Surface characteristics for the Ti Al N coatings deposited by high power impulse magnetron sputtering technique at the different bias voltages

Elmkhah, Hassan; Zhang, T.F.; Abdollah-zadeh, A.; Kim, K.H.; Mahboubi, F.

doi:10.1016/j.jallcom.2016.07.013

Cited by 61 publications

(20 citation statements)

References 30 publications

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“…During further increase of the substrate bias, Cr2N (111) becomes the dominant reflection. Changes of bias voltages may also cause reflection shifting in the XRD spectra, and such a peak shift to lower 2θ values was observed for Cr2N (110) with increasing bias voltage, related to the chemical composition change [24,42]. After hydrogenation, the intensities of the peaks of CrN and Cr2N phases changed.…”

Section: Crystalline Structurementioning

confidence: 99%

“…Furthermore, phase composition plays an important role, because the Cr2N phase exhibits better mechanical properties (hardness and elastic modulus) due to higher covalent bonding character in Cr2N than the CrN phase [32,47]. Hardness evolution can be attributed to grain size, texture components, and the residual stress as well [42]. The low hardness of the deposited coatings could be attributed to (1) chromium phase precipitation at the grain boundaries of CrN and Cr2N phases causing increased grain boundary sliding, and (2) enhanced dislocation movement in the coating.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

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Hydrogen Permeation, and Mechanical and Tribological Behavior, of CrNx Coatings Deposited at Various Bias Voltages on IN718 by Direct Current Reactive Sputtering

et al. 2018

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In the current work, the microstructure, hydrogen permeability, and properties of chromium nitride (CrN x ) thin films deposited on the Inconel 718 superalloy using direct current reactive sputtering are investigated. The influence of the substrate bias voltage on the crystal structure, mechanical, and tribological properties before and after hydrogen exposure was studied. It was found that increasing the substrate bias voltage leads to densification of the coating. X-ray diffraction (XRD) results reveal a change from mixed fcc-CrN + hcp-Cr 2 N to the approximately stoichiometric hcp-Cr 2 N phase with increasing substrate bias confirmed by wavelength-dispersive X-ray spectroscopy (WDS). The texture coefficients of (113), (110), and (111) planes vary significantly with increasing substrate bias voltage. The hydrogen permeability was measured by gas-phase hydrogenation. The CrN coating deposited at 60 V with mixed c-CrN and (113) textured hcp-Cr 2 N phases exhibits the lowest hydrogen absorption at 873 K. It is suggested that the crystal orientation is only one parameter influencing the permeation resistance of the CrN x coating together with the film structure, the presence of mixing phases, and the packing density of the structure. After hydrogenation, the hardness increased for all coatings, which could be related to the formation of a Cr 2 O 3 oxide film on the surface, as well as the defect formation after hydrogen loading. Tribological tests reveal that hydrogenation leads to a decrease of the friction coefficient by up to 40%. The lowest value of 0.25 ± 0.02 was reached for the CrN x coating deposited at 60 V after hydrogenation.

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Section: Crystalline Structurementioning

confidence: 99%

Section: Mechanical Propertiesmentioning

confidence: 99%

Hydrogen Permeation, and Mechanical and Tribological Behavior, of CrNx Coatings Deposited at Various Bias Voltages on IN718 by Direct Current Reactive Sputtering

et al. 2018

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“…Six series of Cr-Cu-N coatings with various Cu content were deposited by hybrid coating system combining a radio frequency (RF) and a pulsed DC (PDC) sputtering, which was schematically shown in previous reports [ 19 ]. The Cr target and Cu target were connected with PDC and RF power sources, respectively.…”

Section: Experiments Detailsmentioning

confidence: 99%

Influence of Cu Content on the Microstructure and Mechanical Properties of Cr-Cu-N Coatings

et al. 2018

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The Cr-Cu-N coatings with various Cu contents (0–25.18 (±0.17) at.%) were deposited on Si wafer and stainless steel (SUS 304) substrates in reactive Ar+N2 gas mixture by a hybrid coating system combining pulsed DC and RF magnetron sputtering techniques. The influence of Cu content on the coating composition, microstructure, and mechanical properties was investigated. The microstructure of the coatings was significantly altered by the introduction of Cu. The deposited coatings exhibit solid solution structure with different compositions in all of the samples. Addition of Cu is intensively favored for preferred orientation growth along (200) direction by restricting in (111) direction. With increasing Cu content, the surface and cross-sectional morphology of coatings were changed from triangle cone-shaped, columnar feature to broccoli-like and compact glassy microstructure, respectively. The mechanical properties including the residual stress, nanohardness, and toughness of the coatings were explored on the basis of Cu content. The highest hardness was obtained at the Cu content of 1.49 (±0.10) at.%.

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“…This improvement is mainly caused by the Hall-Petch effect [11][12][13]. Other studies explain hardness decrease (or increase) as a combination of microstructural characteristics such as grain size effect, texture and residual stresses related to the coating deposition parameters [14].…”

Section: Introductionmentioning

confidence: 99%

Effect of thermal treatments in high purity Ar on the oxidation and tribological behavior of arc-PVD c-Al0.66Ti0.33N coatings

Mondragón-Rodríguez

Godoy

Camacho

et al. 2019

Surface and Coatings Technology

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Surface characteristics for the Ti Al N coatings deposited by high power impulse magnetron sputtering technique at the different bias voltages

Cited by 61 publications

References 30 publications

Hydrogen Permeation, and Mechanical and Tribological Behavior, of CrNx Coatings Deposited at Various Bias Voltages on IN718 by Direct Current Reactive Sputtering

Hydrogen Permeation, and Mechanical and Tribological Behavior, of CrNx Coatings Deposited at Various Bias Voltages on IN718 by Direct Current Reactive Sputtering

Influence of Cu Content on the Microstructure and Mechanical Properties of Cr-Cu-N Coatings

Effect of thermal treatments in high purity Ar on the oxidation and tribological behavior of arc-PVD c-Al0.66Ti0.33N coatings

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