Accession Number : ADA132364

Title :   Measurement of Friction and Wear on Modified Surfaces.


PDF Url : ADA132364

Report Date : Aug 1983

Pagination or Media Count : 17

Abstract : The purpose of this study is to investigate two different ion implantation processes which increase the carbon concentration in Ti-implanted steels. Dry sliding friction and wear measurements were used to evaluate the processes and compare them to the original high fluence (50x10 to the 16th power/cm sq) high energy (190 keV) process. In one process, separate implantations of Ti and C were performed at energies resulting in similar depth distribution for Ti (190 keV) and C (50 keV) atoms. In the second, Ti was implanted at an energy considerably lower (50 keV) than used previously (190 keV). A recent study of the energy dependence of the Ti implantation process (11) has shown that at lower energies, vacuum carburization is initiated sooner and a more fully carburized layer is produced at a lower fluence. Compositions of surfaces implanted with Ti ions to a fluence of 2 x10 to the 17th power/cm sq will be presented in order to illustrate the effects of the processing methods on the Ti and C distributions. (Author)

Descriptors :   *Steel, *Wear, *Sliding friction, *Measurement, *Surface chemistry, Concentration(Chemistry), Ion implantation, Carbon, Titanium, Atoms, Energy, Distribution, Kinetic energy, Coefficients, Flux(Rate), Layers, Vacuum, Test methods

Subject Categories : Physical Chemistry
      Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE