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Clogging and lump formation during atmospheric plasma spraying with powder injection downstream the plasma gun
University West, Department of Engineering Science, Division of Manufacturing Processes.ORCID iD: 0000-0003-2535-8132
University West, Department of Engineering Science, Division of Manufacturing Processes.ORCID iD: 0000-0003-1181-0415
Volvo Aero Corporation, Trollhättan.
Volvo Aero Corporation, Trollhättan.
2007 (English)In: Journal of thermal spray technology (Print), ISSN 1059-9630, E-ISSN 1544-1016, Vol. 16, no 4, p. 512-523Article in journal (Refereed) Published
Abstract [en]

This study aimed to numerically and experimentally investigate lump formation during atmospheric plasma spraying with powder injection downstream the plasma gun exit. A first set of investigations was focused on the location and orientation of the powder port injector. It turned out impossible to keep the coating quality while avoiding lumps by simply moving the powder injector. A new geometry of the powder port ring holder was designed and optimized to prevent nozzle clogging, and lump formation using a gas screen. This solution was successfully tested for applications with Ni-5wt.%Al and ZrO2-7wt.%Y2O3 powders used in production. The possible secondary effect of plasma jet shrouding by the gas screen, and its consequence on powder particles prior to impact was also studied.

Place, publisher, year, edition, pages
2007. Vol. 16, no 4, p. 512-523
Keywords [en]
influence of spray parameters, shrouded spraying, spray deposition
National Category
Reliability and Maintenance Metallurgy and Metallic Materials
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-124DOI: 10.1007/s11666-007-9073-0OAI: oai:DiVA.org:hv-124DiVA, id: diva2:211220
Available from: 2009-04-09 Created: 2009-04-09 Last updated: 2017-12-13Bibliographically approved

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Choquet, IsabelleBjörklund, Stefan

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