Title: VC-doped WC-NbC-Co hardmetals
Authors: Huang, Shuigen ×
Van der Biest, Omer
Vleugels, Jef #
Issue Date: Aug-2008
Publisher: Elsevier science sa
Series Title: Materials science and engineering a-structural materials properties microstructure and processing vol:488 issue:1-2 pages:420-427
Abstract: The influence of the addition of 0.9, 1.8, 3.6 and 5.4 wt.% VC on the microstructure and mechanical properties of WC-NbC-12 wt.% Co with 10, 20, 30 or 40 wt.% NbC hardmetals prepared by conventional liquid phase sintering in vacuum for 1 h at 1420 degrees C was investigated. Microstructural analysis revealed that the WC grain size as well as the amount of residual WC-Co in the sintered hardmetals was strongly influenced by the VC and NbC content. The WC grain growth Could be strongly limited and even completely inhibited by the combined addition of NbC and VC, whereas the NbC phase converted into a (Nb,W,V)C solid solution during sintering. Microstructural investigation was supported by thermodynamic equilibrium calculations to predict the composition of the NbC phase as a function of the NbC and VC content in the starting powder. The fracture toughness and hardness of the hardmetals were evaluated and explained in terms of the final WC grain size and the residual WC-Co fraction in the hardmetal. (C) 2007 Elsevier B.V. All rights reserved.
ISSN: 0921-5093
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Department of Materials Engineering - miscellaneous
Physical Metallurgy and Materials Engineering Section (-)
× corresponding author
# (joint) last author

Files in This Item:
File Description Status SizeFormat
pub04657.pdfMain article Published 2056KbAdobe PDFView/Open Request a copy

These files are only available to some KU Leuven Association staff members


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science