Friction coefficients and wear rates of MoS2/Cu, BN/Cu composites

Takashi Hashimoto, Hitoshi Kohri, Atsushi Yumoto, Ichiro Shiota

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

It is difficult to use an ordinary bearing in a vacuum and/or at a high temperature, because of evaporation or deterioration of the lubricant oil. A solid lubricant, M0S2 or BN, is promising in such condition. Recently, a thin solid lubricant film is often applied on a hard material by PVD or CVD. The thin film is, however, easily removed when the load or friction speed is too high. On the other hand, when the lubricant is dispersed in a matrix, the solid lubricant always exists even the surface of the bearing is worn out. The aim of this experiment is to examine friction properties of the composites. Cu was plated on the lubricant particles by electroless deposition. The lubricant volume fraction (hereafter Vf) was up to 30 vol%. The Cu plated lubricant powder was hot-pressed to form composites at 873 K under 30 MPa in a vacuum. Friction properties of composites were determined by using a ball-on-disk type testing machine. The test was performed either in air or in a vacuum without oil at the room temperature. The coefficients of dynamical friction of the composites were decreased by the lubricant in the air. The effect of the lubricant was much remarkable in vacuum. The wear rates of the composites were, however, larger than Cu in the air. On the contrary, the wear rates of the composites were much less than one of Cu in a vacuum.

Original languageEnglish
Title of host publicationCIMTEC 2008 - Proceedings of the 3rd International Conference on Smart Materials, Structures and Systems - Smart Materials and Micro/Nanosystems
Pages174-179
Number of pages6
Publication statusPublished - 2008 Dec 1
Externally publishedYes
Event3rd International Conference on Smart Materials, Structures and Systems - Smart Materials and Micro/Nanosystems, CIMTEC 2008 - Acireale, Sicily, Italy
Duration: 2008 Jun 82008 Jun 13

Publication series

NameCIMTEC 2008 - Proceedings of the 3rd International Conference on Smart Materials, Structures and Systems - Smart Materials and Micro/Nanosystems
Volume54

Conference

Conference3rd International Conference on Smart Materials, Structures and Systems - Smart Materials and Micro/Nanosystems, CIMTEC 2008
CountryItaly
CityAcireale, Sicily
Period08/6/808/6/13

Keywords

  • BN
  • Composites
  • Electroless deposition
  • Friction
  • MoS
  • Wear

ASJC Scopus subject areas

  • Mechanics of Materials
  • Materials Science(all)

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