Evaluation of Friction Durability of Extremely Thin Diamond-Like Carbon Films by Statistical Cluster and Regression Analyses of Friction Coefficient

We studied the tribological properties of extremely thin DLC films at high temperature. The films were deposited on nickel phosphorus (NiP) or Si substrates using filtered cathodic vacuum arc (FCVA) or plasma chemical vapor deposition (P-CVD). The nanoindentation hardness values and elastic moduli o...

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Bibliographic Details
Published in:Tribology Online 2021/04/15, Vol.16(2), pp.113-124
Main Authors: Miyake, Shojiro, Miyake, Masatoshi
Format: Article
Language:English
Subjects:
Adsorbates
Arc deposition
Chemical vapor deposition
Cluster analysis
Coefficient of friction
Diamond films
diamond-like carbon
Diamond-like carbon films
Durability
extremely thin film
film substrate
Friction
Friction reduction
High temperature
high-temperature tribological durability
Mechanical properties
Modulus of elasticity
Nanoindentation
Room temperature
Silicon substrates
Statistical analysis
statistical cluster analysis of frictioncoefficient
Thin films
Tribology
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Summary:We studied the tribological properties of extremely thin DLC films at high temperature. The films were deposited on nickel phosphorus (NiP) or Si substrates using filtered cathodic vacuum arc (FCVA) or plasma chemical vapor deposition (P-CVD). The nanoindentation hardness values and elastic moduli of the films were lower on NiP than on Si. The nanofriction force of the FCVA-DLC film on NiP was low at room temperature, but very high at high temperature. In this hard film, the lubricous adsorbate was removed by sliding at high temperature, making it easily damaged through the large deformation of NiP. In contrast, the friction force of the P-CVD-DLC films on both substrates was low at high temperatures. In this case, the lubricous tribochemical products from the P-CVD-DLC film reduced friction and wear. The friction map dependences on load and number of reciprocating cycles were evaluated using a friction test and statistical cluster analysis. The friction durability of both films depended more strongly on load on NiP than on Si, with the friction coefficients on Si being almost independent of load. At high temperatures and load, the durability of the FCVA-DLC film on NiP decreased and this film was easily damaged.
ISSN:1881-2198
1881-218X
1881-2198
DOI:10.2474/trol.16.113