Fracture toughness and toughening mechanisms in graphene platelet reinforced Si3N4 composites

被引：211

作者：

Kvetkova, Lenka ^{[1
]}

Duszova, Annamaria ^{[1
]}

Hvizdos, Pavol ^{[1
]}

Dusza, Jan ^{[1
]}

Kun, Peter ^{[2
]}

Balazsi, Csaba ^{[2
]}

机构：

[1] Slovak Acad Sci, Inst Mat Res, Kosice, Slovakia

[2] Res Inst Tech Phys & Mat Sci, Ceram & Nanocomposites Dept, H-1525 Budapest, Hungary

来源：

SCRIPTA MATERIALIA | 2012年 / 66卷 / 10期

关键词：

Ceramix matrix composites; GPLs; Toughness; Fracture;

D O I：

10.1016/j.scriptamat.2012.02.009

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Silicon nitride + 1 wt.% graphene platelet composites were prepared using various graphene platelets with the aim to improve the fracture toughness of Si3N4. The fracture toughness was significantly higher for all composites in comparison to the monolithic Si3N4, with the highest value of 9.92 MPa m(0.5). The main toughening mechanisms originated from the presence of graphene platelets, and the increase in the fracture toughness values was attributable to crack deflection, crack branching and crack bridging. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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页码：793 / 796

页数：4

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