Effects of Different Powder Feeding Rates on the Microstructure and Erosion Resistance of Plasma-PhysicaI Vapor Deposition Thermal Barrier Coatings

Tuesday, May 6, 2025
Exhibit Hall - East Hall AB (Vancouver Convention Centre)
Dr. Ziqian Deng , Institute of New Materials, Guangdong Academy of Science;National Engineering Laboratory for Modern Materials Surface Engineering Technology, Guangzhou, Guangdong, China
Prof. Min LIU , Institute of New Materials, Guangdong Academy of Science;National Engineering Laboratory for Modern Materials Surface Engineering Technology, Guangzhou, Guangdong, China
Prof. Changguang DENG , Institute of New Materials, Guangdong Academy of Science;National Engineering Laboratory for Modern Materials Surface Engineering Technology, Guangzhou, Guangdong, China
Prof. Chunming DENG , Institute of New Materials, Guangdong Academy of Science;National Engineering Laboratory for Modern Materials Surface Engineering Technology, Guangzhou, Guangdong, China
Prof. Xiaofeng Zhang , Institute of New Materials, Guangdong Academy of Science;National Engineering Laboratory for Modern Materials Surface Engineering Technology, Guangzhou, Guangdong, China
Thermal barrier coatings (TBCs) prepared by plasma spraying-physical vapor deposition (PS-PVD) have excellent thermal insulation and thermal shock resistance, but their erosion and corrosion resistance need to be further improved. In the study, different PS-PVD 7YSZ columnar coatings were fabricated by tuning the powder feed rate during the bottom, middle and top deposition stages. The microstructures of these coatings were observed, and their erosion and corrosion resistance performances were tested. It has been found that PS-PVD coating with a denser bottom and top structure can be fabricated by tuning the powder feed rate at different growth stages and can have both high particle erosion and corrosion resistance.
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