Bond Coat Oxidation and Hot Corrosion Behavior of Plasma Sprayed YSZ Coating on Ni Superalloy

Saremi, Mohsen; Afrasiabi, Abbas; Kobayashi, Akira

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タイトル	Bond Coat Oxidation and Hot Corrosion Behavior of Plasma Sprayed YSZ Coating on Ni Superalloy
著者	Saremi, Mohsen Saremi, Mohsen
	Afrasiabi, Abbas Afrasiabi, Abbas
	Kobayashi, Akira Kobayashi, Akira
キーワード等	Oxidation
	Hot corrosion
	YSZ
	Plasma spray
抄録	Oxidation and hot corrosion are considered as two main destructive factors in thermal barrier coatings (TBCs). The mechanisms of bond coat oxidation and hot corrosion of yttria stabilized zirconia (YSZ) plasma sprayed coatings were evaluated. Oxidation tests were carried out at 1100℃ for 22,42 and 100h. Hot corrosion tests were performed on the coating in molten salt (Na₂SO₄+V₂O₅) at 1050℃ for 40h. Spallation was observed at the bond coat/YSZ interface after 100h oxidation. Micro XRD analysis after the oxidation test revealed the formation of destructive oxides such as NiCr₂O₄, NiCrO₃ and NiCrO₄ within the bond coat of YSZ coating. XRD and SEM studies after hot corrosion demonstrated the formation of monoclinic ZrO₂ and YVO₄ crystals as hot corrosion products, which caused the degradation of YSZ coating.
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	36
号	1
開始ページ	41
終了ページ	45
刊行年月	2007-07
ISSN	03874508
NCID	AA00867058
URL	http://hdl.handle.net/11094/5187
言語	英語
カテゴリ	紀要論文 Departmental Bulletin Paper
カテゴリ	Transactions of JWRI / Vol.36 No.1 (2007-07)

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.36(1) P.41-P.45
DC.title	Bond Coat Oxidation and Hot Corrosion Behavior of Plasma Sprayed YSZ Coating on Ni Superalloy
DC.creator	Saremi, Mohsen
	Afrasiabi, Abbas
	Kobayashi, Akira
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	2007-07
DC.identifier" scheme="DCTERMS.URI	http://hdl.handle.net/11094/5187
DC.subject	Oxidation
	Hot corrosion
	YSZ
	Plasma spray
DCTERMS.abstract	Oxidation and hot corrosion are considered as two main destructive factors in thermal barrier coatings (TBCs). The mechanisms of bond coat oxidation and hot corrosion of yttria stabilized zirconia (YSZ) plasma sprayed coatings were evaluated. Oxidation tests were carried out at 1100℃ for 22,42 and 100h. Hot corrosion tests were performed on the coating in molten salt (Na₂SO₄+V₂O₅) at 1050℃ for 40h. Spallation was observed at the bond coat/YSZ interface after 100h oxidation. Micro XRD analysis after the oxidation test revealed the formation of destructive oxides such as NiCr₂O₄, NiCrO₃ and NiCrO₄ within the bond coat of YSZ coating. XRD and SEM studies after hot corrosion demonstrated the formation of monoclinic ZrO₂ and YVO₄ crystals as hot corrosion products, which caused the degradation of YSZ coating.
citation_title	Bond Coat Oxidation and Hot Corrosion Behavior of Plasma Sprayed YSZ Coating on Ni Superalloy
citation_author	Saremi, Mohsen
	Afrasiabi, Abbas
	Kobayashi, Akira
citation_publisher	大阪大学接合科学研究所
citation_language	英語
citation_date	2007-07
citation_journal_title	Transactions of JWRI
citation_volume	36
citation_issue	1
citation_firstpage	41
citation_lastpage	45
citation_issn	03874508
citation_public_url	http://hdl.handle.net/11094/5187
citation_keywords	Oxidation
	Hot corrosion
	YSZ
	Plasma spray

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