Ultrasound effects on the tribological properties of synthesized diamond films
作者:
V. Snitka,
V. J. Trava‐Airoldi,
V. Baranauskas,
期刊:
Journal of Vacuum Science&Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena
(AIP Available online 1995)
卷期:
Volume 13,
issue 5
页码: 2124-2129
ISSN:1071-1023
年代: 1995
DOI:10.1116/1.588087
出版商: American Vacuum Society
关键词: DIAMONDS;FILMS;FRICTION;OXIDATION;ROUGHNESS;SURFACE TREATMENTS;SYNTHETIC MATERIALS;ULTRASONIC WAVES;WEAR RESISTANCE;diamonds
数据来源: AIP
摘要:
The friction and wear behavior of chemical vapor deposition grown diamond films has been investigated under strong ultrasound conditions at the friction interface. Experiments were performed on an alternating ‘‘pin‐on‐plate’’ tribometer constructed as an ultrasonic motor with excited bimodal mechanical vibrations at the frequency of 20 kHz. Ultrasound sliding of the films was done against alumina ceramics and with the diamond film itself. We have shown that chemical vapor deposition diamond films can be fast polished mechanically without significant graphitization by ultrasonic treatment. The initial film roughness was reduced from an averageRa≊3000 nm toRa≊10 nm. The polishing decreased the static coefficient of friction of the diamond film from about 0.53 to about 0.12. The operative mechanism for the polishing in the case of initially rough diamond samples appears to be asperity fracture. For smooth diamond samples it is suggested that tribochemical oxidation is also a polishing mechanism.
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