Enhanced wear resistance of molybdenum nitride coatings deposited by high power impulse magnetron sputtering by using micropatterned surfaces

Kommer, M.; Sube, T.; Richter, A.; Fenker, M.; Schulz, Wolfgang; Hader, B.; Albrecht, J.

doi:10.1016/j.surfcoat.2017.10.071

Cited by 32 publications

(31 citation statements)

References 54 publications

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“…The latter surface has been prepared using a stamp with prominent microdiamonds partially embedded in a nickel matrix on top of a tungsten carbide base material that is pressed onto the steel surface. The diameter of the diamonds is 25 μm leading to an according size of individual imprints [35,36].…”

Section: Resultsmentioning

confidence: 99%

Enhanced performance of microbial electrolysis cells using microstructured electrodes

Keil

Windisch

Joukov

et al. 2021

Materialwissenschaft Werkst

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A microbial electrolysis cell is set up with the purpose to realize an efficient powerto-gas process. Both hydrogen production by electrolysis and biomethanization proceed in the same reactor cell. In particular, the formation of hydrogen bubbles is strongly governed by the surface properties of the used stainless steel electrodes. Here, we introduce surface topography modifications on the micron-scale to enhance the electrical transport in the cell and support charge conversion into hydrogen. Furthermore, it is analyzed if hydrogen bubble detachment can be supported to form smaller bubbles that can be efficiently converted into methane. A positive influence on the electrical transport is found and explained by a surfacecontrolled suppression of bio-film passivation.

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Section: Resultsmentioning

confidence: 99%

Enhanced performance of microbial electrolysis cells using microstructured electrodes

Keil

Windisch

Joukov

et al. 2021

Materialwissenschaft Werkst

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“…Typical processes that are used for machinery components and/or tools are plasma nitriding [10,11], electroplating and vacuum deposition of transition metal nitrides or carbides. Transition metal compounds such as CrN [12], TiAlN [13], MoN [14,15] and WC [16,17] exhibit outstanding resistances against wear. However, stoichiometric and adhesive coatings often require complex vacuum deposition techniques, which are associated with long deposition times and relatively small thicknesses of typically less than 10 microns.…”

Section: Introductionmentioning

confidence: 99%

Additive Manufacturing of Tungsten Carbide Surfaces with Extreme Wear Resistivity

et al. 2021

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Steel surfaces have been coated with Co-based tungsten carbide (WC) in an additive printing process. This process leads to compact and extremely mechanically stable surfaces. We performed tribological measurements using WC counter bodies under dry conditions and severe mechanical load. Low coefficients of friction, even for rough surfaces, were found and the resulting wear rates were extraordinarily small, even when compared to high-quality PVD film with a similar composition. These findings suggest a wide field of application for this novel preparation process for wear-resistive surfaces.

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“…Recently, a growing interest on molybdenum nitride (MoN) is apparent because of its very high hardness and, in particular, its resistance against high temperatures above 250 °C [1][2][3]. Since the formation of stoichiometric phases in the molybdenum-nitrogen system require a deposition process far from thermal equilibrium typically high power impulse magnetron sputtering (HiPIMS) [4], arc plasma-assisted deposition [5] or pulsed laser deposition (PLD) [6] are used for the coating process.…”

Section: Introductionmentioning

confidence: 99%

“…al found that the combination of prior structuring of the surface with subsequent deposition of a hard material layer additionally reduces wear. In addition, accumulating material inside the microimprints during wear tests has been identified to be originated by the steel counter body [4] In this work we consider anisotropic, line-like surface structures that created by laser structuring in steel surfaces before coating with molybdenum nitride. Similar surface modifications have been considered by Rosenkranz et al for the investigation of steel/steel contacts [11].…”

Section: Introductionmentioning

confidence: 99%

Controlling friction and wear with anisotropic microstructures in MoN coated surfaces

Schulz

Köhn

Kolb

et al. 2021

Preprint

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Steel surfaces have been patterned by laser surface texturing (LST) to create anisotropic microstructures with typical dimensions of a few 10 micrometers. The subsequent deposition of thin molybdenum nitride coatings by high power impulse magnetron sputtering (HiPIMS) leads to surfaces that conserve the surface microstructures and exhibit an extraordinarily large resistance against mechanical wear. Tribological experiments with steel counter bodies show a substantial influence of the relative orientation of structures and wear track on friction and wear. It is pointed out that the main effect is the removal of abrasion particles from the mechanical contact. Analogue experiments with alumina counter bodies that hardly provide wear particles show that the orientation effect is absent.

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Enhanced wear resistance of molybdenum nitride coatings deposited by high power impulse magnetron sputtering by using micropatterned surfaces

Cited by 32 publications

References 54 publications

Enhanced performance of microbial electrolysis cells using microstructured electrodes

Enhanced performance of microbial electrolysis cells using microstructured electrodes

Additive Manufacturing of Tungsten Carbide Surfaces with Extreme Wear Resistivity

Controlling friction and wear with anisotropic microstructures in MoN coated surfaces

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