Microstructure, Mechanical and Thermal Properties of Plasma-Sprayed W/SiC Metal Matrix Composite Coating

Fahim, F. Narges; Kobayashi, Akira

doi:https://doi.org/10.18910/9849

Microstructure, Mechanical and Thermal Properties of Plasma-Sprayed W/SiC Metal Matrix Composite Coating

Fahim, F. Narges; Kobayashi, Akira

Transactions of JWRI, 2006, 35(2), 35-41

アクセス数:255件（2025-12-08 04:45 集計）

固定URL: https://doi.org/10.18910/9849

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タイトル	Microstructure, Mechanical and Thermal Properties of Plasma-Sprayed W/SiC Metal Matrix Composite Coating
著者	著者名 Fahim, F. Narges
著者	NRID 1000070110773 1000070110773 著者名 Kobayashi, Akira
キーワード等	W/SiC Metal-Matrix Composite
	Gas Tunnel Type Plasma Spraying
	Microstructure
	Microhardness
	Abrasive Wear
	Thermal Diffusivity
	Thermal Conductivity
抄録	A functionally graded SiC/W metal matrix composite (MMC) has been successfully produced by gas tunnel type plasma spraying. The starting powder was a mixture of 12% W and 88 wt% SiC. The effect of plasma gun current on the microstructure, mechanical and thermal conductivity properties was investigated. The results revealed that the reaction phases, namely tungsten silicides (WSi₂, W₅Si₃) and tungsten carbides (WC, W₂C), were not formed in various processing conditions. The presence of WO₃ was detected in the composite deposits, which indicated that the tungsten partially oxidized during plasma spraying. Also, the composite deposited was dense and nearly free of pores due to the small mismatch between the coefficients of thermal expansion (CTE) for W and SiC. Microhardness values gradually decreased as a function of input current due to the formation of WO₃ and the decomposition of SiC particles in the high temperature flame region. A thermal conductivity as high as ～ 59 W/m.K was obtained. It was found that both tungsten oxide and structure imperfections have a significant influence on the thermal conductivity and mechanical properties.
出版者	大阪大学接合科学研究所
	オオサカダイガクセツゴウカガクケンキュウジョ
	Joining and Welding Research Institute, Osaka University
収録物名	Transactions of JWRI
巻(号)	35(2)
ページ	35-41
刊行年月	2006-12
言語	英語
ハンドルURL	https://hdl.handle.net/11094/9849
DOI	https://doi.org/10.18910/9849
PISSN	03874508
NCID	AA00867058
アクセス権	open access
出版タイプ	Version of Record
カテゴリ	紀要論文 Departmental Bulletin Paper
カテゴリ	Transactions of JWRI / Vol.35 No.2 (2006-12)

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. 2006, 35(2), p. 35-41
DC.title	Microstructure, Mechanical and Thermal Properties of Plasma-Sprayed W/SiC Metal Matrix Composite Coating
DC.creator	Fahim, F. Narges
DC.creator	Kobayashi, Akira
DC.publisher	大阪大学接合科学研究所
	オオサカダイガクセツゴウカガクケンキュウジョ
	Joining and Welding Research Institute, Osaka University
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2006-12
DC.subject	W/SiC Metal-Matrix Composite
	Gas Tunnel Type Plasma Spraying
	Microstructure
	Microhardness
	Abrasive Wear
	Thermal Diffusivity
	Thermal Conductivity
DCTERMS.abstract	A functionally graded SiC/W metal matrix composite (MMC) has been successfully produced by gas tunnel type plasma spraying. The starting powder was a mixture of 12% W and 88 wt% SiC. The effect of plasma gun current on the microstructure, mechanical and thermal conductivity properties was investigated. The results revealed that the reaction phases, namely tungsten silicides (WSi₂, W₅Si₃) and tungsten carbides (WC, W₂C), were not formed in various processing conditions. The presence of WO₃ was detected in the composite deposits, which indicated that the tungsten partially oxidized during plasma spraying. Also, the composite deposited was dense and nearly free of pores due to the small mismatch between the coefficients of thermal expansion (CTE) for W and SiC. Microhardness values gradually decreased as a function of input current due to the formation of WO₃ and the decomposition of SiC particles in the high temperature flame region. A thermal conductivity as high as ～ 59 W/m.K was obtained. It was found that both tungsten oxide and structure imperfections have a significant influence on the thermal conductivity and mechanical properties.
DC.identifier	10.18910/9849
DC.format	9849
citation_title	Microstructure, Mechanical and Thermal Properties of Plasma-Sprayed W/SiC Metal Matrix Composite Coating
citation_author	Fahim, F. Narges
citation_author	Kobayashi, Akira
citation_publisher	大阪大学接合科学研究所
citation_language	英語
citation_date	2006-12
citation_journal_title	Transactions of JWRI
citation_volume	35
citation_issue	2
citation_firstpage	35
citation_lastpage	41
citation_public_url	https://hdl.handle.net/11094/9849
citation_doi_detail	10.18910/9849
citation_doi	https://doi.org/10.18910/9849

Microstructure, Mechanical and Thermal Properties of Plasma-Sprayed W/SiC Metal Matrix Composite Coating

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