中熵合金化学近程序的结构基序

IF 8.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Letters Pub Date : 2022-02-01 DOI:10.1080/21663831.2022.2029607

Xuefei Chen, F. Yuan, Hao Zhou, Xiaolei Wu

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引用次数: 19

摘要

化学短程有序（CSRO）是高/中熵合金（H/MEA）中固有的亚纳米尺寸实体。辨别CSRO带来了一个悬而未决的问题，即在电子衍射的哪个区轴下，CSRO特有的特征散射将出现，以及CSRO的结构基序是什么。在这里，我们展示了CSRO在VCoNi MEA中从[111]和[112]方向的额外漫散射，并相应地构建了-型结构基序，并根据变区轴下的衍射，导出了CSRO平面长方体的空间形状。此外，我们还演示了在晶格图像中识别CSRO的方法。图形摘要影响声明根据多区轴下的电子衍射，结构基序被构造为中熵合金中化学短程有序的-型。

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Structure motif of chemical short-range order in a medium-entropy alloy

The chemical short-range orders (CSRO) are the sub-nanosized entities inherent in high-/medium-entropy alloys (H/MEA). To discern CSRO poses the challenge with pending issues as to under what zone axis in electron diffraction, signature scattering specific to CSRO will appear and what the structure motif of CSRO is. Here, we show extra diffuse scattering by CSRO from [111] and [112] directions in a VCoNi MEA and accordingly, construct the -type structure motif, and derive the spacial shape of flat cuboid of CSRO in virtue of diffractions under varying zone axis. Moreover, we demonstrate the methods to identify CSRO in lattice images. GRAPHICAL ABSTRACT IMPACT STATEMENT The structure motif is constructed as -type for chemical short-range order in a medium-entropy alloy in terms of electron diffractions under the multiple zone axis.

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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.