Characterization of low-pressure high-current cascaded arc plasma in large volumes

Avtaeva, S. V.; Gorokhovsky, V.; Robertson, Scott; Shun’ko, E. V.

doi:10.1016/j.sab.2020.105785

Cited by 2 publications

(2 citation statements)

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“…It can be found that the HEA coating conforms to the high entropy alloy definition the atomic percentage of each element within the range of 5% and 35%. With increasing the nitrogen flow rate, the nitrogen content in the HEA nitride coatings increased rapidly at first and then stabilized due to the high ionization of cathodic arc evaporation [30,31]. A recent study by S. Avtaeva et al [31] had shown that the most probable mechanism of nitrogen dissociation in the low-pressure arc conditions was the excitation transfer between Ar and nitrogen.…”

Section: Microstructure Characterizationmentioning

confidence: 99%

“…With increasing the nitrogen flow rate, the nitrogen content in the HEA nitride coatings increased rapidly at first and then stabilized due to the high ionization of cathodic arc evaporation [30,31]. A recent study by S. Avtaeva et al [31] had shown that the most probable mechanism of nitrogen dissociation in the low-pressure arc conditions was the excitation transfer between Ar and nitrogen. When nitrogen flow rate of 50 sccm was introduced, the nitrogen content of HEAN-N50 increased to 41.27 at.%.…”

Section: Microstructure Characterizationmentioning

confidence: 99%

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Tribological and Mechanical Properties of Multicomponent CrVTiNbZr(N) Coatings

Chang

Chen

2021

Coatings

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Multi-element material coating systems have received much attention for improving the mechanical performance in industry. However, they are still focused on ternary systems and seldom beyond quaternary ones. High entropy alloy (HEA) bulk material and thin films are systems that are each comprised of at least five principal metal elements in equally matched proportions, and some of them are found possessing much higher strength than traditional alloys. In this study, CrVTiNbZr high entropy alloy and nitrogen contained CrVTiNbZr(N) nitride coatings were synthesized using high ionization cathodic-arc deposition. A chromium-vanadium alloy target, a titanium-niobium alloy target and a pure zirconium target were used for the deposition. By controlling the nitrogen content and cathode current, the CrNbTiVZr(N) coating with gradient or multilayered composition control possessed different microstructures and mechanical properties. The effect of the nitrogen content on the chemical composition, microstructure and mechanical properties of the CrVTiNbZr(N) coatings was investigated. Compact columnar microstructure was obtained for the synthesized CrVTiNbZr(N) coatings. The CrVTiNbZrN coating (HEAN-N165), which was deposited with nitrogen flow rate of 165 standard cubic centimeters per minute (sccm), exhibited slightly blurred columnar and multilayered structures containing CrVN, TiNbN and ZrN. The design of multilayered CrVTiNbZrN coatings showed good adhesion strength. Improvement of adhesion strength was obtained with composition-gradient interlayers. The CrVTiNbZrN coating with nitrogen content higher than 50 at.% possessed the highest hardness (25.2 GPa) and the resistance to plastic deformation H3/E*2 (0.2 GPa) value, and therefore the lowest wear rate was obtained because of high abrasion wear resistance.

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Section: Microstructure Characterizationmentioning

confidence: 99%