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Mechanical and wear behaviour of nanostructure tio2-ag coating on cobalt chromium alloys by air plasma spray and high velocity oxy-fuel

Hassim, M. H. and Idris, M. H. and Yajij, M. A. M. and Samion, S. (2019) Mechanical and wear behaviour of nanostructure tio2-ag coating on cobalt chromium alloys by air plasma spray and high velocity oxy-fuel. Journal of Materials Research and Technology, 8 (2). pp. 2290-2299. ISSN 2238-7854

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Official URL: https://dx.doi.org/10.1016/j.jmrt.2019.04.003

Abstract

Cobalt chromium alloys constitutes the base of one important group of biometallic with excellent mechanical properties. However, due to its non-bioactive and non-antimicrobial surface, cobalt chromium alloys are vulnerable to wear corrosive attack and bacterial infection. Hence, coating cobalt chromium alloys surface with superior biomaterials is the best proven techniques. In this work, nanostructure silver adopted titanium dioxide coating was deposited on cobalt chromium alloys using air plasma spray (APS) and high velocity oxy-fuel (HVOF) techniques. Nanostructure TiO2-Ag coating demonstrated superior hardness, wear resistance and lower coefficient of friction when compared to bare CoCr alloys. Reduced plastic deformation detected by microstructural analysis indicate that the interference of nano-structure coating in metallic matrix help lower the wear rate of the sample. Meanwhile, low porosity of the coating produced by HVOF technique shown a better wear resistance result than APS technique. © 2019 Brazilian Metallurgical, Materials and Mining Association.

Item Type:Article
Uncontrolled Keywords:surface properties, thermal spray coating method, wear performance
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Mechanical Engineering
ID Code:89667
Deposited By: Narimah Nawil
Deposited On:22 Feb 2021 01:44
Last Modified:22 Feb 2021 01:44

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