Effect of TiO2 on mechanical and thermal properties of Al2O3-based coating via atmospheric plasma spraying

ABSTRACTIn this study, Al2O3-based coatings with varying TiO2 contents (0, 3, 13, and 40%) were fabricated using atmospheric plasma spraying technique. To compare the superiority of the samples, their mechanical (Vickers hardness and adhesion strength) and thermal properties (thermal conductivity an...

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Bibliographic Details
Main Authors: Hansol Kwon, Yeon Woo Yoo, Youngjin Park, Uk Hee Nam, Eungsun Byon
Format: Article
Language:English
Published: Taylor & Francis Group 2023-04-01
Series:Journal of Asian Ceramic Societies
Subjects:
Online Access:https://www.tandfonline.com/doi/10.1080/21870764.2023.2203991
Description
Summary:ABSTRACTIn this study, Al2O3-based coatings with varying TiO2 contents (0, 3, 13, and 40%) were fabricated using atmospheric plasma spraying technique. To compare the superiority of the samples, their mechanical (Vickers hardness and adhesion strength) and thermal properties (thermal conductivity and thermal shock resistance) were characterized. As observed, Al2O3-40%TiO2 (A-40T) coating exhibited relatively inferior mechanical properties but superior thermal insulation and thermal shock resistance at 600°C. According to the microstructure and phase analysis, this finding is attributed to the special phase, Al2TiO5, and preexisting microcracks inside the coating. Thus, A-40T manifested excellent characteristics for thermal insulation application compared with pure Al2O3 and low-TiO2 content coatings.
ISSN:2187-0764