Accession Number : AD0716525

Title :   Effect of Boron Nitride on Friction and Wear of Tungsten,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Dzhafarov,Ya A.

Report Date : 04 SEP 1970

Pagination or Media Count : 11

Abstract : Tests were made on friction and wear for W plus 10, 15, and 20 percent BN. Tests were made at given slip rates. The friction path was 10,500m. The low wear value for all of the tested compounds is due to the presence of a solid phase in the form of W boride. The decrease in the friction coefficient with increasing pressure, observed for the W plus 15 percent BN sample, is due to an intensification of the separation of the nitride phase and its dissociation products during the friction process. The decomposition of the nitride goes more slowly for increasing pressure than for increasing slip rate, which is related with the specific difference in the effect of rate and pressure on the friction temperature. Increasing the amount of B nitride over 15 percent does not improve the antifriction properties of the pair. (Author)

Descriptors :   (*TUNGSTEN, LUBRICANTS), (*NITRIDES, *LUBRICANTS), BORON COMPOUNDS, WEAR RESISTANCE, HEAT RESISTANT MATERIALS, USSR

Subject Categories : Lubricants and Hydraulic Fluids

Distribution Statement : APPROVED FOR PUBLIC RELEASE