Abstract
A series of the multicomponent thin films (binary: Ti-C; Ti-Ag and ternary: Ti-C-Ag; Ti-C-Al) were fabricated by Thermionic Vacuum Arc (TVA) technology in order to study the wear resistance and the anticorrosion properties. The effects of Ti amount on the microstructure, tribological and morphological properties were subsequently investigated. TVA is an original deposition method using a combination of anodic arc and electron gun systems for the growth of films. The samples were characterized using scanning electron microscope (SEM) and a transmission electron microscope (TEM) accompanied by selected area electron diffraction (SAED). Tribological properties were studied by a ball-on-disc tribometer in the dry regime and the wettability was assessed by measuring the contact angle with the See System apparatus. Wear Rate results indicate an improved sliding wear behavior for Ti-C-Ag: 1.31 × 10−7 mm3/N m (F = 2 N) compared to Ti-C-Al coating wear rate: 4.24 × 10−7 mm3/N m. On the other hand, by increasing the normal load to 3 N an increase to the wear rate was observed for Ti-C-Ag: 2.58 × 10−5 mm3 compared to 2.33 × 10−6 mm3 for Ti-C-Al coating.
Highlights
Surface engineering is quickly developing such that the surface modification of widespread used materials allows us to transform a material with poor properties into a functional product
Titanium is prone to wear because of its limited tribological properties, antifriction characteristics and the low hardness of the material restricts its use in engineering applications
The Thermionic Vacuum Arc (TVA) method uses an electron beam emitted by an externally heated cathode accelerated by a high anodic voltage [27,28,29]
Summary
Surface engineering is quickly developing such that the surface modification of widespread used materials allows us to transform a material with poor properties into a functional product. Titanium has many outstanding properties such as being excellent in corrosion resistance (even in seawater), high in strength (~1800 MPa), high in electric resistance, and excellent in biocompatibility [1,2,3]. These properties allow it to be used in numerous applications in the aerospace industry, building industry, sports material industry and as implants in a number of surgical procedures [4,5,6]. Titanium is prone to wear because of its limited tribological properties, antifriction characteristics and the low hardness of the material restricts its use in engineering applications.
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