In-situ SR-CT experimental study on rapid densification mechanisms of SiCw/Al composites: Orientation and structural arrangement of whisker

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing Pub Date : 2025-04-22 DOI:10.1016/j.compositesa.2025.108975

Yuanjie Wang, Yu Xiao, Yulong Li, Xiaofang Hu, Feng Xu

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引用次数: 0

Abstract

For Al matrix composites, SiC whiskers (SiC_w), as reinforcement, have a better ability to improve the strength and toughness of the material than particles. However, the current mechanical properties of SiC_w/Al composites are still not up to expectations because of more complex factors such as whisker orientation and structure distribution. The key to achieve mechanical property optimization and breakthrough is to understand the relationship among the external field energy, microstructure and sintering process during the preparation of materials. In the present paper, the whole process of SiC_w/Al composites microstructure evolution was observed accurately by in situ SR-CT experiment during microwave rapid sintering process. It was revealed that the densification effect of the sample was obviously better than that when the SiC whisker and Al particle neck are perpendicular to each other. It was found that the when the SiC whiskers located in the neck of Al particles were cross-distributed, the matrix density increased more. The angle between the cross-arranged whiskers had a key influence on the densification process of the material. It provided more understanding for the preparation of high performance SiC_w/Al composites and raised the possibility for the preparation of more functional materials.

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SiCw/Al复合材料快速致密化机理的原位SR-CT实验研究：晶须取向与结构排列

对于Al基复合材料，SiC晶须（SiCw）作为增强材料，比颗粒具有更好的提高材料强度和韧性的能力。然而，由于晶须取向和组织分布等复杂因素的影响，目前SiCw/Al复合材料的力学性能仍未达到预期。了解材料制备过程中外场能、微观结构和烧结过程之间的关系是实现力学性能优化和突破的关键。本文通过原位SR-CT实验，准确观察了微波快速烧结过程中SiCw/Al复合材料微观组织演变的全过程。结果表明，SiC晶须与Al颗粒颈垂直时的致密化效果明显好于SiC晶须与Al颗粒颈垂直时的致密化效果。结果表明，当位于Al颗粒颈部的SiC晶须呈交叉分布时，基体密度增大较大。交叉排列的晶须之间的角度对材料的致密化过程有关键影响。这为高性能SiCw/Al复合材料的制备提供了更多的认识，并为制备更多功能材料提供了可能性。

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

Composites Part A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.