J. Dryzek et al., STUDY OF SUBSURFACE ZONES INDUCED BY FRICTION AND WEAR USING POSITRON-ANNIHILATION METHOD, Applied surface science, 116, 1997, pp. 236-240
Citations number
10
Categorie Soggetti
Physics, Condensed Matter","Chemistry Physical","Materials Science, Coatings & Films
The positron annihilation studies of defect profiles in well annealed
gold and copper samples whose surfaces were exposed to the friction an
d wear processes are presented. In the case of copper samples the defe
ct profile was obtained by etching the layers and measuring the linesh
ape parameter of annihilation radiation. The defect profile detected i
n such a case exhibited the exponential decay dependence. For gold sam
ples the concentration of defects in the near surface laying region we
n obtained using the monoenergetic positrons. Close to the surface the
defect concentration is an order 10(-4) and the type of the defects a
s positron traps did not change with the depth.