2007
DOI: 10.1016/j.scriptamat.2007.05.017
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Gaseous nitriding of iron with a nanostructured surface layer

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Cited by 103 publications
(56 citation statements)
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“…Different processes, based on diffusion of liquid [2] or gaseous states [3], have already proved their effectiveness. Physical vapor deposition can also be used for improving surface properties [4][5][6], but their application was often limited owing to poor adhesion of the coating [7].…”
Section: Introductionmentioning
confidence: 99%
“…Different processes, based on diffusion of liquid [2] or gaseous states [3], have already proved their effectiveness. Physical vapor deposition can also be used for improving surface properties [4][5][6], but their application was often limited owing to poor adhesion of the coating [7].…”
Section: Introductionmentioning
confidence: 99%
“…% specimens via SMAT performed in an apparatus in which steel balls (8 mm in diameter) vibrated by a generator with a frequency of 3 kHz repeatedly stroke the sample surface, greatly enhances the nitriding kinetics and reduces the activation energy for the diffusion of nitrogen significantly. It has been found that the nitriding temperature of iron processed by SMAT can be reduced to 300 °C, which is at least 200 °C below the conventional nitriding temperature [93]. In another experiment stainless steel balls (with a mirror like surface and a diameter of 8 mm) struck an iron sample with a purity of 99.95 wt.% at the bottom of a cylinder-shaped vacuum chamber attached to a vibration generator (50 Hz) within 60 min, the grains in the surface layer were effectively refined into the nanometer scale.…”
Section: Chemical Reaction Kineticsmentioning
confidence: 99%
“…The process of microstructure refinement also has proved to lead to an enhancement of the wear, friction and scratch resistance [44,73,88,[93][94][95]. The coefficients of friction and penetration curves for iron SMAT treated samples (stainless steel shots with a diameter of 8 and the vibration generator of 50 Hz within duration of 60 min) were measured in an experiment.…”
Section: Wear Coefficients Of Friction and Scratch Resistancementioning
confidence: 99%
“…The compound layer especially improves the tribological properties of a material due to its high hardness; 4,8) however, in some cases, it also reduces the fatigue strength of the material 2,5,9) due to its brittleness and the presence of cracks and pores. Therefore, the compound layer is removed by grinding and blasting processes to prevent the nitrided products from decreasing the fatigue strength, although it exhibits high wear resistance.…”
Section: Introductionmentioning
confidence: 99%
“…47,1721) For example, Wroblewski and Skalski, 17) and Tong et al 4,18) reported that the nitrogen diffusion behavior was significantly enhanced for fine grained pure iron after shot peening. The FPP treatment highlighted in this study can create finer crystal grains within a short time 2224) because the particle velocity obtained with FPP is higher than that with conventional shot peening.…”
Section: Introductionmentioning
confidence: 99%