ChemInform Abstract: Corrosion Resistance of Diamond-like Carbon-Coated Aluminum Films.

Diamond-like carbon (DLC) films have been intensively studied with a view to improving orthopaedic implants. Studies have indicated smoothness of the surface, low friction, high wear resistance, corrosion resistance and biocompatibility [1-4]. DLC coatings can be deposited using various techniques, such as plasma assisted chemical vapour deposition (PACVD), magnetron sputtering, laser ablation, and others [5]. However it has proved difficult to obtain films which exhibit good adhesion. The plasma immersion process, unlike the conventional techniques, allows the deposition of DLC on three-dimensional workpieces, even without moving the sample, without an intermediate layer, and with high adhesion [6], an important aspect for orthopaedic articulations. In our previous work, DLC coatings were deposited on silicon and Ti-13Nb-13Zr alloy substrates using the plasma immersion process for the characterization of microstructure, mechanical properties and corrosion behaviour [7-9]. Hardness, measured by a nanoindenter, ranged from 16.4-17.6 GPa, the pull test results indicate the good adhesion of DLC coatings to Ti-13Nb-13Zr, and electrochemical assays (polarization test and electrochemical impedance spectroscopy) indicate that DLC coatings produced by plasma immersion can improve the corrosion resistance [9].

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Enhancement of adhesion strength and corrosion resistance of nitrogen or platinum/ruthenium/nitrogen doped diamond-like carbon thin films by platinum/ruthenium underlayer

Diamond and Related Materials ◽

10.1016/j.diamond.2010.03.009 ◽

2010 ◽

Vol 19 (7-9) ◽

pp. 1065-1072 ◽

Cited By ~ 11

Author(s):

N.W. Khun ◽

E. Liu

Keyword(s):

Thin Films ◽

Corrosion Resistance ◽

Adhesion Strength ◽

Diamond Like Carbon ◽

Nitrogen Doped ◽

Carbon Thin Films

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Influence of Burnishing Conditions on Burnishing Force and Application of Coated Roller in Inclined Roller Burnishing

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.716.435 ◽

2016 ◽

Vol 716 ◽

pp. 435-442 ◽

Cited By ~ 1

Author(s):

Masato Okada ◽

Takuma Hirokawa ◽

Naoki Asakawa ◽

Masaaki Otsu

Keyword(s):

Carbon Steel ◽

Strain Gauge ◽

Diamond Like Carbon ◽

Force Component ◽

Tin Coating ◽

Workpiece Material ◽

Roller Burnishing ◽

Round Bar ◽

Carbon Coated ◽

Type 3

The influence of burnishing conditions on the burnishing force in the inclined roller burnishing method, which was developed by the authors, is investigated. The wear behaviors of non-coated and TiN- and Diamond-Like-Carbon-coated rollers and the effect of the coated roller on the inclined roller burnishing were also investigated. A round bar of carbon steel and an aluminum-based alloy were used as the workpiece material. The burnishing force was measured by a strain-gauge type 3-component dynamometer. The burnishing force component, which acts in the circumferential direction of the workpiece, increased with increasing inclination angle of the roller. Improvement of the tool life of the roller was obtained with a TiN-coated roller on which nitriding treatment of the base roller was performed prior to TiN coating. A satisfactory burnished surface was obtained by burnishing with the DLC-coated roller.

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