Accession Number : ADA307541

Title :   Adhesion and Transfer of Polytetrafluoroethylene to Metals Studied by Auger Emission Spectroscopy.

Descriptive Note : Technical note,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CEN TER

Personal Author(s) : Pepper, Stephen V. ; Buckley, Donald H.

PDF Url : ADA307541

Report Date : OCT 1972

Pagination or Media Count : 24

Abstract : The adhesion and transfer of polytetrafluoroethylene (PTFE) to metals in ultrahigh vacuum have been studied by using Auger emission spectroscopy. The transfer was effected both by compressive static contact and by sliding contact. The transfer observed after static contact was independent of the chemical constitution of the substrate. Electron-induced desorption of the fluorine in the transferred PTFE showed that the fluorine had no chemical interaction with the metal substrate. The coefficient of friction on metals was independent of the chemical constitution of the substrate. However, sliding PTFE on soft metals, such as aluminum, generated wear fragments that lodged in the PTFE and machined the substrate. p2

Descriptors :   *METALS, *ADHESION, *TRANSFER, *AUGER ELECTRON SPECTROSCOPY, *TETRAFLUOROETHYLENE RESINS, INTERACTIONS, SUBSTRATES, ELECTRONS, ALUMINUM, FLUORINE, COEFFICIENTS, CHEMICAL REACTIONS, WEAR, EMISSION SPECTROSCOPY, STATICS, FRICTION, DESORPTION, FRAGMENTS, COMPRESSIVE PROPERTIES, ULTRAHIGH VACUUM, SLIDING CONTACTS.

Subject Categories : Polymer Chemistry
      Organic Chemistry
      Physical Chemistry
      Adhesives, Seals and Binders
      Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE