Microstructure and mechanical properties of SiC-nanowire-augmented tungsten composites

被引：29

作者：

Lee, Dongju ^{[1
]}

Park, Heesub ^{[1
]}

Ryu, Hojin ^{[2
]}

Jeon, Seokwoo ^{[1
]}

Hong, Soonhyung ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Taejon 305701, South Korea

[2] Korea Atom Energy Res Inst, DUPIC, Taejon 305353, South Korea

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 37期

关键词：

Metal matrix composites; Powder metallurgy; Sintering; Microstructure; Mechanical properties; METAL-MATRIX COMPOSITES; INTERFACIAL REACTIONS; SILICON-CARBIDE; SPARK PLASMA;

D O I：

10.1016/j.jallcom.2011.06.005

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effect of an addition of SiC nanowire on the microstructure and mechanical properties of tungsten-based composites is investigated in this study. SiC-nanowire-augmented tungsten composites were prepared by a spray-drying process and an in situ spark plasma sintering process. Three distinctive reaction phases, tungsten, tungsten carbide (W(2)C) and rod-type tungsten silicide (W(5)Si(3)) were formed during the sintering process. The flexural strength was significantly increased from 706 MPa to 924 MPa in tungsten composites augmented with SiC nanowires, as was the formation of W(2)C and W(5)Si(3) phases. The rod-type W(5)Si(3) bears significant stress by both sharing a portion of the load and providing a bridging mechanism. Furthermore, a high ablation resistance at an elevated temperature was observed for tungsten composites augmented with SiC nanowires. (C) 2011 Elsevier B. V. All rights reserved.

引用

页码：9060 / 9064

页数：5

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