Duplex treatment of active screen plasma nitriding and amorphous hydrogenated carbon coating

Nishimoto, Akio; Amano, Rei; Tamiya, Takazumi

doi:10.1016/j.apsadv.2021.100129

Cited by 3 publications

(1 citation statement)

References 70 publications

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“…The AS provides heat and reactive species to the workload in a cold wall reactor. The discharge power dissipating at the workload is significantly lower, which results in an improvement of treatment homogeneity [10]. The treatment conditions are controlled by the discharge power and the composition of the feed gas.…”

Section: Introductionmentioning

confidence: 99%

Laser absorption spectroscopy for plasma-assisted thermochemical treatment. Part II.: Impact of the carbon and water contaminants on a low-pressure N₂–H₂ discharge

Pipa¹,

Puth²,

Böcker³

et al. 2023

Plasma Sources Sci. Technol.

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The density evolution of HCN, NH3, H2O and CO molecules over time was monitored by laser absorption spectroscopy (LAS) in a low pressure DC pulsed discharge in N2-H2 gas mixtures with addition of CH4 or O2. The discharge was maintained in an industrial-scale, active screen plasma nitrocarburizing (ASPNC) reactor with a steel active screen (AS). The measured species densities were analysed using a simpliﬁed kinetic model that includes three characteristic times for chemical processes in the ASPNC reactor. The shortest time (1 to 4 min) was associated with the gas residence time in the reactor, the middle one (about 20 min) was assigned to surface reactions on the AS and workload, whereas the largest one (about 3 to 5 hours) was assigned to surface reactions on the cold reactor walls. The work highlights the importance of monitoring the gas composition during plasma nitrocarburizing processes in order to maintain deﬁned treatment conditions and compensate for continuously changing chemical kinetics at the internal reactor surfaces.

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Section: Introductionmentioning

confidence: 99%

Laser absorption spectroscopy for plasma-assisted thermochemical treatment. Part II.: Impact of the carbon and water contaminants on a low-pressure N₂–H₂ discharge

Pipa¹,

Puth²,

Böcker³

et al. 2023

Plasma Sources Sci. Technol.

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show abstract

Adhesion and Chemical Composition of Carbon Coatings Produced in Low-Temperature Rfcvd Processes on Substrates of 35crmnsi5-5-4 Steel with Nanobainitic and Martensitic Structure

Wunsch,

Roguska,

Chodun

et al. 2024

Preprint

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Adhesion and Chemical Composition of Carbon Coatings Produced in Low-Temperature Rfcvd Processes on Substrates of 35crmnsi5-5-4 Steel with Nanobainitic and Martensitic Structure

Wunsch,

Roguska,

Chodun

et al. 2024

Preprint

View full text Add to dashboard Cite

Duplex treatment of active screen plasma nitriding and amorphous hydrogenated carbon coating

Cited by 3 publications

References 70 publications

Laser absorption spectroscopy for plasma-assisted thermochemical treatment. Part II.: Impact of the carbon and water contaminants on a low-pressure N₂–H₂ discharge

Laser absorption spectroscopy for plasma-assisted thermochemical treatment. Part II.: Impact of the carbon and water contaminants on a low-pressure N₂–H₂ discharge

Adhesion and Chemical Composition of Carbon Coatings Produced in Low-Temperature Rfcvd Processes on Substrates of 35crmnsi5-5-4 Steel with Nanobainitic and Martensitic Structure

Adhesion and Chemical Composition of Carbon Coatings Produced in Low-Temperature Rfcvd Processes on Substrates of 35crmnsi5-5-4 Steel with Nanobainitic and Martensitic Structure

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Duplex treatment of active screen plasma nitriding and amorphous hydrogenated carbon coating

Cited by 3 publications

References 70 publications

Laser absorption spectroscopy for plasma-assisted thermochemical treatment. Part II.: Impact of the carbon and water contaminants on a low-pressure N2–H2 discharge

Laser absorption spectroscopy for plasma-assisted thermochemical treatment. Part II.: Impact of the carbon and water contaminants on a low-pressure N2–H2 discharge

Adhesion and Chemical Composition of Carbon Coatings Produced in Low-Temperature Rfcvd Processes on Substrates of 35crmnsi5-5-4 Steel with Nanobainitic and Martensitic Structure

Adhesion and Chemical Composition of Carbon Coatings Produced in Low-Temperature Rfcvd Processes on Substrates of 35crmnsi5-5-4 Steel with Nanobainitic and Martensitic Structure

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Laser absorption spectroscopy for plasma-assisted thermochemical treatment. Part II.: Impact of the carbon and water contaminants on a low-pressure N₂–H₂ discharge

Laser absorption spectroscopy for plasma-assisted thermochemical treatment. Part II.: Impact of the carbon and water contaminants on a low-pressure N₂–H₂ discharge