Accession Number : AD0781768

Title :   The Effect of the Composition of Gaseous Media on the Friction of Graphitic Materials,

Corporate Author : ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (ENGLAND)

Personal Author(s) : Plutalova,L.

Report Date : 21 FEB 1974

Pagination or Media Count : 12

Abstract : The friction and wear properties of a graphitic carbon sliding against steel have been measured in vacuum and in air, oxygen, nitrogen, argon and helium. The influence of water vapour has been studied in helium over a concentration range from 1 x 10 to the minus 20th power to 17.3 g/cu m. In dried gases, high friction and wear - 'dusting' - are obtained only when the nominal surface pressure exceeds a critical value. Below this value, the friction and wear remain low, even in vacuum at high temperatures. The results conflict with Savage's hypothesis of 'dusting', it is suggested that mechanical factors are more important than adsorption phenomena in the transition to 'dusting'.

Descriptors :   *Graphite, Friction, Wear, Gases, Sliding, Air, Helium, Argon, Nitrogen, Oxygen, Water vapor, Translations, USSR

Subject Categories : Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE