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Wear Properties of DLC and Plasma Sprayed WC Structure Coating

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Abstract:

Diamond-like carbon film (DLC) with an interlayer of plasma sprayed tungsten-carbide (WC) was prepared on an aluminum alloy substrate (A5052) by a hybrid process of plasma-based ion implantation and deposition using hydrocarbon gas. Typical thicknesses of DLC and WC films were 1 μm and 100 μm, respectively. The hardness and friction coefficient of DLC were typically 15 GPa and 0.15, respectively. The durability of DLC/WC/A5052 system was evaluated from the measurement of the friction coefficient by a ball-on-disk friction tester in which the loaded ball was drawn repeatedly across a sample and the load was increased with each traverse. For the DLC/A5052 system, which has no WC interlayer, the DLC film was broken quickly because of distortion of the substrate. For the DLC/WC/A5052 system, on the other hand, the DLC film was excellent in durability for long running. The wear rate of rubber rotor to the metal rotor was measured by a roller-pitching-type wear testing machine, showing large reduction in wear rate using DLC-coated metal rotor.

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Periodical:

Solid State Phenomena (Volume 127)

Pages:

245-250

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.127.245

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Online since:

September 2007

Authors:

Mitsuyasu Yatsuzuka, Yoshihiro Oka, Akifumi Tomita, Noritaka Murata, Mitsuaki Hirota

Keywords:

Diamond-Like Carbon (DLC), Durability, Multilayer Film, Plasma Sprayed WC, Plasma-Based Ion Deposition, Plasma-Based Ion Implantation, Wear Property

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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