Pulsed electric current sintered Fe3Al bonded WC composites

被引：23

作者：

Huang, Shuigen ^{[1
]}

Van der Biest, Omer ^{[1
]}

Vleugels, Jef ^{[1
]}

机构：

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

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2009年 / 27卷 / 06期

关键词：

Intermetallic binder; Tungsten carbide; Pulsed electric current sintering; Grain growth; Mechanical properties; CO; DEFORMATION; TEMPERATURE; TOUGHNESS; STRENGTH; CARBIDES; HARDNESS; VC;

D O I：

10.1016/j.ijrmhm.2009.07.019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

WC based composites with 5, 10 and 20 vol.% Fe3Al binder were consolidated via pulsed electric current sintering (PECS) in the solid state for 4 min at 1200 degrees C under a pressure of 90 MPa. Microstructural analysis revealed a homogeneous Fe3Al binder distribution, ultrafine WC grains and dispersed Al2O3 particle clusters. The WC-5 vol.% Fe3Al composite combines an excellent Vickers hardness of 25.6 GPa with very high Young's modulus of 693 GPa, a fracture toughness of 7.6 MPa m(1/2) and flexural strength of 1000 MPa. With increasing Fe3Al binder content, the hardness and stiffness decreased linearly to 19.9 and 539 GPa, respectively with increasing binder content up to 20 vol.%, while the fracture toughness and flexural strength were hardly influenced by the binder content. Compared to WC-Co cemented carbides processed under exactly the same conditions, the WC-Fe3Al composites exhibit a substantially higher hardness and Young's modulus. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1019 / 1023

页数：5

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