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Title :圧子押し込み法による界面強度評価に向けた基礎的検討
Title alternative :Basic Study on Interfacial Strength Evaluation by Indentation Method
Authors :山崎, 泰広
長谷川, 誠也
Publisher :新潟工科大学
Issue Date :Dec-2012
Journal Title :新潟工科大学研究紀要
Volume :17
Start Page :7
End Page :12
ISSN :1342-792X
Abstract :Interfacial toughness of coatings is required for two reasons: a) to understand quantitatively degradation of adhesion in service; b) for life assessment of the coated components. Adhesion strength of thermal spray coating is usually measured in accordance with the tensile method specified by the "ISO 14916". Nevertheless, there is technical problem that ISO 14916 can't be applied to evaluate the coating with adhesion higher than strength of the glue which must be used to prepare the tensile test specimen. Especially, the interfacial toughness of coatings can't be evaluated by the ISO 14916. By the virtue of its simplicity and practicality, an indentation method is addressed as one of the promising methods to evaluate the interfacial toughness of coatings. In this method, an interfacial toughness value can be evaluated by measuring a length of the crack formed after pushing the indenter on the coating interface. However, a 3 dimensional geometry of the induced crack which affects the interfacial toughness has not been clear. In this study, an in-situ observation system to observe the cracking behavior by indentation was developed. The 3 dimensional shapes of cracks induced by indentation were observed and analyzed by means of this system.
Keywords :Interfacial crack
3 dimensional geometry of crack
Type Local :Departmental Bulletin Paper
Language :jpn
URI :http://hdl.handle.net/10623/38602
Appears in Collections:01 新潟工科大学研究紀要 = Bulletin of Niigata Institute of Technology

Please use this identifier to cite or link to this item: http://hdl.handle.net/10623/38602

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