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Novel Deposition of Columnar Y 3 Al 5 O 12 Coatings by Electrostatic Spray‐Assisted Vapor Deposition
Author(s) -
Wu Yiquan,
Du Jing,
Choy KwangLeong
Publication year - 2006
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2005.00700.x
Subject(s) - microstructure , materials science , chemical vapor deposition , coating , deposition (geology) , crystallite , crystallization , chemical engineering , physical vapor deposition , metallurgy , mineralogy , composite material , nanotechnology , chemistry , paleontology , sediment , engineering , biology
A novel and cost‐effective electrostatic spray‐assisted vapor deposition (ESAVD) was used to deposit Y 3 Al 5 O 12 (YAG) coatings. Polycrystalline single‐phase Y 3 Al 5 O 12 coatings were synthesized using the ESAVD method in an open atmosphere at 650°C, and then annealed at 700°–900°C for 1 h. The ESAVD process involves the decomposition and chemical reactions of charged aerosol in vapor phase. The low‐temperature coating deposition characteristics of the ESAVD process using a suitable sol precursor decreases the reaction and crystallization temperatures for forming Y 3 Al 5 O 12 coatings. The microstructure of the Y 3 Al 5 O 12 coating prepared using the ESAVD method is columnar and such strain‐resistance microstructure could be useful for thermal barrier coating applications.