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- Title
Preparation and Characterization of Self-Lubricating CaF<sub>2</sub>@ZrO<sub>2</sub>/YSZ Composite Coating.
- Authors
Zeng, Xian; Xiong, Yaqiong; Liu, Ziyong; Tong, Xu; Hu, Chengwei; Bian, Jiatong; Cao, Qian; Cheng, Xudong
- Abstract
Core-shell CaF2@ZrO2 powders were prepared by sol method combined with centrifugal atomization drying, aiming at preventing CaF2 from burning during the APS deposition of YSZ-based abradable seal coating. The microstructure, chemical composition, hardness and wear behavior of the YSZ coating, the YSZ-10CaF2 coating and the YSZ-10CaF2@ZrO2 coating were comparatively investigated. The results suggested that the core-shell powders effectively protected CaF2, where the amount of CaF2 remained in the YSZ-10CaF2@ZrO2 coating was higher than that in the YSZ-10CaF2 coating. The YSZ coating had the highest average hardness of 97.3 HR45Y and exhibited a mixed wear mechanism of adhesive and fatigue wear with a friction coefficient of 0.23 and a volume wear rate of 7.28 mm3/N m. Contributed to soft and self-lubricating CaF2, the hardness of the YSZ-10CaF2 and YSZ-10CaF2@ZrO2 coatings slightly declined to 95.1 and 94.5 HR45Y correspondingly. The YSZ-10CaF2 coating showed a mixed wear mechanism of abrasive and fatigue wear with a friction coefficient of 0.14 and a volume wear rate of 4.67 mm3/N m. Moreover, the YSZ-10CaF2@ZrO2 coatings showed a mixed wear mechanism of reduced adhesive and fatigue wear with a friction coefficient of 0.10 and a volume wear rate of 2.66 mm3/N m.
- Subjects
COMPOSITE coating; FRETTING corrosion; MECHANICAL wear; ADHESIVE wear
- Publication
Journal of Thermal Spray Technology, 2022, Vol 31, Issue 7, p2126
- ISSN
1059-9630
- Publication type
Article
- DOI
10.1007/s11666-022-01424-x