VC, Cr3C2 and NbC doped WC-Co cemented carbides prepared by pulsed electric current sintering

被引：89

作者：

Huang, S. G.

Li, L.

Vanmeensel, K.

Van der Biest, O.

Vleuges, J.

机构：

[1] Katholieke Univ Leuven, Dept Met & Mat Engn, B-3001 Heverlee, Belgium

[2] Shanghai Univ, Sch Mat Sci & Engn, Shanghai 200072, Peoples R China

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2007年 / 25卷 / 5-6期

基金：

中国国家自然科学基金;

关键词：

WC-Co cemented carbide; grain growth inhibitor; solid state sintering; SPS; hardness; fracture toughness;

D O I：

10.1016/j.ijrmhm.2006.11.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

WC-12 wt.% Co grade cemented carbides doped with 0.9 wt.% VC, NbC or Cr3C2 grain growth inhibitor were consolidated by pulsed electric current sintering (PECS), also known as spark plasma sintering (SPS), in the solid state at 1240 degrees C for 2 min. The microstructure and properties of the PECS material grades are compared with those of pressureless sintered grades, liquid phase sintered at 1420 degrees C for I h. Microstructural and hardness characterization revealed that both the chemical composition and sintering technique play an important role on the WC grain growth and final mechanical properties. To obtain a nanometer sized WC-Co microstructure, it is essential to carefully select the grain growth inhibitor in addition to the application of a fast thermal densification cycle by means of spark plasma sintering. (C) 2006 Elsevier Ltd. All rights reserved.

引用

页码：417 / 422

页数：6

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