Nitriding of titanium by hollow cathode assisted active screen plasma and its electro-tribological properties

Domínguez-Meister, Santiago; Ibáñez, Iñigo; Dianova, Anastasia; Brizuela, Marta; Braceras, I.

doi:10.1016/j.surfcoat.2021.126998

Cited by 12 publications

(5 citation statements)

References 26 publications

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“…Experiment results showed that hollow cathode assisted active screen plasma nitriding of titanium can produce titanium nitride surfaces with thicknesses far exceeding those typical in PVD coatings. Moreover, higher plasma processing intensities can generate same layer thicknesses at lower temperatures, minimizing the deleterious effect on grain size growth [554].…”

Section: Nitriding Carburizing and Other Additive Surface Engineering...mentioning

confidence: 99%

A review of advances in tribology in 2020–2021

Meng

et al. 2022

Friction

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Around 1,000 peer-reviewed papers were selected from 3,450 articles published during 2020–2021, and reviewed as the representative advances in tribology research worldwide. The survey highlights the development in lubrication, wear and surface engineering, biotribology, high temperature tribology, and computational tribology, providing a show window of the achievements of recent fundamental and application researches in the field of tribology.

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Section: Nitriding Carburizing and Other Additive Surface Engineering...mentioning

confidence: 99%

A review of advances in tribology in 2020–2021

Meng

et al. 2022

Friction

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“…It can be considered that the ASPN process still belongs to a linear abnormal glow discharge. If the nitriding treatment adopts hollow cathode discharge, the ionization rate and plasma density generated will be greater than the linear abnormal glow discharge [36,37]. Our previous work concluded that the HCPSN nitrided sample had a higher corrosion resistance in comparison with the bare AISI 4140 steel and the CPN samples [38].…”

Section: Introductionmentioning

confidence: 96%

Corrosion Behavior of Nitrided Layer of Ti6Al4V Titanium Alloy by Hollow Cathodic Plasma Source Nitriding

et al. 2023

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Ti6Al4V titanium alloys, with high specific strength and good biological compatibility with the human body, are ideal materials for medical surgical implants. However, Ti6Al4V titanium alloys are prone to corrosion in the human environment, which affects the service life of implants and harms human health. In this work, hollow cathode plasm source nitriding (HCPSN) was used to generate nitrided layers on the surfaces of Ti6Al4V titanium alloys to improve their corrosion resistance. Ti6Al4V titanium alloys were nitrided in NH3 at 510 °C for 0, 1, 2, and 4 h. The microstructure and phase composition of the Ti-N nitriding layer was characterized by high-resolution transmission electron microscopy, atomic force microscopy, scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. This modified layer was identified to be composed of TiN, Ti2N, and α-Ti (N) phase. To study the corrosion properties of different phases, the nitriding 4 h samples were mechanically ground and polished to obtain the various surfaces of Ti2N and α-Ti (N) phases. The potentiodynamic polarization and electrochemical impedance measurements were conducted in Hank’s solution to characterize the corrosion resistance of Ti-N nitriding layers in the human environment. The relationship between corrosion resistance and the microstructure of the Ti-N nitriding layer was discussed. The new Ti-N nitriding layer that can improve corrosion resistance provides a broader prospect for applying Ti6Al4V titanium alloy in the medical field.

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“…This effect is particularly advantageous for the nitriding of titanium alloys, which require high diffusion temperatures. The use of high-density plasma allows higher and more controlled processing temperatures to be achieved in a shorter period [23]. In the nitriding furnace, a hollow cathode device is employed to generate a hollow cathode discharge, serving as a powerful working medium and an effective heat source for heating the workpiece [24].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Corrosion Behavior of Ti-N-O Modified Layer on the TC4 Titanium Alloy Prepared by Hollow Cathodic Plasma Source Oxynitriding

Yan

Shao

Zhou

et al. 2023

Metals

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TC4 alloy is widely used in dental implantation due to its excellent biocompatibility and low density. However, it is necessary to further improve the corrosion resistance and surface hardness of the titanium alloy to prevent surface damage that could result in the release of metal ions into the oral cavity, potentially affecting oral health. In this study, Ti-N-O layers were fabricated on the surface of TC4 alloy using a two-step hollow cathode plasma source oxynitriding technique. This resulted in the formation of TiN, Ti2N, TiO2, and nitrogen-stabilized α(N)-Ti phases on the TC4 alloy, forming a Ti-N-O modified layer. The microhardness of the samples treated with plasma oxynitriding (PNO) was found to be 300–400% higher than that of untreated (UN) samples. The experimental conditions were set at 520 °C, and the corrosion current density of the PNO sample was measured to be 7.65 × 10−8 A/cm2, which is two orders of magnitude lower than that of the UN sample. This indicates that the PNO-treated TC4 alloy exhibited significantly improved corrosion resistance in the artificial saliva solutions.

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Nitriding of titanium by hollow cathode assisted active screen plasma and its electro-tribological properties

Cited by 12 publications

References 26 publications

A review of advances in tribology in 2020–2021

A review of advances in tribology in 2020–2021

Corrosion Behavior of Nitrided Layer of Ti6Al4V Titanium Alloy by Hollow Cathodic Plasma Source Nitriding

Electrochemical Corrosion Behavior of Ti-N-O Modified Layer on the TC4 Titanium Alloy Prepared by Hollow Cathodic Plasma Source Oxynitriding

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