Study on Space Copper-Based Powder Metallurgy Friction Material and its Tribological Properties

Ping Ping Yao; Ye Long Xiao; Jun Wang Deng

doi:10.4028/www.scientific.net/AMR.284-286.479

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 284-286Study on Space Copper-Based Powder Metallurgy...

Study on Space Copper-Based Powder Metallurgy Friction Material and its Tribological Properties

Abstract:

The microstructure and tribological properties of space copper-based friction material fabricated by Powder Metallurgy technology were studied using optical metallographic microscope and MM-1000-type tribo-tester, respectively. The results are shown as follows: The lubricant MoS₂ was resolved during sintering, resulting in the loss of S element. MoS₂ and its resolvents reacted with other components into some new compounds which contribute to the tribological properties of friction material. The lubrication mechanism of these new compounds showed essential difference in comparison to that for MoS₂; the friction coefficient was higher under atmospheric condition than that under vacuum conditions, but almost the same under low and high vacuum conditions. It decreased under both atmospheric and low vacuum conditions with the increase of load. The environmental temperature had insignificant effect on the friction coefficient; under atmospheric condition as load increased, the mass loss of material decreased linearly, then increased. With regard to low vacuum condition as load increased, the mass loss of material increased, then decreased; the stable coefficient of friction material under vacuum condition was higher than that under atmospheric condition.

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Periodical:

Advanced Materials Research (Volumes 284-286)

Pages:

479-487

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.284-286.479

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Online since:

July 2011

Authors:

Ping Ping Yao, Ye Long Xiao, Jun Wang Deng

Keywords:

Copper-Based Friction Material, Powder metallurgy, Space, Tribological Property

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