Oxidation resistant tungsten carbide hardmetals

被引：26

作者：

Humphry-Baker, Samuel A. ^{[1
]}

Peng, Ke ^{[1
,2
]}

Lee, William E. ^{[1
]}

机构：

[1] Imperial Coll London, Dept Mat, Prince Consort Rd, London SW7 2BP, England

[2] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2017年 / 66卷

基金：

英国工程与自然科学研究理事会;

关键词：

Metal matrix composites; Weight loss; X-ray diffraction; SEM; Oxidation; TRANSITION-METAL SILICIDES; SILICON DIFFUSION COATINGS; GENERATION IV REACTORS; WC-CO; THERMAL-OXIDATION; CEMENTED CARBIDES; ALLOYS; HARD; BEHAVIOR; TEMPERATURE;

D O I：

10.1016/j.ijrmhm.2017.03.009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a new method for retarding the oxidation rate of hardmetals. By diffusion impregnating a WC-FeCr hardmetal with silicon, we manufacture two-layered silicide coatings consisting of an FeSix outer crust and WSi2 beneath. The structure results from a preferential reaction between silicon and the metallic binder. The FeSix outer layer is crucial to providing oxidation resistance as when exposed to oxygen it passivates, forming a protective SiO2 surface film - while simultaneously preventing exposure of the underlying WSi2, which is known to oxidise in an active manner. Our analysis shows the coating method is applicable to various hardmetals structures. (C) 2017 The Authors. Published by Elsevier Ltd.

引用

页码：135 / 143

页数：9

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