Analysis of the growth of concomitant nitride layers produced by a post-discharge assisted process

Oseguera, J.; Castillo, Francisco; Gómez, Adriana Gómez; Fraguela, A.

doi:10.1016/j.tsf.2006.07.119

Cited by 5 publications

(3 citation statements)

References 30 publications

(53 reference statements)

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“…This brings some inherent shortcomings such as "edging effect" and damage caused to parts by arcing [8,9]. To overcome the above problems, many nitriding methods have been developed by decoupling plasma generation from the components including post-discharge nitriding [10], plasma immersion ion implantation [11], and active screen plasma nitriding [12].…”

Section: Introductionmentioning

confidence: 99%

Improvement of Wear Resistances of AISI 316L Austenitic Stainless Steels by Anodic Nitriding

Wang

et al. 2012

AMM

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The nitriding of AISI 316L stainless steels has been carried out at anodic potential in a space enclosed by an active screen that consists of two cylinders with different diameter. These two cylinders made up a hollow cathode in a discharge system. Nitriding experiments were carried out on AISI 316L stainless steel at 450°C for times ranging from 1 to 24h in ammonia atmosphere. The intensity of electron bombardment on the surface of sample was low due to the anodic sheath, the disadvantages attached to conventional plasma nitriding were completely avoided. The phase composition, the thickness and the surface topography of the nitrided layer, as well as its hardness, were investigated by X-ray diffraction, scanning electron microscopy and a micro-hardness tester. The surface microhardness values and the thickness of the hardened layers increased as the nitriding time increased. Tribology properties of the untreated and nitrided 316L stainless steel have been investigated using a ball-on-disc tribometer with AISI52100 ball as the counterface. The results showed wear resistance of the AISI 316L stainless steels were greatly increased by anodic nitriding, owing to the strengthening effect of expanded austenite formed in the modified surface layer.

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Section: Introductionmentioning

confidence: 99%

Improvement of Wear Resistances of AISI 316L Austenitic Stainless Steels by Anodic Nitriding

Wang

et al. 2012

AMM

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“…Treatment reactors usually run far away from the discharge, in the Lewis-Rayleigh afterglow (also called nitrogen late afterglow, NLA), characterized by a visible emission in the yellow part of the spectrum, associated with the recombination of the nitrogen atoms in the gas phase. Such low-pressure flowing nitrogen afterglows systems are of particular interest in numerous applications such as nitridation [3][4], material processing [5] or bacteriological decontamination [6][7]. Surface recombination was extensively studied in the past but the methods used were either based on non-local N-atom concentration measurements (NO titration [8][9], mass spectrometry [10], first positive intensity temporal decay [11][12][13]) or based on indirect data such as the electrical temporal behaviour of successive discharges [14][15] or the wall temperature increase due to the heat deposited during heterogeneous recombination [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pressure dependence of the nitrogen atom recombination probability in late afterglows

Rouffet¹,

Sarrette²

2010

J. Phys. D: Appl. Phys.

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Abstract. Atomic nitrogen recombination probabilities (γ N ) are presented for different materials. They were obtained in late afterglow conditions through a comparison between local measurements of the nitrogen atom density with TALIF (Two-photon Absorption Laser Induced Fluorescence) and atomic concentration profiles calculations at the vicinity of substrates. A comparison is also made between a spatially resolved technique (TALIF) and a non-spatially resolved one (based on optical emission spectroscopy) for the measurement of the N-atom concentration. For each of the studied materials, an inverse pressure dependence of γ N was observed, while the obtained data were found to be in good agreement with previously published values, derived from surface temperature measurements.

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Mathematical simulation of the layer growth kinetics during post-discharge nitriding: From early stage to quasi-steady stage

Castillo

Oseguera

Gómez

et al. 2008

Surface and Coatings Technology

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Analysis of the growth of concomitant nitride layers produced by a post-discharge assisted process

Cited by 5 publications

References 30 publications

Improvement of Wear Resistances of AISI 316L Austenitic Stainless Steels by Anodic Nitriding

Improvement of Wear Resistances of AISI 316L Austenitic Stainless Steels by Anodic Nitriding

Pressure dependence of the nitrogen atom recombination probability in late afterglows

Mathematical simulation of the layer growth kinetics during post-discharge nitriding: From early stage to quasi-steady stage

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