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Feng K.,Shanghai JiaoTong University | Li Z.,Shanghai JiaoTong University | Sun H.,Teer Coatings Ltd. | Yu L.,Zhejiang Huijin Teer Coatings Co. | And 3 more authors.
Journal of Power Sources

The two most important issues that plague wider use of stainless steel bipolar plates in polymer electrolyte membrane fuel cells (PEMFCs) are insufficient corrosion resistance and surface conductivity. In this study, C/CrN multilayer coatings are deposited on 316L stainless steel samples by close-field unbalanced magnetron sputtering ion plating. SEM shows that the C/CrN coatings are dense, continuous, and composing of carbon granules on the surface. Raman spectroscopy reveals an amorphous structure with a large sp 2 constituent. The corrosion resistance and interfacial contact resistance (ICR) are investigated systematically. A superior ICR in the range of 2.6-2.9 mΩ-cm2 at a compaction force of 150 N/cm2 is achieved and it is even better than that of graphite. The deposited film possesses high chemical inertness thereby significantly enhancing the corrosion resistance of the coated SS316L. A thickness of 800 nm is sufficient to protect against corrosion. C/CrN multilayer coatings are beneficial in that it can lead to a faster PVD deposition process and lower material cost, while permitting a superior performance in terms of surface conductivity and corrosion resistance. © 2012 Elsevier B.V. All rights reserved. Source

TEER COATINGS Ltd | Date: 2013-02-25

The invention relates to an article, such as a plate for a use in a fuel cell, which has a base onto which a coating is applied which is electrically conductive and which includes a substantially carbon material layer and at least one intermediate layer which can be a nitride, carbide, metal and metal alloy. The multilayer coating which is formed allows the protection of the article in an efficient and effective manner.

TEER COATINGS Ltd | Date: 2013-02-20

The invention relates to a method of applying a coating to an article and an article with said coating. The coating is provided with at least one layer which has a surface area which is greater than the apparent or projected area of the said layer of the coating. This high surface area coating is applied in relatively high gas pressures and in one embodiment can be applied using a magnetron sputter ion plating system.

Cranfield University and TEER COATINGS Ltd | Date: 2010-01-28

A coating and a method of forming the same on a substrate is provided. The coating is provided with at least one ceramic material layer and at least one metal material layer. At least one of the materials used is a shape memory alloy so as to provide elasticity in the coating so as to allow any deformation of the same to be substantially recovered.

Yang S.,Teer Coatings Ltd. | Li X.,University of Birmingham | Cooke K.E.,Teer Coatings Ltd. | Teer D.G.,Teer Coatings Ltd.
Applied Surface Science

TiMoN nano-multilayer hard coatings have been deposited using the closed field unbalanced magnetron sputter ion plating (CFUBMSIP) technique. In one set of experiments, standard DC power supplies were used on four magnetrons in the CFUBMSIP system (4DC magnetrons). The second set of experiments was also in the same magnetic field configuration of CFUBMSIP, but three magnetrons were as again powered with standard DC whilst one magnetron with Ti target was supplied by a high power impulse magnetron sputtering (HIPIMS) power generator (3DC + 1HIPIMS magnetrons). Two elemental titanium sputtering targets and two of molybdenum were used to produce the TiMoN nano-multilayer coatings. Analysis of the coatings was carried out to investigate the differences in terms of properties, compositions and microstructures of the coatings deposited by these two sets of experiments. It was found that the coatings deposited by both sets of the experiments exhibited similar properties of high hardness, good adhesion and exceptional wear resistance, with a lower sliding friction than more commonly used hard coatings including TiN, CrN, TiAlN, CrTiAlN etc. Although the initial TiN coating as formed at the coating-substrate interface using the process of 3DC + 1HIPIMS magnetrons appeared to show a less oriented microstructure in comparison with that of the coating produced by the process using 4DC magnetrons, the compositions and cross sectional microstructures of the bulk of the coatings did not show significant differences, as observed by the cross sectional Transmission Electron Microscopy microstructures of these two types of TiMoN coatings. © 2011 Elsevier B.V. All rights reserved. Source

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