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Type: Artigo de periódico
Title: Temperature measurements and adhesion properties of plasma sprayed thermal barrier coatings
Author: Lima, CRC
Trevisan, RD
Abstract: Metal-ceramic coatings have been widely used for industrial applications, mainly in the gas turbine and diesel engine industries as thermal barrier coatings (TBCs). Conventional thermal barrier coatings consist of a metallic bond coat and an insulating ceramic topcoat. Temperatures and temperature gradients in the coating during plasma spraying play an important role on the final coating quality, especially the temperature of the particles just hitting the substrate surface. In this work, metal-ceramic coatings were applied on nickel-superalloy substrates. The temperatures of both the coating surface and substrate were measured during spraying, The adhesion of the coatings was determined using ASTM C 633 and correlated with the measured temperatures. Optical pyrometry and thermocouples were used to measure the interfacial and substrate temperatures, respectively. Temperature was shown to have a significant influence where lower interfacial temperatures mere found to result in lower adhesion values.
Subject: adhesion
temperature influence
thermal barrier coatings
Country: EUA
Editor: Asm International
Citation: Journal Of Thermal Spray Technology. Asm International, v. 8, n. 2, n. 323, n. 327, 1999.
Rights: aberto
Identifier DOI: 10.1361/105996399770350548
Date Issue: 1999
Appears in Collections:Unicamp - Artigos e Outros Documentos

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