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Kalpataru Panda
나노물질 및 화학반응 연구단
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Dynamic friction behavior of ultrananocrystalline diamond films: A depth-resolved chemical phase analysis

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Title
Dynamic friction behavior of ultrananocrystalline diamond films: A depth-resolved chemical phase analysis
Author(s)
Kalpataru Panda; Revati Rani; Niranjan Kumar; Kamatchi Jothiramalingam Sankaran; Jeong Young Park; K. Ganesan; I-Nan Lin
Publication Date
2019-12
Journal
CERAMICS INTERNATIONAL, v.45, no.17, pp.23418 - 23422
Publisher
ELSEVIER SCI LTD
Abstract
© 2019 Elsevier Ltd and Techna Group S.r.l.Investigation of dynamic changes in friction behavior of ultrananocrystalline diamond (UNCD) films is a complex mainly because of the rapid change in chemical composition at the sliding interfaces. To address this issue, for the first time, we report chemical phase analysis of transferfilm using the depth-resolved X-ray photoelectron spectroscopy (XPS) technique. The friction coefficient of the UNCD films was high during the initial run-in regime, but it gradually decreased to an ultralow value after longer sliding cycles at the ambient atmospheric tribo-condition. Depth-resolved XPS analysis showed a higher sp3/sp2 carbon ratio during the initial run-in regime. This ratio decreased with increasing sliding cycles and consequently the friction coefficient decreased. However, a higher value of the friction coefficient throughout the run-in regime persisted at the high-vacuum tribo-condition. In this case, the sp3/sp2 carbon ratio inside the transferfilm was quite high and no considerable changes were observed in the depth-resolved XPS analysis. This investigation confirmed that the dynamic friction behavior in UNCD films was manipulated by the sp3/sp2 carbon ratio inside the transferfilm which showed tribo-atmospheric dependence
URI
https://pr.ibs.re.kr/handle/8788114/6256
ISSN
0272-8842
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
Files in This Item:
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