Dynamic friction behavior of ultrananocrystalline diamond films: A depth-resolved chemical phase analysis

Kalpataru Panda; Revati Rani; Niranjan Kumar; Kamatchi Jothiramalingam Sankaran; Jeong Young Park; K. Ganesan; I. Nan Lin

doi:10.1016/j.ceramint.2019.08.045

Dynamic friction behavior of ultrananocrystalline diamond films: A depth-resolved chemical phase analysis

Kalpataru Panda, Revati Rani, Niranjan Kumar^*, Kamatchi Jothiramalingam Sankaran, Jeong Young Park, K. Ganesan, I. Nan Lin

^*Corresponding author for this work

Department of Physics, Manipal Institute of Technology, Manipal

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	23418-23422
Number of pages	5
Journal	Ceramics International
Volume	45
Issue number	17
DOIs	https://doi.org/10.1016/j.ceramint.2019.08.045
Publication status	Published - 01-12-2019

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.ceramint.2019.08.045

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title = "Dynamic friction behavior of ultrananocrystalline diamond films: A depth-resolved chemical phase analysis",

abstract = "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.",

author = "Kalpataru Panda and Revati Rani and Niranjan Kumar and Sankaran, {Kamatchi Jothiramalingam} and Park, {Jeong Young} and K. Ganesan and Lin, {I. Nan}",

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year = "2019",

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doi = "10.1016/j.ceramint.2019.08.045",

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T1 - Dynamic friction behavior of ultrananocrystalline diamond films

T2 - A depth-resolved chemical phase analysis

AU - Panda, Kalpataru

AU - Rani, Revati

AU - Kumar, Niranjan

AU - Sankaran, Kamatchi Jothiramalingam

AU - Park, Jeong Young

AU - Ganesan, K.

AU - Lin, I. Nan

PY - 2019/12/1

Y1 - 2019/12/1

N2 - 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.

AB - 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.

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Dynamic friction behavior of ultrananocrystalline diamond films: A depth-resolved chemical phase analysis

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