Influence of Temperature in Barothermal Treatment of Sintered Cemented Carbides on the Evolution of Their Structure and Properties

We investigated the effect of barothermal treatment at a pressure of 8 GPa and temperatures of 1450–1700°C on the structure and properties of cemented carbides with varying cobalt concentrations. The application of barothermal treatment led to a 30% increase in the grain size of the carbide phase an...

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Bibliographic Details
Published in:Journal of superhard materials 2023-12, Vol.45 (6), p.444-450
Main Authors: Hnatenko, I. O., Andreiev, I. V., Lysovenko, S. O., Roik, O. S., Osipov, O. S., Kosenchuk, T. O.
Format: Article
Language:English
Subjects:
Cemented carbides
Chemistry
Chemistry and Materials Science
Grain size
Intermetallic phases
Liquid phases
Physical Chemistry
Production
Properties
Sintering (powder metallurgy)
Solid phases
Stress intensity factors
Structure
Tungsten carbide
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Summary:We investigated the effect of barothermal treatment at a pressure of 8 GPa and temperatures of 1450–1700°C on the structure and properties of cemented carbides with varying cobalt concentrations. The application of barothermal treatment led to a 30% increase in the grain size of the carbide phase and a decrease in overall porosity. For WC–6Co alloys treated under conditions of solid-phase sintering, an increase in hardness and the stress intensity factor are observed. The barothermal treatment of WC–15Co alloys at temperatures corresponding to the existence of a liquid phase leads to the formation of Co 3 W 3 C intermetallic phases.
ISSN:1063-4576
1934-9408
DOI:10.3103/S1063457623060047