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Title: In-situ tribochemical formation of self-lubricating diamond-like carbon films

Abstract

For this study, diamond-like carbon (DLC) films were tribochemically formed from ambient hydrocarbons on the surface of a highly stable nanocrystalline Pt-Au alloy. A sliding contact between an alumina sphere and Pt-Au coated steel exhibited friction coefficients as low as μ = 0.01 after dry sliding in environments containing trace (ppb) organics. Ex situ analysis indicated that the change in friction coefficient was due to the formation of amorphous carbon films, and Raman spectroscopy and elastic recoil analysis showed that these films consist of sp2/sp3 amorphous carbon with as much as 20% hydrogen. Transmission electron microscopy indicated these films had thicknesses exceeding 100 nm, and were enhanced by the incorporation of worn Pt-Au nanoparticles. The result was highly wear-resistant, low-friction DLC/Pt-Au nanocomposites. Atomistic simulations of hydrocarbons under shear between rigid Pt slabs using a reactive force field showed stress-induced changes in bonding through chain scission, a likely route towards the formation of these coatings. This novel demonstration of in situ tribochemical formation of self-lubricating films has significant impact potential in a wide range of engineering applications.

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1440393
Alternate Identifier(s):
OSTI ID: 1472253
Report Number(s):
SAND2018-9551J
Journal ID: ISSN 0008-6223; S0008622318305621; PII: S0008622318305621
Grant/Contract Number:  
AC04-94AL85000; NA0003525
Resource Type:
Published Article
Journal Name:
Carbon
Additional Journal Information:
Journal Name: Carbon Journal Volume: 138 Journal Issue: C; Journal ID: ISSN 0008-6223
Publisher:
Elsevier
Country of Publication:
United Kingdom
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; DLC; Diamond-like carbon; Hydrocarbons; In situ; Low friction; Tribochemistry

Citation Formats

Argibay, N., Babuska, T. F., Curry, J. F., Dugger, M. T., Lu, P., Adams, D. P., Nation, B. L., Doyle, B. L., Pham, M., Pimentel, A., Mowry, C., Hinkle, A. R., and Chandross, M. In-situ tribochemical formation of self-lubricating diamond-like carbon films. United Kingdom: N. p., 2018. Web. https://doi.org/10.1016/j.carbon.2018.06.006.
Argibay, N., Babuska, T. F., Curry, J. F., Dugger, M. T., Lu, P., Adams, D. P., Nation, B. L., Doyle, B. L., Pham, M., Pimentel, A., Mowry, C., Hinkle, A. R., & Chandross, M. In-situ tribochemical formation of self-lubricating diamond-like carbon films. United Kingdom. https://doi.org/10.1016/j.carbon.2018.06.006
Argibay, N., Babuska, T. F., Curry, J. F., Dugger, M. T., Lu, P., Adams, D. P., Nation, B. L., Doyle, B. L., Pham, M., Pimentel, A., Mowry, C., Hinkle, A. R., and Chandross, M. Tue . "In-situ tribochemical formation of self-lubricating diamond-like carbon films". United Kingdom. https://doi.org/10.1016/j.carbon.2018.06.006.
@article{osti_1440393,
title = {In-situ tribochemical formation of self-lubricating diamond-like carbon films},
author = {Argibay, N. and Babuska, T. F. and Curry, J. F. and Dugger, M. T. and Lu, P. and Adams, D. P. and Nation, B. L. and Doyle, B. L. and Pham, M. and Pimentel, A. and Mowry, C. and Hinkle, A. R. and Chandross, M.},
abstractNote = {For this study, diamond-like carbon (DLC) films were tribochemically formed from ambient hydrocarbons on the surface of a highly stable nanocrystalline Pt-Au alloy. A sliding contact between an alumina sphere and Pt-Au coated steel exhibited friction coefficients as low as μ = 0.01 after dry sliding in environments containing trace (ppb) organics. Ex situ analysis indicated that the change in friction coefficient was due to the formation of amorphous carbon films, and Raman spectroscopy and elastic recoil analysis showed that these films consist of sp2/sp3 amorphous carbon with as much as 20% hydrogen. Transmission electron microscopy indicated these films had thicknesses exceeding 100 nm, and were enhanced by the incorporation of worn Pt-Au nanoparticles. The result was highly wear-resistant, low-friction DLC/Pt-Au nanocomposites. Atomistic simulations of hydrocarbons under shear between rigid Pt slabs using a reactive force field showed stress-induced changes in bonding through chain scission, a likely route towards the formation of these coatings. This novel demonstration of in situ tribochemical formation of self-lubricating films has significant impact potential in a wide range of engineering applications.},
doi = {10.1016/j.carbon.2018.06.006},
journal = {Carbon},
number = C,
volume = 138,
place = {United Kingdom},
year = {2018},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1016/j.carbon.2018.06.006

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Cited by: 3 works
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    Works referencing / citing this record:

    Effect of Environment on Microstructure Evolution and Friction of Au–Ni Multilayers
    journal, January 2020