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4764 |
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Tuesday, May 10, 2016, Room 3E 3:00 PM New Processes I |
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Plasma spraying of fine ceramic powder with a 6-kW rf induction plasma torch |
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Kentaro Shinoda* / National Institute of Advanced Industrial Science and Technology, Japan Masakazu Mori / Ryukoku University, Japan Takanori Saeki/ National Institute of Advanced Industrial Science and Technology (AIST), Japan Jun Akedo/ National Institute of Advanced Industrial Science and Technology (AIST), Japan |
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Rf induction plasma spraying is a promising coating technology that utilizes its relatively large plasma volume compared to dc plasma, enabling uniform heating of powder particles and hence uniform coatings. Meanwhile, rf induction plasma systems were complex and expensive, which prevented from gaining popularity in spray coating technologies. However, recently compact and moderate rf induction plasma systems have been commercially available thanks to the development of solid-state technology. These inexpensive systems may offer another opportunity for rf induction plasma spraying especially for coating deposition with fine ceramic powder. In this study, we have explored the ability of a 6-kW rf induction plasma torch for plasma spraying of fine ceramic powder. Numerical simulation was also employed to understand the plasma state under a wide variety of conditions especially in pressure. This work was conducted as a part of High-value added ceramic products manufacturing technologies project supported by CSTI, SIP, Innovative design/manufacturing technologies (managed by NEDO). |