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D. Dalmas
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Proceedings Papers

Characterization of Cracking Within WC-Co Coated Materials by an Acoustic Emission Method During Four Points Bending Tests

D. Dalmas, S. Benmedakhene, C. Richard, A. Laksimi, T. Gregoire
ITSC2000, Thermal Spray 2000: Proceedings from the International Thermal Spray Conference, 1335-1340, May 8–11, 2000,
https://doi.org/10.31399/asm.cp.itsc2000p1335
Abstract
The aim of this work is to study the adhesion of WC-Co coatings using acoustic emission testing. The coatings were produced by HVOF spraying then subjected to four-point bending while in situ acoustic emission measurements were made. The test specimens were then examined under a microscope, revealing regularly spaced transverse cracks on the coating surface as well as interfacial cracking. An analysis of the acoustic emission data revealed two types of acoustic events based on absolute energy and amplitude. This appears to be linked to the cracks that were observed forming the basis for an interfacial cracking model.
View Papertitled, Characterization of Cracking Within WC-Co Coated Materials by an Acoustic Emission Method During Four Points Bending Tests View PDF for content titled, Characterization of Cracking Within WC-Co Coated Materials by an Acoustic Emission Method During Four Points Bending Tests
Proceedings Papers

Corrosion Behavior in Seawater of WC-Co Coatings Obtained by HVOF and APS

C. Richard, G. Béranger, F. Merlier, D. Dalmas, J. Lu
ITSC1999, Thermal Spray 1999: Proceedings from the United Thermal Spray Conference, 458-461, March 17–19, 1999,
https://doi.org/10.31399/asm.cp.itsc1999p0458
Abstract
The main aim of this paper is the evaluation of the electrochemical behavior of the WC-Co layers. In this paper, which lies within the scope of a general characterization of coatings WC-Co, a particular point is related to the electrochemical behavior in sea water of these deposits projected by APS and Jet-Kote in relation to their microstructure. The paper shows a different corrosion resistance of the APS and HVOF coatings. In addition, it is observed that the durability of the applications was strongly temperature-dependent. Paper includes a German-language abstract.
View Papertitled, Corrosion Behavior in Seawater of WC-Co Coatings Obtained by HVOF and APS View PDF for content titled, Corrosion Behavior in Seawater of WC-Co Coatings Obtained by HVOF and APS