Investigation of the structure and properties of PVD coatings and ALD + PVD hybrid coatings deposited on sialon tool ceramics

Staszuk, M.; Pakuła, D.; Chladek, Grzegorz; Pawlyta, Mirosława; Pancielejko, M.; Czaja, Paweł

doi:10.1016/j.vacuum.2018.04.032

Cited by 35 publications

(18 citation statements)

References 18 publications

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“…For all three materials with hybrid coatings, the stability of the potential values in the tested environment was found, the value of which increased with increasing PVD coating deposition time from about −150 mV for the material with the coating obtained after 30 min to about −50 mV after 120 min of deposition. The analysis of the results obtained from the Tafel calculations (Table 9) allows us to conclude that the application of hybrid coatings on the steel substrate caused a favorable change in the corrosion resistance of the tested materials, which is evidenced by an increase in the polarization resistance from 0.5 MΩ•cm 2 for the substrate material to 1.2 MΩ•cm 2 for Hybrid 1 sample, 3.9 MΩ•cm 2 for Hybrid 2 sample and 10 times for Hybrid 3 sample. A similar relationship was noted by comparing the corrosion current density results, the lowest value of which was 1.2 nA/cm 2 for the Hybrid 3 sample, decreased when shortening the PVD coating application time to 2.2 nA/cm 2 for the Hybrid 1 sample but was still more than 4× higher than for the 316L steel substrate material.…”

Section: Resultsmentioning

confidence: 98%

Structure and Properties of TiO2/nanoTiO2 Bimodal Coatings Obtained by a Hybrid PVD/ALD Method on 316L Steel Substrate

et al. 2021

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This paper presents the synergy of the effect of two surface engineering technologies—magnetron sputtering (MS-PVD) and atomic layer deposition (ALD) on the structure and properties of 316L steel. Recent studies indicate that PVD coatings, despite their thickness of a few micrometers, have many discontinuities and structural defects, which may lead to pitting corrosion after time. Applying an ALD layer to a PVD coating seals its structure and contributes to extending the service life of the coating. Investigations of the structure and morphology of the produced layers were carried out using a scanning electron microscope (SEM) and atomic force microscope (AFM). In addition, the structure of the coatings was investigated on the cross-section using a scanning-transmission electron microscope S/TEM. The tribological properties of the materials studied were determined by the ball-on-disc method. The corrosion resistance of the tested materials was determined by the electrochemical potentiodynamic method by recording the polarization curves of the anodes. Additional information about the electrochemical properties of the tested samples, including the quality, their tightness, and their resistivity, was obtained by electrochemical impedance spectroscopy (EIS). In addition, the main mechanisms of corrosion and tribological wear were determined by SEM observations after corrosion tests and after tribological tests. The study showed that the fabrication of hybrid layers by MS-PVD and ALD techniques allows obtaining coatings with electrochemical properties superior to those of layers fabricated by only one method.

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Section: Resultsmentioning

confidence: 98%

Structure and Properties of TiO2/nanoTiO2 Bimodal Coatings Obtained by a Hybrid PVD/ALD Method on 316L Steel Substrate

et al. 2021

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“…From Coatings 2021, 11, 963 7 of 16 these images, the surface roughness (RMS) for each coating was obtained, and the values were 11.96, 10.41, 5.593, and 5.591 nm at a bias voltage of 0, −100, −150, and −200 V, respectively. Obviously, the bias voltage had a huge impact on the coatings' RMS; there was no obvious change as the bias voltage increased from 0 to −100 V, while a great decrease in roughness occurred with the bias voltage increasing to −150 V, which was due to the bombardment of high-energy ion strengthening the adatoms' mobility, and they moved or diffused into the grain voids, generating smoother and denser coatings [35]. The surface morphologies of the HfC coatings are presented in Figure 6.…”

Section: Xrd Xps Tem and Afm Analysismentioning

confidence: 99%

The Effects of Substrate Bias on the Properties of HfC Coatings Deposited by RF Magnetron Sputtering

Wang

Ding

et al. 2021

Coatings

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In the paper, by using radio frequency (RF) magnetron sputter technology, the HfC coating grew on a 316L stainless steel substrate in an Ar atmosphere at various substrate bias voltages from 0 to −200 V. From the X-ray diffraction (XRD) and transmission electron microscopy (TEM) experiments, the HfC coatings were well crystallized and (111) preferential growth had been successfully obtained by controlling bias voltage at −200 V. Nanoindentation experimental results for the prepared HfC coatings indicated that they possessed the maximum nanohardness due to the formation of the (111) orientation. The results of electrochemical measurements displayed that 316L stainless steel (316L) coated with the HfC coatings had better corrosion resistance than bare 316L. With the bias voltage increasing to −200 V, adhesion of the 316L substrate with the HfC coating could be greatly improved, as well as corrosion resistance. The antithrombogenicity of the HfC coatings was identified by platelet adhesive and hemolytic ratio assay in vitro. It was shown that the hemocompatibility of coated 316L had been improved greatly compared with bare 316L and the HfC coatings possessed better antithrombogenicity with the bias voltage elevating above −150 V.

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“…Recently, in order to further improve the wear and corrosion resistance of titanium alloys, the surface of titanium alloys has been strengthened. The surface treatment methods used generally include plasma spray, physical vapor deposition (PVD), and electroplating [6][7][8]. However, these methods have a complex process, high cost, and low coating bonding strength.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Properties of In situ Synthesized TiC/Graphene/Ti6Al4V Composite Coating by Laser Cladding

Zhang

Zhao

Bai

et al. 2021

Trans Indian Inst Met

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A graphene (Gr)/Ti6Al4V composite coating was prepared by laser cladding, and the microstructure and the properties were studied. The results showed that an in situ synthesis between Gr and Ti occurred and TiC was formed. The TiC was homogeneously distributed. The a' acicular martensite was formed at the bottom of the coating during the rapid solidification process, and a good metallurgical bond was formed between the coating and substrate. The TiC and the self-lubrication of Gr improved the wear resistance of coating. And the wear mechanism changed from more serious abrasive and adhesive wear to a mild wear with fine scratches. Meanwhile, severe oxidative wear occurred in the coating and substrate under hightemperature friction and wear. The corrosion resistance of the coating was also improved. The corrosion morphology changed from denudation and pitting to local pitting. The Gr and TiC in the coating effectively prevented the corrosion.

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Investigation of the structure and properties of PVD coatings and ALD + PVD hybrid coatings deposited on sialon tool ceramics

Cited by 35 publications

References 18 publications

Structure and Properties of TiO2/nanoTiO2 Bimodal Coatings Obtained by a Hybrid PVD/ALD Method on 316L Steel Substrate

Structure and Properties of TiO2/nanoTiO2 Bimodal Coatings Obtained by a Hybrid PVD/ALD Method on 316L Steel Substrate

The Effects of Substrate Bias on the Properties of HfC Coatings Deposited by RF Magnetron Sputtering

Microstructure and Properties of In situ Synthesized TiC/Graphene/Ti6Al4V Composite Coating by Laser Cladding

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