Material Spraying Using Electromagnetically Accelerated Plasma
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概要
- 論文の詳細を見る
In magneto-plasma-dynamic (MPD) arcjet generators, plasma is accelerated by electromagnetic body forces. The MPD arcjet generator can produce higher-velocity, higher-temperature, higher-density and larger-area plasmas than those of conventional thermal plasma torches. Two types of MPD arcjet generator were developed for applications to ceramic spray coatings. One generator was installed with a cathode covered with mullite or zirconia ceramics and the other with a titanium cathode. The former was operated with Ar for mullite or zirconia coating by an ablation process of the cathode cover and the latter with N2 for titanium nitride coating by a reactive process between ablated titanium particles and nitrogen plasma. The MPD spray process could successfully form dense, uniform and hard ceramic coatings. In titanium nitride reactive spraying, plasma diagnostic measurement and flowfield analysis were also carried out. A large amount of N and N+ was expected to be exhausted with a high velocity from the MPD generator. Both the electron temperature and the electron number density were kept high at a substrate position compared with those for conventional low-pressure thermal sprayings. A chemically active plasma with excited particles of N+, Ti, Ti+ and Ti2+ was expected to contribute to better titanium nitride coatings. All coating characteristics showed that the MPD arcjet generators had high potentials for ceramic spray coatings.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2003-06-15
著者
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Yasui Toshiaki
Department Of Production Systems Engineering Toyohashi University Of Technology
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TAHARA Hirokazu
Division of Mechanical Engineering, Department of Mechanical Science and Bioengineering, Graduate Sc
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YOSHIKAWA Takao
Division of Mechanical Engineering, Department of Mechanical Science and Bioengineering, Graduate Sc
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Kagaya Yoichi
Division Of Mechanical Engineering Department Of Mechanical Science And Bioengineering Graduate Scho
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Ando Yasutaka
Department Of Mechanical Engineering Ashikaga Institute Of Technology
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Shibata Tetsuji
Division Of Mechanical Engineering Department Of Mechanical Science And Bioengineering Graduate Scho
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Mitsuo Kazunori
Division Of Mechanical Engineering Department Of Mechanical Science And Bioengineering Graduate Scho
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Tahara Hirokazu
Division of Mechanical Engineering, Department of Mechanical Science and Bioengineering, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
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Kagaya Yoichi
Division of Mechanical Engineering, Department of Mechanical Science and Bioengineering, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
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Yoshikawa Takao
Division of Mechanical Engineering, Department of Mechanical Science and Bioengineering, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
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Ando Yasutaka
Department of Mechanical Engineering, Ashikaga Institute of Technology, Ashikaga, Tochigi 326-8558, Japan
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Mitsuo Kazunori
Division of Mechanical Engineering, Department of Mechanical Science and Bioengineering, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
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Shibata Tetsuji
Division of Mechanical Engineering, Department of Mechanical Science and Bioengineering, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
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Yasui Toshiaki
Department of Process Systems Engineering, Toyohashi University of Technology, Toyohashi, Aichi 441-8580, Japan
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