Zirconium Carbide-Tungsten Cermets Prepared by In Situ Reaction Sintering
Abstract
Zirconium carbide-tungsten (ZrC-W) cermets were prepared by a novel in situ reaction sintering process. Compacted stoichiometric zirconium oxide (ZrO2) and tungsten carbide (WC) powders were heated to 2100⁰C, which produced cermets with 35 vol% ZrC and 65 vol% W consisting of an interpenetrating-type microstructure with a relative density of ~95%. The cermets had an elastic modulus of 274 GPa, a fracture toughness of 8.3 MPa·m1/2, and a flexural strength of 402 MPa. The ZrC content could be increased by adding excess ZrC or ZrO2 and carbon to the precursors, which increased the density to >98%. The solid-state reaction between WC and ZrO2 and W-ZrC solid solution were also studied thermodynamically and experimentally.
Recommended Citation
S. C. Zhang et al., "Zirconium Carbide-Tungsten Cermets Prepared by In Situ Reaction Sintering," Journal of the American Ceramic Society, vol. 90, no. 6, pp. 1930 - 1933, Wiley-Blackwell, Apr 2007.
The definitive version is available at https://doi.org/10.1111/j.1551-2916.2007.01642.x
Department(s)
Materials Science and Engineering
Keywords and Phrases
In situ reaction sintering; Relative density; Tungsten carbide powders; Density (specific gravity); Elastic moduli; Microstructure; Sintering; Solid solutions; Zirconia; Cermets
International Standard Serial Number (ISSN)
0002-7820; 1551-2916
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2007 Wiley-Blackwell, All rights reserved.
Publication Date
01 Apr 2007
Comments
This article is corrected by Erratum: Zirconium Carbide-tungsten Cermets Prepared by In-situ Reaction Sintering.