Tribological Properties of YSZ–CaF2–Al2O3 Coating Under Wide Temperature Range
LI Jing1,2, ZENG Yuansong1,2, LIU Hongge1,2,3, JING Jiannong1,2, CUI Xiangzhong1,2, CUI Xiufang3, JIN Guo3
1. Aviation Key Laboratory of Science and Technology on Advanced Surface Engineering, AVIC Manufacturing, Technology Institute Beijing 100024, China;
2. Science and Technology on Power Beam Processes Laboratory, AVIC Manufacturing Technology Institute, Beijing 100024, China;
3. College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150006, China
We prepared YSZ-based composite coatings with CaF2/Al2O3 as additives using atmospheric plasma spraying (APS). We prepared two groups: Group A (YSZ + 6% CaF2 + 6% Al2O3) and Group B (YSZ + 12% CaF2 + 12% Al2O3), and investigated their tribological performance and lubrication mechanisms across a wide temperature range (room temperature –1100 ℃ ). Results show that Group B, with higher additive content, exhibited lower room-temperature Vickers hardness (337HV0.5) than Group A (423HV0.5), but achieved a significantly reduced friction coefficient of 0.22 at 800 ℃. At low temperatures (≤400 ℃), mechanical strength dominated friction behavior, while at high temperatures (≥600 ℃), CaF2 actively reduced shear strength through ductile-to-brittle transition, synergizing with Al2O3 to dynamically form oxide glaze layers that enhanced lubrication. At 1100 ℃ , Group A developed a stable glaze layer via Ca diffusion and CaZrO3 formation, lowering the friction coefficient to 0.16, whereas Group B failed due to excessive additive content.
李晶，曾元松，刘洪歌，靖建农，崔向中，崔秀芳，金国. 宽温域下YSZ–CaF2–Al2O3涂层的摩擦学性能研究[J]. 航空制造技术, 2026, 69(5): 140-149.
LI Jing, ZENG Yuansong, LIU Hongge, JING Jiannong, CUI Xiangzhong, CUI Xiufang, JIN Guo. Tribological Properties of YSZ–CaF2–Al2O3 Coating Under Wide Temperature Range[J]. Aeronautical Manufacturing Technology, 2026, 69(5): 140-149.
2026, 
