通过原位形成界面AlMo在少层MoS增强的铝基复合材料中平衡强度和延展性

Balancing Strength and Ductility in Al Matrix Composites Reinforced by Few-Layered MoS through In-Situ Formation of Interfacial AlMo.

作者信息

Fan Lewen, Yang Lizhuang, Zhao Dongdong, Ma Liying, He Chunnian, He Fang, Shi Chunsheng, Sha Junwei, Zhao Naiqin

机构信息

School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials, Tianjin University, Tianjin 300350, China.

Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300350, China.

出版信息

Materials (Basel). 2021 Jun 25;14(13):3561. doi: 10.3390/ma14133561.

DOI:10.3390/ma14133561

PMID:34202145

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8269559/

Abstract

In this work, few-layered MoS (FLM) nanosheet-reinforced Al matrix composites are developed through powder metallurgy and hot extrusion. The microstructure, mechanical properties, and strengthening mechanisms have been systematically investigated. It is found that AlMo and AlS can be formed in-situ during the sintering process, resulting in the improvement of interfacial bonding between FLM and Al matrix. With 1.5 wt.% of FLM addition, an improved tensile strength of 234 MPa with a high elongation of 17% can be obtained. Moreover, the strengthening mechanisms are also demonstrated to be grain refinement, dislocation strengthening, and load transfer, and the calculation indicates that load transfer is the main contribution factor. This work will inspire more new designs of metal matrix composites with balanced strength and ductility.

摘要

在这项工作中，通过粉末冶金和热挤压制备了少层MoS（FLM）纳米片增强铝基复合材料。对其微观结构、力学性能和强化机制进行了系统研究。研究发现，在烧结过程中可原位形成AlMo和AlS，从而改善了FLM与铝基体之间的界面结合。添加1.5 wt.%的FLM时，可获得234 MPa的抗拉强度和17%的高伸长率。此外，强化机制还包括晶粒细化、位错强化和载荷传递，计算表明载荷传递是主要贡献因素。这项工作将激发更多具有强度和延展性平衡的金属基复合材料的新设计。