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jwri36_02_087
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論文情報
タイトル
Crack Branching Phenomenon of Zirconia Plasma Spray Coating
著者
El-Sheikhy, Refat
El-Sheikhy, Refat
Kobayashi, Akira
Kobayashi, Akira
キーワード等
Crack Propagation
Crack Branching
Zirconia Coating
Fracture Spreading
Delamination
Global-Local Fracture Criterion
Linear Elastic Fracture Mechanics
Elastic-Plastic Deformation
抄録
Gas tunnel plasma spray coating technology has been introduced as one of the recent advances in smart coating technology. Several factors control the quality of the final product of the coating material. Some factors can be summarized as the gas discharge rate, powder size, powder rate, plasma size and temperature, heating time, cooling rate and time, coating time, number of coating layers, relative speed of the sample and plasma spray, etc. These factors have a certain role in addition to the quality in determination of the safe life time of the coating product. Safe life time length and sustainability are actually control the cost and economy of the coating product. Life and history of coating composite will depend on the ability of the composite material to resist failure through fracture, crack propagation, spreading and delamination. The plasma spray coating composite often suffers from cracks and delaminations. Therefore, this research was carried out as a part of our study of zirconia coating to study fracture in early ages of plasma spray coating. Also, this research introduces a method of studying fracture during the life history of the coating composite. This paper discusses a very important problem in fracture mechanics science which is the branching phenomena of the cracks during the process of fracture. This treatment of the branching phenomena of cracks is newly introduced. It depends on the distribution of stresses at the crack tips under remote loading and involves experimental observations in order to have a logical philosophy and understanding for this abnormal natural phenomenon.
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
2
開始ページ
87
終了ページ
94
刊行年月
2007-12
ISSN
03874508
NCID
AA00867058
URL
http://hdl.handle.net/11094/5995
言語
英語
カテゴリ
紀要論文 Departmental Bulletin Paper
Transactions of JWRI / Vol.36 No.2 (2007-12)
論文詳細を表示
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
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text
DCTERMS.bibliographicCitation
Transactions of JWRI.36(2) P.87-P.94
DC.title
Crack Branching Phenomenon of Zirconia Plasma Spray Coating
DC.creator
El-Sheikhy, Refat
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
2007-12
DC.identifier" scheme="DCTERMS.URI
http://hdl.handle.net/11094/5995
DC.subject
Crack Propagation
Crack Branching
Zirconia Coating
Fracture Spreading
Delamination
Global-Local Fracture Criterion
Linear Elastic Fracture Mechanics
Elastic-Plastic Deformation
DCTERMS.abstract
Gas tunnel plasma spray coating technology has been introduced as one of the recent advances in smart coating technology. Several factors control the quality of the final product of the coating material. Some factors can be summarized as the gas discharge rate, powder size, powder rate, plasma size and temperature, heating time, cooling rate and time, coating time, number of coating layers, relative speed of the sample and plasma spray, etc. These factors have a certain role in addition to the quality in determination of the safe life time of the coating product. Safe life time length and sustainability are actually control the cost and economy of the coating product. Life and history of coating composite will depend on the ability of the composite material to resist failure through fracture, crack propagation, spreading and delamination. The plasma spray coating composite often suffers from cracks and delaminations. Therefore, this research was carried out as a part of our study of zirconia coating to study fracture in early ages of plasma spray coating. Also, this research introduces a method of studying fracture during the life history of the coating composite. This paper discusses a very important problem in fracture mechanics science which is the branching phenomena of the cracks during the process of fracture. This treatment of the branching phenomena of cracks is newly introduced. It depends on the distribution of stresses at the crack tips under remote loading and involves experimental observations in order to have a logical philosophy and understanding for this abnormal natural phenomenon.
citation_title
Crack Branching Phenomenon of Zirconia Plasma Spray Coating
citation_author
El-Sheikhy, Refat
Kobayashi, Akira
citation_publisher
大阪大学接合科学研究所
citation_language
英語
citation_date
2007-12
citation_journal_title
Transactions of JWRI
citation_volume
36
citation_issue
2
citation_firstpage
87
citation_lastpage
94
citation_issn
03874508
citation_public_url
http://hdl.handle.net/11094/5995
citation_keywords
Crack Propagation
Crack Branching
Zirconia Coating
Fracture Spreading
Delamination
Global-Local Fracture Criterion
Linear Elastic Fracture Mechanics
Elastic-Plastic Deformation