NDLI: Relationship between electrical-tribological behavior and properties of sliding surfaces of copper containing diamond-like carbon nanocomposite coated plate and brass ball

Content Provider	IEEE Xplore Digital Library
Author	Hombo, Ryoichi Kato, Naoki Nozu, Takahiro Inayoshi, Naruhiko Fontaine, Julien Belin, Michel Miki, Hiroyuki Takagi, Toshiyuki Takeno, Takanori
Copyright Year	2014
Description	Author affiliation: Graduate School of Engineering Tohoku University Aoba 6-6-1 Aramaki Aoba-ku Sendai, MIYAGI 980-857, Japan (Takeno, Takanori) \|\| Laboratoire de Tribologie et Dynamique des Systèmes Ecole Centrale de Lyon, UMR CNRS 5513 36, avenue Guy de Collongue, 69134 Ecully cedex, France (Fontaine, Julien; Belin, Michel) \|\| Center for Interdisciplinary Research Tohoku University Aramaki aza Aoba 6-3 Aoba-ku Sendai, MIYAGI 980-8578, Japan (Miki, Hiroyuki) \|\| Materials Engineering R&D Division DENSO CORPORATION 1-1 Showa-cho Kariya, AICHI 448-8661, Japan (Hombo, Ryoichi; Kato, Naoki; Nozu, Takahiro; Inayoshi, Naruhiko) \|\| Institute of Fluid Science Tohoku University 2-1-1 Katahira, Aoba-ku, Sendai, MIYAGI 980-8577, Japan (Takagi, Toshiyuki)
Abstract	Reducing the electrical contact resistance (ECR) and the coefficient of friction (CoF) are major technological requirements for sliding contacts. This report provides electrical-tribological characteristics of a Copper containing Diamond-like Carbon (Cu-DLC) nanocomposite coating deposited on a brass plate, investigated by using a ball/plate reciprocating tribometer. The counterpart was a brass ball. While the initial ECR was hundreds of milliohms, it gradually decreased with cycles and reached approximately 2 milliohms after 600 cycles. CoF started below 0.35 and decreased progressively, and stabilized around 0.25 after 600 cycles. The good electrical-tribological characteristics lasted up to approximately 7500 cycles and CoF increased rapidly after. Sliding surfaces at different cycles were analyzed by optical microscope, laser-scanning microscope, EDX, TEM and nanoindentation. The results of analyses revealed that a copper-rich tribofilm was built up on the ball, which grew with cycles. The Cu-DLC wore gradually and its substrate was exposed after less than 1000 cycles. Nevertheless, detrimental effects were not observed either on ECR or on CoF up to 7500 cycles. The unique structures and properties of the tribofilm and the worn Cu-DLC surface are discussed, attempting to account for their key roles on the good characteristics.
Starting Page	1
Ending Page	5
File Size	1956845
Page Count	5
File Format	PDF
e-ISBN	9781479960682
DOI	10.1109/HOLM.2014.7031052
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-10-12
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Copper Substrates Contacts Friction Coatings Diamond-like carbon friction sliding contact tribology diamond-like carbon coating
Content Type	Text
Resource Type	Article

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