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RESEARCH PAPERS

Lubrication at High Temperatures With Vapor-Deposited Surface Coatings

[+] Author and Article Information
D. J. Baldwin, G. W. Rowe

Tube Investments Research Laboratories, Hinxton Hall, Cambridge, England

J. Basic Eng 83(2), 133-138 (Jun 01, 1961) (6 pages) doi:10.1115/1.3658903 History: Received July 07, 1960; Online November 03, 2011

Abstract

An experimental study of the friction of metals which have been coated with inorganic films by reaction with their surrounding atmosphere. The specimens are first cleaned at high temperature in vacuo and then heated in the selected reactive vapor. Many coatings will prevent seizure and give a fairly constant but high coefficient of friction up to high temperatures. Layer-lattice compounds such as MoS2 , CrCl3 , and TiI2 give much lower friction at all temperatures below those at which the film decomposes or evaporates (about 850 C for molybdenum disulphide). A film of boron nitride formed on boron shows a high intrinsic friction, but this can be reduced by certain vapors or by raising the temperature above about 800 C. Most of the experiments were performed with very light loads but the films are shown to be effective under kilogram loads. A simple indentation test capable of selecting lubricants under loads up to 12 tons is described. This shows that a film formed by heating stainless steel in CCl2 F2 will lubricate at 400 C when the steel is deformed by over 50 per cent.

Copyright © 1961 by ASME
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