Enhancement in corrosion resistance and vibration damping performance in titanium by titanium nitride coating
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Enhancement in corrosion resistance and vibration damping performance in titanium by titanium nitride coating Kaushik Sarkar1 · Panupong Jaipan1 · Jonghyun Choi2 · Talisha Haywood1 · Duy Tran1 · Nikhil Reddy Mucha1 · Sergey Yarmolenko1 · Onome Scott‑Emuakpor3 · Mannur Sundaresan1 · Ram K. Gupta2 · Dhananjay Kumar1 Received: 27 January 2020 / Accepted: 15 April 2020 © Springer Nature Switzerland AG 2020
Abstract Titanium nitride (TiN) thin films are deposited on titanium (Ti) substrates by pulsed laser deposition and radio frequency magnetron sputtering. The main goal of this research is to improve the corrosion resistance and the vibration damping performance of the Ti substrates by surface modification of the substrates with TiN thin film coatings. Electrochemical results indicate that TiN films bring about a significant improvement in the corrosion resistance of the Ti disks in phosphate buffer saline solution. It is also observed that TiN deposited at room temperature has the best corrosion efficiency in terms of lower corrosion current density and more positive corrosion potential. From the damping measurements, it is observed that the damping ratios of the TiN-coated beams are one to two orders of magnitude greater than those of uncoated ones. Additionally, the damping amplitudes of the TiN coated beams have been observed to return to zero position faster than the uncoated beam. The energy dissipation due to internal friction at the beam-coating interface and inter-lamellae interface within TiN coatings can be the mechanism responsible for reducing vibration amplitudes of TiN-coated beams. Keywords Titanium nitride film · Polarization · Electrochemical impedance spectroscopy · Vibration damping · RF magnetron sputtering · Pulsed laser deposition
1 Introduction Vibration fatigue failures of the components have become a central problem in the aerospace industry [1, 2]. The principal cause of the failure arising from the vibrations in aircraft engine components is considered as high cycle fatigue (HCF) [1–5]. The HCF fatigue can cause unpredictable catastrophes in engine turbine blades as a result of the effect of high-frequency vibratory loading [6]. Currently, researchers are focusing on surface modification with the aid of hard coating materials as one of the potential means to reduce this fatiguefailure in the aircraft engine components [1, 2, 5, 7–9].
When applied on the surface of components, hard coating can reduce resonant vibration levels by absorbing or dissipating energy and increasing the fatigue life of the components. The energy absorption/dissipation process is originated at internal defects, intergranular and substrate-coating interfaces, and dislocation motion [1, 10, 11]. Popular damping material, such as viscoelastic polymers, has temperature limitation and low stability in harsh working conditions [2]. Since the vibration dissipation mechanism does not depend only on the viscoelasticity, more thermally stable materials can be used as a suitable damper [12]. Some of the popular hard coatin
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