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Controlled atmosphere dependent tribological properties of thermally annealed ultrananocrystalline diamond films

Tijdschriftbijdrage - Tijdschriftartikel

Tribological properties of ultrananocrystalline diamond (UNCD) films were investigated in the ambient atmospheric and high-vacuum in the dynamic transition of tribo-atmospheric condition. The UNCD film with trans-polyacetylene (t-PA) phase showed high friction value in the ambient atmospheric condition and this value became significantly less in the transition of atmosphere to high-vacuum. In contrast, thermally annealed similar UNCD film showed ultralow friction value in the ambient atmospheric condition and this value was high in the transition to high-vacuum tribo-condition. The UNCD film with t-PA phase oxidized in the ambient atmospheric tribological condition which was the main reason for high friction. However, intrinsic hydrogen present in the UNCD films passivated the dangling bonds in high-vacuum tribological condition. Chemical passivation of carbon dangling bonds was efficient for thermally annealed UNCD film in the ambient atmosphere and such passivation was restricted in the high-vacuum. Chemical analysis of the wear track was investigated by the Auger X-ray and X-ray photoelectron spectroscopies for revealing the comprehensive friction mechanisms.
Tijdschrift: DIAMOND AND RELATED MATERIALS
ISSN: 0925-9635
Volume: 97
Jaar van publicatie:2019
Trefwoorden:trans-polyacetylene, Tribofilm, Ultrananocrystalline diamond films, Ambient atmosphere and vacuum tribology, X-ray photoelectron and auger X-ray spectroscopy, Ultrananocrystalline diamondfilms, Ambient atmosphere and vacuum tribologyX-ray photoelectron and auger, X-rayspectroscopy
BOF-keylabel:ja
IOF-keylabel:ja
BOF-publication weight:1
CSS-citation score:1
Auteurs:International
Authors from:Government, Higher Education, Private
Toegankelijkheid:Closed