Accession Number : ADA133527

Title :   The Influence of Surface Roughness on the Transfer and Wear of Polymers.

Descriptive Note : Final rept. 14 Apr 80-13 Aug 83,

Corporate Author : VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG

Personal Author(s) : Eiss,Norman S , Jr

PDF Url : ADA133527

Report Date : 30 Sep 1983

Pagination or Media Count : 17

Abstract : Wear mechanisms of polymer sliding systems were studied. The wear rates of rigid polyvinyl chloride and low density polyethylene pins sliding on ground steel disks decreased as the average asperity curvature and the depth of penetration of the asperities in the polymer decreased. Observation of the sliding of polycarbonate and polyvinly chloride disks against model asperities in the scanning electron microscope showed that elastic and plastic flow of the polymers around the asperities was much more evident than the formation of wear particles by fracture. A steel ball sliding on polycarbonate, polyvinyl chloride, polyethyleneterephthalate, and three polymides required 20 to 550 cycles of sliding before wear particles started to form. The fatigue wear of polymide films on steel substrates in a ball on polymide test was lowest for the polymide with the lowest t sug g, and lowest modulus. The wear of polytetrafluoroethylene was found to decrease as the molecular weight and crystallinity increased. The wear debris had lower molecular weight but slightly increased crystallinity. (Author)

Descriptors :   *POLYMERS, *WEAR RESISTANCE, *SLIDING CONTACTS, POLYVINYL CHLORIDE, POLYETHYLENE PLASTICS, PINS, DISKS, SURFACE ROUGHNESS, SLIDING FRICTION, WEAR, FATIGUE(MECHANICS), CURVATURE

Subject Categories : Plastics
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE