Deposition, structure and tribological behavior of silver-carbon nanocomposite coatings

Takanori Takeno; Hayato Saito; Minoru Goto; Julien Fontaine; Hiroyuki Miki; Michel Belin; Toshiyuki Takagi; Koshi Adachi

doi:10.1016/j.diamond.2013.07.004

Deposition, structure and tribological behavior of silver-carbon nanocomposite coatings

Takanori Takeno, Hayato Saito, Minoru Goto, Julien Fontaine, Hiroyuki Miki, Michel Belin, Toshiyuki Takagi, Koshi Adachi

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

20 Citations (Scopus)

Abstract

Silver-carbon nanocomposite coatings were deposited by plasma-enhanced chemical vapor deposition and d.c. magnetron sputtering of a silver target. Coatings with various metal concentrations were prepared by changing of acetylene and argon gas mixture ratio (C₂H₂/Ar), and concentrations of more than 40 at.%Ag was achieved in this study. Transmission electron microscope revealed that silver metallic grains with typically 15 nm were dispersed in amorphous carbon host matrix. Size of the grains increased with decrease of the gas mixture ratio due to secondary or triangularly formed metal grains. Tribological behavior of the coatings was investigated using reciprocating tribometer with in-situ electrical contact resistance measurement. Low and stable friction coefficient was achieved in the specimen with relatively low Ag concentration. Elemental mapping results on the ball after the friction tests reveal that tribofilm was formed on the ball when low and stable friction was achieved, and the tribofilm was mainly composed of C and Ag. It can be concluded that formation of the tribofilm is necessary for achieving low and stable friction.

Original language	English
Pages (from-to)	20-26
Number of pages	7
Journal	Diamond and Related Materials
Volume	39
DOIs	https://doi.org/10.1016/j.diamond.2013.07.004
Publication status	Published - 2013

Keywords

DLC
Silver
Tribological properties

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10.1016/j.diamond.2013.07.004

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title = "Deposition, structure and tribological behavior of silver-carbon nanocomposite coatings",

abstract = "Silver-carbon nanocomposite coatings were deposited by plasma-enhanced chemical vapor deposition and d.c. magnetron sputtering of a silver target. Coatings with various metal concentrations were prepared by changing of acetylene and argon gas mixture ratio (C2H2/Ar), and concentrations of more than 40 at.%Ag was achieved in this study. Transmission electron microscope revealed that silver metallic grains with typically 15 nm were dispersed in amorphous carbon host matrix. Size of the grains increased with decrease of the gas mixture ratio due to secondary or triangularly formed metal grains. Tribological behavior of the coatings was investigated using reciprocating tribometer with in-situ electrical contact resistance measurement. Low and stable friction coefficient was achieved in the specimen with relatively low Ag concentration. Elemental mapping results on the ball after the friction tests reveal that tribofilm was formed on the ball when low and stable friction was achieved, and the tribofilm was mainly composed of C and Ag. It can be concluded that formation of the tribofilm is necessary for achieving low and stable friction.",

keywords = "DLC, Silver, Tribological properties",

author = "Takanori Takeno and Hayato Saito and Minoru Goto and Julien Fontaine and Hiroyuki Miki and Michel Belin and Toshiyuki Takagi and Koshi Adachi",

note = "Funding Information: This work was supported by the Taiho Kogyo Research Foundation , and partly supported by the Scientific Research (C) ( 23560174 ) and core-to-core program “International research core on smart layered materials and structures for energy saving” by the Japan Society for the Promotion of Science, Japan . One of authors, Dr. T. Takeno, would like to express his gratitude to Mr. Yuichiro Hayasaka for his assistance to TEM and SEM observation in Institute for Material Research, Tohoku University, Japan. Authors express their thankful to Mr. Takeshi Sato for his assistance to the experiments in Institute of Fluid Science, Tohoku University, Japan.",

year = "2013",

doi = "10.1016/j.diamond.2013.07.004",

language = "English",

volume = "39",

pages = "20--26",

journal = "Diamond and Related Materials",

issn = "0925-9635",

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T1 - Deposition, structure and tribological behavior of silver-carbon nanocomposite coatings

AU - Takeno, Takanori

AU - Saito, Hayato

AU - Goto, Minoru

AU - Fontaine, Julien

AU - Miki, Hiroyuki

AU - Belin, Michel

AU - Takagi, Toshiyuki

AU - Adachi, Koshi

N1 - Funding Information: This work was supported by the Taiho Kogyo Research Foundation , and partly supported by the Scientific Research (C) ( 23560174 ) and core-to-core program “International research core on smart layered materials and structures for energy saving” by the Japan Society for the Promotion of Science, Japan . One of authors, Dr. T. Takeno, would like to express his gratitude to Mr. Yuichiro Hayasaka for his assistance to TEM and SEM observation in Institute for Material Research, Tohoku University, Japan. Authors express their thankful to Mr. Takeshi Sato for his assistance to the experiments in Institute of Fluid Science, Tohoku University, Japan.

PY - 2013

Y1 - 2013

N2 - Silver-carbon nanocomposite coatings were deposited by plasma-enhanced chemical vapor deposition and d.c. magnetron sputtering of a silver target. Coatings with various metal concentrations were prepared by changing of acetylene and argon gas mixture ratio (C2H2/Ar), and concentrations of more than 40 at.%Ag was achieved in this study. Transmission electron microscope revealed that silver metallic grains with typically 15 nm were dispersed in amorphous carbon host matrix. Size of the grains increased with decrease of the gas mixture ratio due to secondary or triangularly formed metal grains. Tribological behavior of the coatings was investigated using reciprocating tribometer with in-situ electrical contact resistance measurement. Low and stable friction coefficient was achieved in the specimen with relatively low Ag concentration. Elemental mapping results on the ball after the friction tests reveal that tribofilm was formed on the ball when low and stable friction was achieved, and the tribofilm was mainly composed of C and Ag. It can be concluded that formation of the tribofilm is necessary for achieving low and stable friction.

AB - Silver-carbon nanocomposite coatings were deposited by plasma-enhanced chemical vapor deposition and d.c. magnetron sputtering of a silver target. Coatings with various metal concentrations were prepared by changing of acetylene and argon gas mixture ratio (C2H2/Ar), and concentrations of more than 40 at.%Ag was achieved in this study. Transmission electron microscope revealed that silver metallic grains with typically 15 nm were dispersed in amorphous carbon host matrix. Size of the grains increased with decrease of the gas mixture ratio due to secondary or triangularly formed metal grains. Tribological behavior of the coatings was investigated using reciprocating tribometer with in-situ electrical contact resistance measurement. Low and stable friction coefficient was achieved in the specimen with relatively low Ag concentration. Elemental mapping results on the ball after the friction tests reveal that tribofilm was formed on the ball when low and stable friction was achieved, and the tribofilm was mainly composed of C and Ag. It can be concluded that formation of the tribofilm is necessary for achieving low and stable friction.

KW - DLC

KW - Silver

KW - Tribological properties

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VL - 39

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JO - Diamond and Related Materials

JF - Diamond and Related Materials

ER -

Deposition, structure and tribological behavior of silver-carbon nanocomposite coatings

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