Study on Tribocorrosion Performance of the (TiNbMoZrW)C Coatings Prepared under Different Bias in Artificial Seawater

Abstract

As a kind of promising candidate materials in the field of corrosion protection，the multi-component carbide coatings have low friction coefficient，low wear rate and good corrosion resistance，but there are few studies on the tribocorrosion performance.In order to promote the application of the multi-component carbide coatings in seawater environment，the (TiNbMoZrW)C coatings were prepared via reactive magnetron sputtering under various pulse bias voltages.The microstructures and the mechanical properties of the (TiNbMoZrW)C coatings were systematically characterized by X-ray diffraction，X-ray photoelectron spectroscopy，atomic force microscope，scanning electron microscope，Vickers indentation and nano-indentation experiment.In addition，the electrochemical characteristics and friction and corrosion properties of coatings in artificial seawater were analyzed.Results showed that the pressure residual stress，hardness and elastic modulus of the prepared (TiNbMoZrW)C coating showed an increasing trend when the pulse bias increased from 0 to -800 V.The (TiNbMoZrW)C coating deposited under -800 V pulse bias had the maximum hardness (25.9 GPa) and the maximum elastic modulus (365.34 GPa)，excellent crack and corrosion resistance，which exhibited the lowest wear rate in artificial seawater [1.00×10-7mm3/(N·m)] and air [2.28×10-7mm3/(N·m)].Meanwhile，the application of higher pulse bias was beneficial to improve the tribocorrosion performance of the (TiNbMoZrW)C coatings in artificial seawater.

Keywords

• (tinbmozrw)c high-entropy alloy coating|carbide|bias|mechanical properties|tribocorrosion performance