Hot isostatic pressing has been shown to be an effective post treatment for thermal spray coatings, improving hardness, density, and microstructure as well as metallurgical bonding between splats. In this study, the sliding wear resistance of as-sprayed and post-treated WC-Co deposited by HVOF is evaluated by means of ball-on-disk testing and the effects of HIPing are assessed based on SEM and XRD analysis, hardness measurements, and fracture toughness tests. Changes observed in the WC-Co layers, including the precipitation of carbides and the elimination of secondary phase W2C, are also discussed. Paper includes a German-language abstract.

coating microstructure, fracture toughness, high velocity oxyfuel spraying, hot isostatic pressing, sliding wear resistance, tungsten carbide-cobalt cermets
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Copyright © 2002 Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH. All rights reserved.
2002
Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH
Topics
Hot isostatic pressing Microstructural analysis High-velocity oxyfuel spray coating Fracture toughness Friction and wear properties Sliding wear testing Tungsten carbide cermets
Issue Section:
Poster Session: Coating Properties—Test, Measurement, and Characterization
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