Chemical complexity induced local structural distortion in NiCoFeMnCr high-entropy alloy

IF 8.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Research Letters Pub Date : 2018-06-16 DOI:10.1080/21663831.2018.1478332

Fuxiang Zhang, Y. Tong, K. Jin, H. Bei, W. J. Weber, A. Huq, A. Lanzirotti, M. Newville, D. Pagan, J. Y. Ko, Yanwen Zhang

引用次数: 47

Abstract

ABSTRACT In order to study chemical complexity-induced lattice distortion in high-entropy alloys, the static Debye–Waller (D-W) factor of NiCoFeMnCr solid solution alloy is measured with low temperature neutron diffraction, ambient X-ray diffraction, and total scattering methods. The static atomic displacement parameter of the multi-element component alloy at 0 K is 0.035–0.041 Å, which is obvious larger than that of element Ni (∼ 0 Å). The atomic pair distance between individual atoms in the alloy investigated with extended X-ray absorption fine structure (EXAFS) measurements indicates that Mn has a slightly larger bond distance (∼0.4%) with neighbor atoms than that of others. GRAPHICAL ABSTRACT IMPACT STATEMENT The chemical complexity induced local structural disorder in the high entropy alloy is distinguished from the thermal contribution by the combination of neutron and X-ray techniques.

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化学复杂性诱导NiCoFeMnCr高熵合金的局部结构畸变

摘要为了研究高熵合金中化学复杂性引起的晶格畸变，采用低温中子衍射、环境x射线衍射和总散射等方法测量了NiCoFeMnCr固溶体合金的静态Debye-Waller (D-W)因子。多元素组份合金在0 K时的静态原子位移参数为0.035 ~ 0.041 Å，明显大于Ni元素(~ 0 Å)。用扩展x射线吸收精细结构(EXAFS)测量合金中单个原子之间的原子对距离表明，Mn与邻近原子的键距(~ 0.4%)略大于其他原子。通过中子和x射线技术的结合，将高熵合金中化学复杂性引起的局部结构紊乱与热贡献区分开来。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Research Letters Materials Science-General Materials Science

CiteScore

12.10

自引率

3.60%

发文量

审稿时长

3.3 months

期刊介绍： Materials Research Letters is a high impact, open access journal that focuses on the engineering and technology of materials, materials physics and chemistry, and novel and emergent materials. It supports the materials research community by publishing original and compelling research work. The journal provides fast communications on cutting-edge materials research findings, with a primary focus on advanced metallic materials and physical metallurgy. It also considers other materials such as intermetallics, ceramics, and nanocomposites. Materials Research Letters publishes papers with significant breakthroughs in materials science, including research on unprecedented mechanical and functional properties, mechanisms for processing and formation of novel microstructures (including nanostructures, heterostructures, and hierarchical structures), and the mechanisms, physics, and chemistry responsible for the observed mechanical and functional behaviors of advanced materials. The journal accepts original research articles, original letters, perspective pieces presenting provocative and visionary opinions and views, and brief overviews of critical issues.