Plasma-assisted boriding of industrial components in a pulsed d.c. glow discharge

Cabeo, E. Rodrı́guez; Laudien, G.; Biemer, S.; Rie, K.‐T.; Hoppe, Steffen

doi:10.1016/s0257-8972(99)00116-4

Cited by 47 publications

(14 citation statements)

References 4 publications

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“…When compared to the conventional thermo-chemical boriding processes, plasma-assisted boriding has many advantages: shorter duration of process, lower temperature of process, relatively low gas consumption, lower activation energy for the formation of the boride layers, and reduction in emission of pollutants and toxic wastes [ 1 , 2 ]. Plasma-assisted boriding has become an interesting technique for producing the borided layers on various materials such as: steels [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ], titanium alloys [ 8 , 9 , 10 , 11 , 12 , 13 ], nickel alloys [ 14 , 15 ], molybdenum alloys [ 16 ] and cobalt alloys [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Growth Kinetics and Some Mechanical Properties of Plasma Paste Borided Layers Produced on Nimonic 80A-Alloy

et al. 2021

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Plasma paste boriding was employed in order to produce the boride layers on Nimonic 80A-alloy. The process was carried out at temperatures of 1023 K, 1073 K and 1123 K for 3, 4 and 6 h in a gas mixture of 50% H2-50% Ar. Borax paste was used as a boron source. The microstructure of the produced surface layers consisted of the mixture of nickel borides and chromium borides. The effect of processing temperature and duration on the thickness of the borided layers was observed. The theoretical thicknesses of the borided layers were estimated using an integral diffusion model. A good correlation was obtained between the theoretical (modeled) and experimental depths of the plasma paste borided layers. The boride layers were characterized by a high hardness ranging from 1160 HV to 2132 HV. The multiphase character of the produced layers resulted in differences in hardness. A significant improvement of the wear resistance of the plasma paste borided Nimonic 80A-alloy was observed in comparison with the non-borided alloy.

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Section: Introductionmentioning

confidence: 99%

Growth Kinetics and Some Mechanical Properties of Plasma Paste Borided Layers Produced on Nimonic 80A-Alloy

et al. 2021

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“…Different boriding methods are dedicated to improve the wear resistance of nickel alloys: powder boriding with the usage of agents without SiC [1][2][3][4], gas boriding in a N 2 -H 2 -BCl 3 atmosphere [5][6][7][8][9][10], electrochemical boriding in molten borax [11] or paste boriding in Ekabor paste [12]. In recent years, the plasma boriding technique was applied to the treatment of steels [13][14][15] and titanium alloys [16,17]. The production of borided layers on nickel alloys is also possible with the use of the plasma boriding method [18].…”

Section: Introductionmentioning

confidence: 99%

The Importance of Phase Composition for Corrosion Resistance of Borided Layers Produced on Nickel Alloys

Makuch

2020

Materials

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The plasma paste boriding process was used for production of the borided layers on pure nickel and nickel-chromium alloys. The produced layers consisted of nickel borides only (in the case of nickel) or a nickel and chromium borides mixture (in the case Ni–Cr alloys). The objective of this investigation was to indicate the importance of the presence of chromium for corrosion resistance of non-borided alloys, as well as to indicate the influence of phase composition of borided layers on their corrosion resistance. Pure nickel was characterized by higher corrosion resistance, in comparison to the nickel-based alloys. Increased chromium content in nickel alloys resulted in their high susceptibility for pitting corrosion. All borided samples were characterized by higher corrosion resistance than the non-borided samples. However, the phase composition of borided layers influenced their corrosion resistance. Due to the microstructure which consisted of one type of borides (nickel borides), borided nickel had the highest resistance to corrosion, whereas the presence of chromium borides in layers produced on nickel-chromium alloys caused a decrease in corrosion resistance.

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“…The increase in treatment temperature causes enlargement of the boride zone providing modified cross‐sectional morphologies. Boride layers are commonly produced at austenite temperatures 13. Therefore, the boride layer (top layer) is formed in regions where the temperature values are more than 600 °C.…”

Section: Resultsmentioning

confidence: 99%

Nanocrystalline Structure Produced by Complex Surface Treatments: Plasma Electrolytic Nitrocarburizing, Boronitriding, Borocarburizing, and Borocarbonitriding

Taheri

Dehghanian

Mahmood

et al. 2007

Plasma Process. Polym.

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In present study, the feasibility of improving tribological performance of low carbon chromium steel by applying complex surface treatments which combines the method of Plasma electrolytic saturation (PES) is investigated. The different regimes of diffusion treatments on the surface affect the mechanical and tribological characteristics of the steel substrates by production of nanocrystalline interlayers. The major advantage of the PES technique was shown to be the extremely high nanocrystalline coating growth rate by the aggressive ionized particles. The combination of characteristics far exceeds the capabilities of the diffusion procedure by means of PES technique. It was found that the different compositions of interlayers produced by means of complex diffusion treatments eliminate the sharp slope of the microhardness profile. The gradual decrease of microhardness with distance from the surface, provides a good tribological performance. The boride layer reveals the highest value of microhardness among the produced interlayers. In the case of tribological performance, the boronitrided sample shows the best characteristics which are related to the formation of nanocrystalline nitride layer beneath the top boride layer.

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Plasma-assisted boriding of industrial components in a pulsed d.c. glow discharge

Cited by 47 publications

References 4 publications

Growth Kinetics and Some Mechanical Properties of Plasma Paste Borided Layers Produced on Nimonic 80A-Alloy

Growth Kinetics and Some Mechanical Properties of Plasma Paste Borided Layers Produced on Nimonic 80A-Alloy

The Importance of Phase Composition for Corrosion Resistance of Borided Layers Produced on Nickel Alloys

Nanocrystalline Structure Produced by Complex Surface Treatments: Plasma Electrolytic Nitrocarburizing, Boronitriding, Borocarburizing, and Borocarbonitriding

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