation entropy is unveiled, aligning with the Meyer-Neldel rule, and replicating experimental results. These insights help clarify the intricate role of chemical disorder in plastic deformation of chemically disordered materials. |
| DOI | 10.1103/PhysRevMaterials.8.033607 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001195783400001 |
| WOS Keyword | HIGH-ENTROPY ALLOYS ; SHORT-RANGE ORDER ; TRACER DIFFUSION ; SLUGGISH DIFFUSION ; CO |
| WOS Research Area | Materials Science |
| WOS Subject | Materials Science, Multidisciplinary |
| Funding Project | National Natural Science Foundation of China[12072344] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB0510301] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB0620103] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Research Grants Council (RGC), the Hong Kong Government through the General Research Fund (GRF)[CityU 11206362] ; Research Grants Council (RGC), the Hong Kong Government through the General Research Fund (GRF)[CityU 11201721] ; City University of Hong Kong[7005933] ; City University of Hong Kong[9610603] |
| Funding Organization | National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Research Grants Council (RGC), the Hong Kong Government through the General Research Fund (GRF) ; City University of Hong Kong |
| Classification | Q3 |
| Ranking | 1 |
| Contributor | Yang, Yong ; Wang, Yun-Jiang |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/94870 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China; 3.City Univ Hong Kong, Coll Engn, Dept Mech Engn, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China |
| Recommended Citation GB/T 7714 | Dai SC,Yang, Yong,Wang YJ. Role of chemical disorder in slowing down diffusion in complex concentrated alloys[J]. PHYSICAL REVIEW MATERIALS,2024,8,3,:8.Rp_Au:Yang, Yong, Wang, Yun-Jiang |
| APA | 戴仕诚,Yang, Yong,&王云江.(2024).Role of chemical disorder in slowing down diffusion in complex concentrated alloys.PHYSICAL REVIEW MATERIALS,8(3),8. |
| MLA | 戴仕诚,et al."Role of chemical disorder in slowing down diffusion in complex concentrated alloys".PHYSICAL REVIEW MATERIALS 8.3(2024):8. |
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