Accession Number : AD0771449

Title :   Chemomechanical Control of Sliding Friction Behavior in Nonmetals.

Descriptive Note : Technical rept. (9th),

Corporate Author : MARTIN MARIETTA LABS BALTIMORE MD

Personal Author(s) : Macmillan,N. H. ; Huntington,R. D. ; Westwood,A. R. C.

Report Date : NOV 1973

Pagination or Media Count : 33

Abstract : Recent work has shown that surface active environments can be used to significantly and predictably influence the near-surface flow behavior (i.e., hardness) of such solids as magnesium oxide, calcite, alumina, quartz and soda-lime (s.l.) glass. Specifically, these solids are hardest in environments in which their zeta-potential is approximately zero. The results of the present study demonstrate that such chemomechanical effects can, under certain conditions, also be used to affect and control sliding friction behavior. In particular, it is shown that for magnesium oxide and s.l. glass in various environments the coefficient of friction mu(f) is a minimum when zeta approximately equals zero. This and other results are described, and some mechanistic and practical implications discussed. (Author)

Descriptors :   *Friction, *Nonmetals, Sliding, Surface active substances, Absorption, Hardness, Dislocations, Magnesium oxides, Glass

Subject Categories : Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE