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jwri38_01_057 pdf 312 KB 189 2012.09.22

論文情報

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
NRID
1000070110773 1000070110773
著者名
Kobayashi, Akira
著者名
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.
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
38
号
1
開始ページ
57
終了ページ
62
刊行年月
2009-09
言語
英語
ハンドルURL
https://hdl.handle.net/11094/10535
ISSN
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
Transactions of JWRI / Vol.38 No.1 (2009-09)