Enhanced thermal stability of solar selective absorber based on nano-multilayered TiAlON films deposited by cathodic arc evaporation

Abstract The aim of the research was to investigate the influence of nitriding of the substrate made of 42CrMo4 steel on thermal stability of the antiwear CrCN coating deposited on its surface using Cathodic Arc Evaporation method. Samples of non-nitrided and nitrided substrate/CrCN coating systems were tested with Modulated Temperature Thermodilatometry, which program included system annealing in 26 h, temperature of 290°C and argon atmosphere. Recorded during tests, changes in substrate elongation in response for changes of sample temperature, enabled qualitative determination of changes in stress states in the coatings as a result of samples annealing. Annealing of the system with nitrided substrate resulted in smaller change in residual stress in coating than for the system with non-nitrided substrate, which can indicate its better thermal stability. Values of residual stresses in coatings calculated by sin2ψ method before and after annealing on the basis of tests performed using X-Ray diffraction, agree with results of dilatometric tests.

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Thermal stability and mechanical properties of amorphous coatings in the Ti-B-Si-Al-N system grown by cathodic arc evaporation from TiB2, Ti33Al67, and Ti85Si15 cathodes

Journal of Vacuum Science & Technology A Vacuum Surfaces and Films ◽

10.1116/1.4897170 ◽

2014 ◽

Vol 32 (6) ◽

pp. 061508 ◽

Cited By ~ 8

Author(s):

Hanna Fager ◽

Jon M. Andersson ◽

Jens Jensen ◽

Jun Lu ◽

Lars Hultman

Keyword(s):

Mechanical Properties ◽

Thermal Stability ◽

Cathodic Arc Evaporation ◽

Arc Evaporation ◽

Cathodic Arc ◽

Amorphous Coatings

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Thermal stability of Cr1−xAlxSiyN coatings with medium and high aluminium content prepared by arc evaporation

MRS Proceedings ◽

10.1557/proc-0890-y08-18 ◽

2005 ◽

Vol 890 ◽

Cited By ~ 3

Author(s):

Pavla Karvankova ◽

Ayat Karimi ◽

Olivier Coddet ◽

Tibor Cselle ◽

Marcus Morstein

Keyword(s):

Thermal Stability ◽

Aluminium Content ◽

Two Phase ◽

Al Content ◽

Annealing Step ◽

Industrial Unit ◽

Cathodic Arc Evaporation ◽

Si Content ◽

Arc Evaporation ◽

Thermal Stability Of

ABSTRACTThe thermal stability of Cr1−xAlxN and Cr1−xAlxSiyN nanocomposite coatings with different composition x, Si content, and phase structure has been investigated. The coatings were deposited in an industrial unit by the cathodic arc evaporation method, using rotating cylindrical cathodes. Further sets of coated WC/Co plates were subjected to an annealing step in a forming gas (92% N2 / 8% H2) atmosphere for several hours at a constant temperature (maximum 1000°C). Chemical composition, microstructure and mechanical properties of the coatings were investigated by the RBS, XRD, TEM, SEM, XPS and nanoindentation techniques.As-deposited Cr1−xAlxSiyN coatings with Al contents x in the range of 0.4 ≤ x ≤ 0.6 showed a single-phase cubic CrAlN structure and a maximum hardness of 38 GPa. With increasing the Al content to x = 0.95 – 0.96, two-phase films consisting of hexagonal AlN and cubic CrAlN structure with hardness of about 31 GPa were obtained. The hardness of Cr1−xAlxSiyN coatings increases during annealing at temperatures in the range of 800 – 1000°C by about 1 – 4 GPa, even though the residual compressive stress in the coatings was found to relax considerably during this procedure. The addition of Si into Cr1−xAlxN delays the appearance of hcp-AlN and thereby improves the thermal stability of the coatings.

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