Microstructure and mechanical properties of WC or Mo2C modified NbC-Ni cermets

被引：25

作者：

Huang, J. H. ^{[1
]}

Huang, S. G. ^{[1
]}

Zhou, P. ^{[2
]}

Lauwers, B. ^{[3
,4
]}

Qian, J. ^{[3
,4
]}

Vleugels, J. ^{[1
]}

机构：

[1] Katholieke Univ Leuven, Dept Mat Engn, Leuven, Belgium

[2] Hunan Univ Sci & Technol, Hunan Prov Key Def Lab High Temp Wear Resisting M, Changsha, Hunan, Peoples R China

[3] Katholieke Univ Leuven, Dept Mech Engn, Leuven, Belgium

[4] Flanders Make, Leuven, Belgium

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2021年 / 95卷

关键词：

Niobium carbide; Cermets; Liquid phase sintering; Microstructure; Mechanical properties; GRAIN-GROWTH; PHASE; FRACTURE;

D O I：

10.1016/j.ijrmhm.2020.105440

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, the influence of up to 15 vol% WC or Mo2C addition to Ni bonded NbC matrix cermets, prepared by pressureless liquid phase sintering in vacuum for 90 min at 1390 degrees C was assessed. The constituent phases and W/Mo dissolution in the Ni binder and NbC phases were simulated by thermodynamic modelling. Microstructure and phase analysis using XRD and SEM indicated that the WC or Mo2C modified NbC based cermets were composed of a (Nb,W)C or (Nb,Mo)C solid solution cubic phase dispersed in a cubic Ni alloy binder. Residual WC was present in the cermets with >= 10 vol% WC addition, whereas up to 15 vol% Mo2C addition completely dissolved into the NbC cermets. The phase evolution and influence of the WC/Mo2C content on the solid solution formation is discussed and the fracture toughness, Vickers hardness and transverse rupture strength was assessed.

引用

页数：12

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