Synergistic strengthening effect of titanium matrix composites reinforced by graphene oxide and carbon nanotubes

被引：49
作者：
Wei, Liangxiao [1 ]
Liu, Xuyang [1 ]
Gao, Youzhi [1 ]
Lv, Xuewei [2 ]
Hu, Ning [3 ]
Chen, Min [4 ]
机构：
[1] Chongqing Univ, Coll Aerosp Engn, Chongqing 400044, Peoples R China
[2] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China
[3] Hebei Univ Technol, Sch Mech Engn, Tianjin 300401, Peoples R China
[4] Panzhihua Univ, Coll Titanium & Vanadium, Panzhihua 617000, Sichuan, Peoples R China
来源：
MATERIALS & DESIGN | 2021年 / 197卷
基金：
中国国家自然科学基金;
关键词：
Titanium matrix composites; Carbon nanotubes; Graphene oxide; Dispersion; Synergistic strengthening;
D O I：
10.1016/j.matdes.2020.109261
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Titanium matrix composites reinforced by graphene oxide (GO) and carbon nanotube (CNT) were successfully prepared by hot-pressing sintering. The effect of GO content on dispersion and particle size of CNT was analysed. In addition, the microstructure, phase structure and mechanical properties of Ti/GO-CNT composites were characterized, and the synergistic strengthening mechanism was investigated. The results show that dispersion of CNT can be significantly improved by adding GO. TiC particles with size of 100-200 nm are formed in situ between matrix and reinforcements. CNT and GO still partly keep an integrated structure after sintering. A significant synergetic effect was observed between GO and CNT that improved the mechanical properties of the composite. The maximum hardness and yield strength of the composite were 771.5 HV and 1387.1 MPa, which is 150% and 74% higher than that of pure Ti when the GO/CNT ratio is 5:1. The synergistic strength enhancement reaches a maximum when GO/CNT ratio is 1:1. (C) 2020 The Authors. Published by Elsevier Ltd.
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页数：10
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