Size dependent, anisotropic deformation behaviors of Fe-SiOC columnar nanocomposites

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Scripta Materialia Pub Date : 2025-06-21 DOI:10.1016/j.scriptamat.2025.116833

Jian Song, Bingqiang Wei, Jian Wang

引用次数: 0

Abstract

Fe-SiOC nanocomposites with core-shell (crystal-amorphous) columnar structures exhibit size dependent, anisotropic mechanical properties. When loading along the columns, the yield strength of Fe-SiOC increases from 2.6 GPa to 3.5 GPa as the column diameter decreases from ∼14.0 nm to ∼3.7 nm. In contrast, the yield strength of Fe-SiOC decreases from 3.1 GPa to 2.5 GPa when the loading is perpendicular to the columns. Combining with transmission electron microscope (TEM) analysis, the anisotropic mechanical properties were attributed to the size-dependent transition of deformation mechanisms from co-deformation (Fe and SiOC) to grain boundaries mediated cracking.

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Fe-SiOC柱状纳米复合材料尺寸相关的各向异性变形行为

具有核-壳（晶-非晶）柱状结构的Fe-SiOC纳米复合材料表现出尺寸相关的各向异性力学性能。当沿柱加载时，Fe-SiOC的屈服强度从2.6 GPa增加到3.5 GPa，柱径从~ 14.0 nm减小到~ 3.7 nm。相反，当载荷垂直于柱时，Fe-SiOC的屈服强度从3.1 GPa下降到2.5 GPa。结合透射电镜（TEM）分析，各向异性力学性能归因于变形机制的尺寸依赖转变，从共变形（Fe和SiOC）到晶界介导的开裂。

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

Scripta Materialia 工程技术-材料科学：综合

CiteScore

11.40

自引率

5.00%

发文量

581

审稿时长

34 days

期刊介绍： Scripta Materialia is a LETTERS journal of Acta Materialia, providing a forum for the rapid publication of short communications on the relationship between the structure and the properties of inorganic materials. The emphasis is on originality rather than incremental research. Short reports on the development of materials with novel or substantially improved properties are also welcomed. Emphasis is on either the functional or mechanical behavior of metals, ceramics and semiconductors at all length scales.