1998年11月
Evaluation of thermal shock strength of thermal-sprayed coatings by the laser irradiation technique
SURFACE & COATINGS TECHNOLOGY
- ,
- ,
- ,
- 巻
- 110
- 号
- 1-2
- 開始ページ
- 73
- 終了ページ
- 80
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- 出版者・発行元
- ELSEVIER SCIENCE SA
Ceramic coatings by thermal spraying have excellent wear- and heat-resistant characteristics. Therefore, it is very important to investigate their thermal shock resistance. This paper presents a novel method for evaluating thermal shock resistance of ceramic coatings by laser irradiation technique. The critical power density of a laser beam is introduced to measure a fracture criterion, which corresponds to a critical temperature difference for bulk ceramics. Using this, critical fracture curves are obtained experimentally, which are a function of the coating thickness and beam diameter. These critical fracture curves are also obtained theoretically based on a simple numerical model. Both the results show a reasonably good agreement. It was concluded that the thermal shock strength of thermal-sprayed coatings decreases with increasing coating thickness. (C) 1998 Elsevier Science S.A. All rights reserved.
- リンク情報
- ID情報
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- ISSN : 0257-8972
- Web of Science ID : WOS:000077307600013