Solid particle erosion and corrosion resistance performance of nanolayered multilayered Ti/TiN and TiAl/TiAlN coatings deposited on Ti6Al4V substrates

Bonu, V and Jeevitha, M and Praveen Kumar, V and Srinivas, G and Siju, - and Barshilia, Harish C (2020) Solid particle erosion and corrosion resistance performance of nanolayered multilayered Ti/TiN and TiAl/TiAlN coatings deposited on Ti6Al4V substrates. Surface and Coatings Technology, 387. ISSN 02578972

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Abstract

Solid particle erosion by air born dust particles and corrosion by humid air and sea salt cause severe damage to the gas turbine blades and wind turbines. Combination of erosion and corrosion accelerates the damage process compared to the individual effects. The damage leads to the economic loss, pollution and low safety. In order to protect these components, ultra-thin multilayered erosion and corrosion resistant Ti/TiN and TiAl/TiAlN coatings with stress absorbing layers were developed on Ti6Al4V substrates using un-balanced magnetron sputtering process. Erosion resistance of Ti/TiN and TiAl/TiAlN coatings was tested according to the ASTM-G76-13 standards at four different impinging angles: 90°, 60°, 45° and 30°. Erosion tests were conducted at 400 °C with increasing erodent velocity (30 to 90 m/s) using alumina and silica erodent particles. Average erosion resistance of Ti/TiN and TiAl/TiAlN coatings was significantly higher than Ti6Al4V substrate. Corrosion resistance of the coatings was found to be almost one order better than Ti6Al4V substrate in 3.5% NaCl solution. Morphology and spectroscopic analysis of the erosion scars were studied using field emission scanning electron microscopy and micro-Raman spectroscopy, respectively. Chemical stability of TiAl/TiAlN was found to be better than Ti/TiN in 3.5% NaCl solution.

Item Type: Article
Uncontrolled Keywords: Ti/TiN multilayers TiAl/TiAlN multilayers Ti6Al4V Erosion Corrosion Nanolayered multi-layered coatings
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
CHEMISTRY AND MATERIALS > Inorganic, Organic and Physical Chemistry
Depositing User: Smt Bhagya Rekha KA
Date Deposited: 16 Sep 2021 14:08
Last Modified: 16 Sep 2021 14:08
URI: http://nal-ir.nal.res.in/id/eprint/13466

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