Graphene nanosheet/titanium carbide composites of a fine-grained structure and improved mechanical properties

被引：47

作者：

Liu, Xia ^{[1
]}

Li, Jianlin ^{[2
]}

Yu, Xiaowei ^{[1
]}

Fan, Hongwei ^{[1
]}

Wang, Qing ^{[1
]}

Yan, Shan ^{[1
]}

Wang, Lianjun ^{[1
]}

Jiang, Wan ^{[1
]}

机构：

[1] Donghua Univ, Coll Mat Sci & Engn, State Key Lab Modificat Chem Fibers & Polymer Mat, Shanghai 201620, Peoples R China

[2] Hainan Univ, Sch Mat & Chem Engn, Haikou 570228, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2016年 / 42卷 / 01期

关键词：

Grain boundaries; Mechanical properties; Graphene; Titanium carbide; FRACTURE-TOUGHNESS; MICROSTRUCTURE; SIZE; FABRICATION; STRENGTH;

D O I：

10.1016/j.ceramint.2015.08.071

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Dense graphene nanosheets (GNSs)/titanium carbide (TiC) composites have been produced from graphene oxide (G0)1TiC composite powders by spark plasma sintering. It is unexpected to observe that an introduction of 1.0 vol% GNSs from GO completely stops TiC grain growth by pinning their grain boundaries and densification is completed under the confinement of the flexible GNSs. Such a mechanism assumedly comes from the ultra-thin structure of GNSs, which indicates a crucial role GNSs may play in ceramic processing and has not been reported previously. Compared with monolithic TiC, the flexural strength of GNSs/TiC composites is significantly improved as a result of the refinement of matrix grains and excellent strength of GNSs, while the fracture toughness is enhanced due mainly to crack deflection, GNSs bridging and pull-out. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：165 / 172

页数：8

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