Microstructure and Hardness of Tungsten Coating for High Heat Resistant Material Produced by Means of Gas Tunnel Type Plasma Spraying

Kobayashi, Akira; Puric, Jagos

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タイトル	Microstructure and Hardness of Tungsten Coating for High Heat Resistant Material Produced by Means of Gas Tunnel Type Plasma Spraying
著者	Kobayashi, Akira Kobayashi, Akira
著者	Puric, Jagos Puric, Jagos
キーワード等	Tungsten
	Sprayed coatings
	Fusion materials
	Gas tunnel type plasma spraying
	Microstructure
	Vickers Hardness
	XRD
抄録	Tungsten (W) is the metal which has the highest melting point of 3422℃, therefore when deposited as a coating it can protect the substrate surface from high heat flux. The W composite produced by coating methods will be a superior candidate for aerospace materials which require high heat resistance (such as TBC). Thermal spraying method is one of potential candidates to produce W composites. In this study, pure W coatings were produced on stainless steel substrates by gas tunnel type plasma spraying at a short spraying distance (40-50mm). Regarding the microstructure, the W coating contained some pores. The Vickers micro-hardness of the W coating was measured as the mechanical property. The W coating had a hardness of Hv=260-320 along its cross section, which is a little lower than the hardness for bulk tungsten. The results of X ray Diffraction showed that the coating consists of pure tungsten, without oxidation.
公開者	大阪大学接合科学研究所
公開者の別表記	Joining and Welding Research Institute, Osaka University
公開者 (ヨミ)	オオサカダイガクセツゴウカガクケンキュウジョ
掲載誌名	Transactions of JWRI
巻	38
号	1
開始ページ	57
終了ページ	62
刊行年月	2009-09
ISSN	03874508
NCID	AA00867058
URL	http://hdl.handle.net/11094/10535
言語	英語
カテゴリ	紀要論文 Departmental Bulletin Paper
カテゴリ	Transactions of JWRI / Vol.38 No.1 (2009-09)

著者版フラグ	publisher
NII資源タイプ	紀要論文
ローカル資源タイプ	紀要論文
dcmi資源タイプ	text
DCTERMS.bibliographicCitation	Transactions of JWRI.38(1) P.57-P.62
DC.title	Microstructure and Hardness of Tungsten Coating for High Heat Resistant Material Produced by Means of Gas Tunnel Type Plasma Spraying
DC.creator	Kobayashi, Akira
DC.creator	Puric, Jagos
DC.publisher	大阪大学接合科学研究所
DC.language" scheme="DCTERMS.RFC1766	英語
DCTERMS.issued" scheme="DCTERMS.W3CDTF	2009-09
DC.identifier" scheme="DCTERMS.URI	http://hdl.handle.net/11094/10535
DC.subject	Tungsten
	Sprayed coatings
	Fusion materials
	Gas tunnel type plasma spraying
	Microstructure
	Vickers Hardness
	XRD
DCTERMS.abstract	Tungsten (W) is the metal which has the highest melting point of 3422℃, therefore when deposited as a coating it can protect the substrate surface from high heat flux. The W composite produced by coating methods will be a superior candidate for aerospace materials which require high heat resistance (such as TBC). Thermal spraying method is one of potential candidates to produce W composites. In this study, pure W coatings were produced on stainless steel substrates by gas tunnel type plasma spraying at a short spraying distance (40-50mm). Regarding the microstructure, the W coating contained some pores. The Vickers micro-hardness of the W coating was measured as the mechanical property. The W coating had a hardness of Hv=260-320 along its cross section, which is a little lower than the hardness for bulk tungsten. The results of X ray Diffraction showed that the coating consists of pure tungsten, without oxidation.
citation_title	Microstructure and Hardness of Tungsten Coating for High Heat Resistant Material Produced by Means of Gas Tunnel Type Plasma Spraying
citation_author	Kobayashi, Akira
citation_author	Puric, Jagos
citation_publisher	大阪大学接合科学研究所
citation_language	英語
citation_date	2009-09
citation_journal_title	Transactions of JWRI
citation_volume	38
citation_issue	1
citation_firstpage	57
citation_lastpage	62
citation_issn	03874508
citation_public_url	http://hdl.handle.net/11094/10535
citation_keywords	Tungsten
	Sprayed coatings
	Fusion materials
	Gas tunnel type plasma spraying
	Microstructure
	Vickers Hardness
	XRD

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