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Abstract
A procedure is described for accumulating data on the friction index and compression ratio of a copper powder at different stages of oxidation and of screened fractions of a stainless-steel powder. The dimensionless and nameless powder property, friction index divided by the compression ratio, was constant under certain conditions for a regular series of size fractions of stainless-steel powder. Calculations were made of the coefficient of compression and the limiting value of the degree of volume change by the method due to Kawakita.
Notes
* Manuscript received 22 May 1969. Contribution to a Symposium on “Lubrication, Friction, and Wear (Tribology) in Powder Metallurgy” to be held in Eastbourne on 24-26 November 1969.