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Titanium nitride coatings synthesized by IPD method with eliminated current oscillations

Chodun R., Nowakowska-Langier K., Zdunek K.

Materials Science Poland

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2016

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Vol. 34, No. 3

523--528

EN

This paper presents the effects of elimination of current oscillations within the coaxial plasma accelerator during IPD deposition process on the morphology, phase structure and properties of synthesized TiN coatings. Current observations of waveforms have been made by use of an oscilloscope. As a test material for experiments, titanium nitride TiN coatings synthesized on silicon and high-speed steel substrates were used. The coatings morphology, phase composition and wear resistance properties were determined. The character of current waveforms in the plasma accelerator electric circuit plays a crucial role during the coatings synthesis process. Elimination of the current oscillations leads to obtaining an ultrafine grained structure of titanium nitride coatings and to disappearance of the tendency to structure columnarization. The coatings obtained during processes of a non-oscillating character are distinguished by better wear-resistance properties.

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Investigations of nanocrystalline and gradient coatings produced by cathodic arc evaporation technology

Lukaszkowicz K.

Journal of Achievements in Materials and Manufacturing Engineering

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2012

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Vol. 52, nr 2

75--82

EN

Purpose: The main aim of the this research was the investigation of the microstructure, corrosion resistance and the mechanical properties of the nanocrystalline TiAlSiN, CrAlSiN, AlTiCrN and the gradient TiAlN, TiCN, AlSiCrN coatings deposited by cathodic arc evaporation technology onto the X40CrMoV5-1 hot work tool steel substrate. Design/methodology/approach: The surfaces’ topography and the microstructure of the investigated coatings were observed on the scanning electron microscopy. Diffraction and thin film structure were tested with the use of the transmission electron microscopy. The microhardness tests were made on the dynamic ultra-microhardness tester. Tests of the coatings’ adhesion to the substrate material were made using the scratch test. Findings: It was found that the microstructure of the nanocrystalline coatings consisted of fine crystallites, while their average size fitted within the range of 11-25 nm, depending on the coating type. The critical load LC2 lies within the range of 46-54 N. In case of the gradient coatings it was found that the microstructure consisted of crystallites while their average size fitted within the range of 25-50 nm, depending on the coating type. The coatings demonstrated columnar structure as well as good adhesion to the substrate. The critical load LC2 lies within the range 46-59 N. The coatings demonstrate a high hardness (40 GPa) and corrosion resistance. Practical implications: In order to evaluate with more detail the possibility of applying these surface layers in tools, further investigations should be concentrated on the determination of the thermal fatigue resistance of the coatings. The very good mechanical properties of the nanocrystalline and gradient coatings make them suitable in industrial applications. Originality/value: The investigation results will provide useful information to applying the nanocrystalline and gradient coatings for the improvement of mechanical properties of the hot work tool steels.

3

Własności mechaniczne i odporność korozyjna nanokrystalicznych powłok wytworzonych metodą katodowego odparowania łukowego

Lukaszkowicz K.

Aparatura Badawcza i Dydaktyczna

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2011

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T. 16, nr 3

103-108

PL

W pracy przedstawiono wyniki badań struktury, własności mechanicznych oraz odporności korozyjnej nanokrystalicznych powłok naniesionych metodą katodowego odparowania łukowego. Badania wykonano na powłokach CrAlSiN, CrAlSiN+DLC, CrN. Stwierdzono, że struktura badanych powłok złożona jest z drobnych krystalitów, a ich średnia wielkość wynosi 7-13 nm, w zależności od rodzaju powłoki. Powłoki wykazują wysoką twardość (40 GPa) oraz odporność korozyjną, jak również dobrą przyczepność do podłoża. Obciążenie krytyczne LC2 zawiera się w przedziale 52-55 N, w zależności od rodzaju powłoki.

EN

This work presents the research results on the structure, mechanical properties and corrosion resistance of the nanocrystalline coatings produced by cathodic arc evaporation method. The test were carried out on CrAlSiN, CrAlSiN+DLC and CrN coatings. It was found that tested coatings have nanostructural character with fine crystallites, while their average size fitted within the range 7-13 nm. The coatings demonstrate a high hardness (40 GPa) and corrosion resistance as well as good adhesion to the substrate. The critical load LC2 lies within the range 52-55 N, depending on the coating type.