溶胶-凝胶法制备聚酰胺-酰亚胺粘结MoS2/SiOx固体润滑涂层及其真空摩擦学性能研究

doi:10.11896/cldb.22050078

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Abstract Anonaqueous sol-gel route is introduced to prepare polyamide-imide bonded MoS₂/SiO_x dry film lubricant, so as to improve the tribological performances of the lubricants which were used on the components of the spacecraft. The sol-gel process was started from tetraethoxysilane (TEOS) and KH-560 hydrolyzing in N,N-dimethylacetamide. After the solution mixing with polyamide-imide and MoS₂, the paint of the dry film lubricant was sprayed onto the G95Cr18 substrate. The dry film lubricants were obtained by the curing of polyamide-imide and polycondensation of the sol-gel. The chemical composition of the dry film lubricants were studied by Fourier transform infrared spectroscopy. The thermal properties of the dry film lubricants were characterized by thermogravimetric analysis and differential scanning calorimetry. A vacuum ball-on-disk friction and wear tester was used to evaluate the tribological behavior. The wear tracks were characterized by scanning electron microscope. Results show that some of the epoxy groups in the silica gel have reacted with the PAI binder. The silica element in the dry film lubricants showed uniform distribution. The SiO_x grafted with PAI during the film lubricants curing, which increases the compatibility of the two phases. The thermal stability and the glass transition temperature of the film lubricants increased with increasing SiO_x content. The wear resistance property was evidently enhanced when the amount of SiO_x reached to 2.0wt%. The friction coefficient and worn rate in vacuum decreased profiting from the rolling effect of the SiO_x and high strength of the film lubricants when the SiO_x was introduced into the film.

Key words： polyamide-imide sol-gel dry film lubricant vacuum tribological performance

Published: 25 November 2022 Online: 2022-11-25

CLC number:

TG174.422

Fund:Key Laboratory of Vacuum Technology and Physics Fund Project (6142207040101).

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	Articles by authors
	HUO Lixia
	GOU Shining
	GUO Fangjun
	HE Ying
	FENG Kai
	ZHOU Hui
	ZHANG Kaifeng

Cite this article:

HUO Lixia,GOU Shining,GUO Fangjun, et al. Study on the Vacuum Tribological Performance of Polyamide-imide Bonded MoS₂/SiO_x Dry Film Lubricant Prepared by Sol-Gel Process[J]. Materials Reports, 2022, 36(22): 22050078-5.

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http://www.mater-rep.com/EN/10.11896/cldb.22050078 OR http://www.mater-rep.com/EN/Y2022/V36/I22/22050078

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