Si/Al复合溶胶基耐高温润滑涂层的宽温域润滑行为研究

doi:10.11896/cldb.25080164

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Abstract The rapid advancement of modern aerospace has rendered solid lubricating coatings with stable wide-temperature performance a critical technical bottleneck for ensuring the reliability of core friction components. Bonded solid lubricating coatings, known for their cost-effectiveness, demonstrate considerable potential for enhancing the lubrication and wear resistance of high-temperature moving parts across a broad temperature range. In this study, a high-temperature lubricating coating was designed and prepared using a sol-gel method based on a Si/Al composite sol. The structure and thermal stability of the composite sol were characterized. The influence of the Al/Si molar ratio (0.1—0.5) on the coating microstructure and tribological performance was comprehensively evaluated. High-temperature friction and wear tests combined with worn surface analysis, were conducted to clarify the lubrication failure mechanism of the coating over a broad temperature range. The results indicate that the prepared coatings exhibit favorable tribological properties, maintaining an average friction coefficient below 0.25 alongside excellent wear resis-tance from 25 to 500 ℃. The coating with an Al/Si molar ratio of 0.3 achieved the lowest friction coefficient and wear rate, demonstrating optimal comprehensive performance. This study may provide a novel technical approach and theoretical foundation for overcoming the high-temperature performance limitations of bonded solid lubricating coatings.

Key words： sol-gel method silicon aluminum composite sol wide temperature range lubrication lubricating mechanism

Published: 10 September 2026 Online: 2026-09-22

CLC number:

TQ630

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	Articles by authors
	SUN Huajian
	ZHANG Dingjun
	CHEN Lei
	ZENG Jia
	MA Wenfei
	CHEN Jianmin

Cite this article:

SUN Huajian,ZHANG Dingjun,CHEN Lei, et al. Lubrication Behaviors of Si/Al Composite Sol-based High Temperature Resistant Lubricating Coatings in a Wide Temperature Range[J]. Materials Reports, 2026, 40(17): 25080164-7.

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https://www.mater-rep.com/EN/10.11896/cldb.25080164 OR https://www.mater-rep.com/EN/Y2026/V40/I17/25080164

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