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나노물질 및 화학반응 연구단
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Tribochemistry of contact interfaces of nanocrystalline molybdenum carbide films

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Title
Tribochemistry of contact interfaces of nanocrystalline molybdenum carbide films
Author(s)
Kumar D.D.; Kumar N.; Kalpataru Panda; Kamalan Kirubaharan A.M.; Kuppusami P.
Publication Date
2018-07
Journal
APPLIED SURFACE SCIENCE, v.447, no., pp.677 - 686
Publisher
ELSEVIER SCIENCE BV
Abstract
Transition metal carbides (TMC) are known for their improved tribological properties and are sensitive to the tribo-atmospheric environment. Nanocrystalline molybdenum carbide (MoC) thin films were deposited by DC magnetron sputtering technique using reactive CH4 gas. The friction and wear resistance properties of MoC thin films were significantly improved in humid-atmospheric condition as compared to high-vacuum tribo-condition. A comprehensive chemical analysis of deformed contact interfaces was carried out by X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDX) and Raman spectroscopy. XPS and Raman spectroscopy showed the formation of stable molybdenum-oxide (MoO), molybdenum carbide (MoC) and amorphous carbon (a-C) tribo-phases. Moreover, during the sliding in humid-atmospheric condition, these phases were extensively deposited on the sliding steel ball counter body which significantly protected against undesirable friction and wear. © 2018 Elsevier B.V
URI
https://pr.ibs.re.kr/handle/8788114/4476
ISSN
0169-4332
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
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