Title

On Triboemission from the Sliding Contact of Si and Ge

Document Type

Article

Publication Date

1-1-2004

Publication Title

The Ann. of U. "Dunarea De Jos", Romania, Fasc.VIII (Tribology)

ISSN

1221-4590

Abstract

Experimental research work is presented seeking a better understanding of triboemission of negatively-charged particles from sliding contacts. Previous research by the authors found significant emission of electrons from diamond-on-alumina, diamond-on-sapphire and alumina-on-alumina during sliding contact and after contact ceased, while no emission was detected from diamond-on-aluminum systems. This study explores negative-charge intensity from the semiconductors silicon and germanium when they are scratched by a diamond pin in high vacuum. While significant triboemission was always detected during the sliding contact, emission was undetectable when contact ended. Emission intensity is substantially higher for diamond-on-Si than for diamond-on-Ge. Decreasing emission is observed when the same wear track is scratched in repeated passes. These results are discussed with a focus on surface mechanisms that have been postulated to explain triboemission.

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