Laser densification of organic coating: Effects of laser wavelength, operating parameters and substrate properties

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• 作者：Camelia Demian^a ; ^b ; ^{camelia.demian@utbm.fr} ; Sophie Costil^a ; Pierre Sallamand^b ; Adriana Soveja^a ; ^c ; Hanlin Liao^a ; Simone Matteï ; ^b
• 关键词：Organic coating ; Laser radiation ; Absorption coefficient ; Densification ; Heat transfer
• 刊名：Surface and Coatings Technology
• 出版年：2012
• 期刊代码：106_02578972
• 类别：ms
• 出版时间：15 April, 2012
• 卷：206
• 期：16
• 页码：3526-3533
• 文件大小：1828 K

摘要

Mechanical bonding and interface behaviour play a key role for any materials deposited on different substrates. Usually, a post-spray heat treatment is required to improve the coating morphology and to enhance mechanical properties of thermal-sprayed polymeric coating. The effects of YAG, CO₂ and diode laser radiations on as-sprayed PEEK coating deposited on stainless steel and aluminum substrates were investigated. The results revealed a good coating densification and interface behavior. A correlation between coating and substrate absorption coefficients, their thermophysical properties and laser operating parameters was shown. Besides, the finite element modeling based on IR temperature measurements during diode laser irradiation demonstrated that the densification of organic coating occurs above its melting point.