TRIBOLOGICAL PROPERTIES OF TiO2/SiO2 DOUBLE LAYER COATINGS DEPOSITED ON CP-Ti

O. Çomakli, M. Yazici, T. Yetim, A. F. Yetim and A. Çelik
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O. Çomakli: Department of Mechanical Engineering, Ataturk University, Erzurum, Turkey
M. Yazici: #x2020;High Technology Research Centre, Erzurum Technical University, Erzurum, Turkey
T. Yetim: #x2021;Department of Chemical Engineering, Erzurum Technical University, Erzurum, Turkey
A. F. Yetim: #xA7;Department of Mechanical Engineering, Erzurum Technical University, Erzurum, Turkey
A. Çelik: Department of Mechanical Engineering, Ataturk University, Erzurum, Turkey

Surface Review and Letters (SRL), 2017, vol. 24, issue 06, 1-7

Abstract: In the present paper, the influences of different double layer on wear and scratch performances of commercially pure Titanium (CP-Ti) were investigated. TiO2/SiO2 and SiO2/TiO2 double layer coatings were deposited on CP-Ti by sol–gel dip coating process and calcined at 750∘C. The phase structure, cross-sectional morphology, composition, wear track morphologies, adhesion properties, hardness and roughness of uncoated and coated samples were characterized with X-ray diffraction, scanning electron microscopy (SEM), nano-indentation technique, scratch tester and 3D profilometer. Also, the tribological performances of all samples were investigated by a pin-on-disc tribo-tester against Al2O3 ball. Results showed that hardness, elastic modulus and adhesion resistance of double layer coated samples were higher than untreated CP-Ti. It was found that these properties of TiO2/SiO2 double layer coatings have higher than SiO2/TiO2 double layer coating. Additionally, the lowest friction coefficient and wear rates were obtained from TiO2/SiO2 double layer coatings. Therefore, it was seen that phase structure, hardness and film adhesion are important factors on the tribological properties of double layer coatings.

Keywords: Double layer coating; sol–gel; wear; scratch; Cp-Ti (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1142/S0218625X17500822

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