The enhancement effect of salt bath preoxidation on salt bath nitriding for AISI 1045 steel

Peng, Tiantian; Dai, Mingyang; Cai, Wei; Wei, Wei; Wei, Kun; Hu, Jing

doi:10.1016/j.apsusc.2019.04.134

Cited by 25 publications

(10 citation statements)

References 13 publications

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“…Thus, the chemical potential is responsible for the diffusion of atoms through grain boundaries, sub-limits, and displacements. The formation of a composite layer (white layer) and alloy nitride particles in the diffusion zone are responsible for the improvement of the properties in the samples nitrided by this technique [29][30][31][32][33][34]. This technique is beneficial because of operation simplicity, good quality, and a lower cost for its use [29,35].…”

Section: Conventional Nitriding Techniquesmentioning

confidence: 99%

“…The formation of a composite layer (white layer) and alloy nitride particles in the diffusion zone are responsible for the improvement of the properties in the samples nitrided by this technique [29][30][31][32][33][34]. This technique is beneficial because of operation simplicity, good quality, and a lower cost for its use [29,35]. However, it exhibits certain drawbacks: the control of the salt chemical composition, the environmental problems related to waste disposal, and the disposal of the washing water (due to toxic chemicals) [36].…”

Section: Conventional Nitriding Techniquesmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of TiN and TiO2 thin films by cathodic cage plasma deposition: a brief review

Abreu

Naeem

Borges

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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The cathodic cage plasma deposition (CCPD) is an advanced technique recently developed from an active screen plasma nitriding system, which has been used for thin film deposition such as titanium nitride and titanium dioxide (TiO 2). These coatings can improve the physical, mechanical, and optical properties of numerous materials, and such coatings can be developed by several techniques. Unfortunately, the conventional deposition techniques exhibit certain drawbacks, including high cost, the complexity of the operation, very low pressure, and high processing temperature; as a result, CCPD is an advantageous technique. In this review, brief information on the deposition of titanium nitride and oxide coatings on steel alloys, titanium, glass, and silicon substrates, and the effect of control parameters on deposition efficiency is provided. The effectiveness of this system for the synthesis of thin films on various substrates, including insulators and conductors, is also summarized. The recent developments and applications of CCPD for titanium-based coatings are described in detail.

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Section: Conventional Nitriding Techniquesmentioning

confidence: 99%

Section: Conventional Nitriding Techniquesmentioning

confidence: 99%

Synthesis of TiN and TiO2 thin films by cathodic cage plasma deposition: a brief review

Abreu

Naeem

Borges

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

show abstract

“…Assuming that the salt bath had good fluidity and the nitrogen atoms were uniformly dispersed [33], the concentrations of active N atoms were also 2.98 and 4.56 wt-% in the nitride salts without and with the RE, respectively, at 540°C. These results clearly showed that the concentration of active N atoms in the nitride salt increased after RE addition, which was beneficial for the diffusion of nitrogen atoms into the substrate material.…”

Section: Diffusion Kinetics Calculationsmentioning

confidence: 99%

Acceleration effects of rare earths on salt bath nitriding: diffusion kinetics and first-principles calculations

Zhang

Zhang³

et al. 2020

Surface Engineering

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Nitriding can improve the surface hardness and wear resistance of metals, and rare earths can speed up this process. To study the mechanism of rare earths promoting salt bath nitriding, GX-8 steel was nitrided at different temperatures in two salt baths with and without rare earth Ce. First, structures and depths of the nitrided layers were investigated by microscopic observation, X-ray diffraction, GD-OES and microhardness tests. Then, the diffusion kinetics were calculated, and the atomic mechanisms of rare earth-assisted nitriding were studied by first principles. The kinetics calculations show that after adding Ce to the salt baths, the diffusion activation energy decreases, whereas the decomposition rate of active nitrogen atoms increases. The firstprinciples results indicate that Ce increases the energy and volume of the supercell of Fe-Cr alloy with N interstitial dissolution and reduces the stability of the supercell. These results demonstrate rare earths can accelerate nitriding at the atomic level.

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“…Another strategy is prompting the recrystallization of zeolite on the surface of the membrane to heal the defects. Molten salt method was widely used in the metal-processing field as a surface treatment technology with the advantages of heating evenly and no overheating. , However, the over-high temperature above the melting point of salt threatens the zeolite framework. In this paper, SSZ-13 zeolite membrane was treated in heated NaCl at temperatures varying from 500 to 550 °C to remove TMAdaOH, and the surface of the membrane was modified, too.…”

Section: Introductionmentioning

confidence: 99%

Template Removal and Surface Modification of an SSZ-13 Membrane with Heated Sodium Chloride for CO₂/CH₄ Gas Separation

Wang

Zhu

et al. 2022

ACS Omega

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Hydrothermal synthesis with an organic template of N , N , N trimethyl-1-adamantammonium hydroxide (TMAdaOH) is the most commonly used method to prepare an SSZ-13 zeolite membrane. In this paper, the synthesized membrane was treated in heated sodium chloride to remove TMAdaOH instead of calcination in air. The surface of the membrane was modified by the heated NaCl and resulted in an improved CO 2 /CH 4 gas separation selectivity. TMAda + in the channels of SSZ-13 zeolite decomposed completely, and the treatment time was shortened significantly compared with calcination in air. The recrystallization of zeolite reacting with heated NaCl was the possible reason for the improved gas separation performance of the membrane.

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The enhancement effect of salt bath preoxidation on salt bath nitriding for AISI 1045 steel

Cited by 25 publications

References 13 publications

Synthesis of TiN and TiO2 thin films by cathodic cage plasma deposition: a brief review

Synthesis of TiN and TiO2 thin films by cathodic cage plasma deposition: a brief review

Acceleration effects of rare earths on salt bath nitriding: diffusion kinetics and first-principles calculations

Template Removal and Surface Modification of an SSZ-13 Membrane with Heated Sodium Chloride for CO₂/CH₄ Gas Separation

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The enhancement effect of salt bath preoxidation on salt bath nitriding for AISI 1045 steel

Cited by 25 publications

References 13 publications

Synthesis of TiN and TiO2 thin films by cathodic cage plasma deposition: a brief review

Synthesis of TiN and TiO2 thin films by cathodic cage plasma deposition: a brief review

Acceleration effects of rare earths on salt bath nitriding: diffusion kinetics and first-principles calculations

Template Removal and Surface Modification of an SSZ-13 Membrane with Heated Sodium Chloride for CO2/CH4 Gas Separation

Contact Info

Product

Resources

About

Template Removal and Surface Modification of an SSZ-13 Membrane with Heated Sodium Chloride for CO₂/CH₄ Gas Separation