原位制备强韧的 MgAl2O4/Al 基复合材料

IF 6.5 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications Pub Date : 2024-10-10 DOI:10.1016/j.coco.2024.102115

Tong Gao, Jingyi Hu, Chunxiao Li, Guiliang Liu, Xiangfa Liu

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引用次数: 0

摘要

Al-Mg-B₂O₃ 复合材料是通过球磨、烧结和热挤压相结合的方法合成的，原位形成的 MgAl₂O₄ 和 MgAlB₄ 颗粒沿晶界分布。铝-5Mg-10B₂O₃复合材料显示出优异的机械性能，包括 535 兆帕的屈服强度、558 兆帕的极限拉伸强度、88.8 千兆帕的杨氏模量和 2.84 克/立方厘米的密度。对强化机制进行了分析，发现位错强化作用最大，主要是由于形成了 MgAl₂O₄纳米颗粒。

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In-situ fabrication of a strong and stiff MgAl2O4/Al-based composite

The Al-Mg-B₂O₃ composites were synthesized via a combination of ball-milling, sintering, and hot extrusion, with in-situ formed MgAl₂O₄ and MgAlB₄ particles distributing along grain boundaries. The Al-5Mg-10B₂O₃ composite demonstrated exceptional mechanical properties, including a yield strength of 535 MPa, ultimate tensile strength of 558 MPa, Young's modulus of 88.8 GPa, and a density of 2.84 g/cm³. The strengthening mechanisms were analyzed, with dislocation strengthening contributing most, primarily due to the formation of MgAl₂O₄ nanoparticles.

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来源期刊

Composites Communications Materials Science-Ceramics and Composites

CiteScore

12.10

自引率

10.00%

发文量

340

审稿时长

36 days

期刊介绍： Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.