The Experts below are selected from a list of 9912 Experts worldwide ranked by ideXlab platform
Wantang Fu - One of the best experts on this subject based on the ideXlab platform.
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significant acceleration of Nitriding kinetics in pure iron by pressurized gas treatment
Materials & Design, 2015Co-Authors: Bo Wang, Wantang Fu, Fan Dong, Weiwei Feng, Zhenhua WangAbstract:Abstract The effect of Nitriding pressure on the formation of nitrides and the Nitriding kinetics in pure iron were investigated by applying pressurized gas Nitriding at 500 °C for 5 h. Increasing the Nitriding pressure from 1 atm (conventional Nitriding condition) to 5 atm significantly increased the nitrided layer thickness from about 210 μm to 1100 μm. Furthermore, it was found that the constituents of the compound layer can be controlled by changing the Nitriding pressure. These improvements are related to the fast reaction rates and high inward diffusive flux of nitrogen during the pressurized gas Nitriding.
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study on pressurized gas Nitriding characteristics for steel 38crmoala
Surface & Coatings Technology, 2015Co-Authors: Bo Wang, Zean Zhou, Wantang FuAbstract:Abstract The effects of Nitriding pressure on the microstructure, surface hardness, thickness and wear resistance of the nitrided layer on 38CrMoAlA steel were investigated. Gas Nitriding was conducted in flowing NH3 gas at 510 °C for 5 h under Nitriding pressures ranging from 1 to 6 atm. The results show that, compared with conventional gas Nitriding (1 atm), the increase in Nitriding pressure markedly accelerated the gas Nitriding kinetic process and promoted the rapid thickening of the nitrided layers. Both the microstructure and the microhardness of the nitrided surface layer were strictly controlled by Nitriding pressure. The nitrided layer of the sample nitrided under 6 atm for 5 h exhibited the best wear resistance, and its thickness (410 μm) was almost equal to that (440 μm) of the conventional gas Nitriding at 510 °C for 50 h, which would result in higher production efficiency and lower cost in industrial application.
Bo Wang - One of the best experts on this subject based on the ideXlab platform.
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significant acceleration of Nitriding kinetics in pure iron by pressurized gas treatment
Materials & Design, 2015Co-Authors: Bo Wang, Wantang Fu, Fan Dong, Weiwei Feng, Zhenhua WangAbstract:Abstract The effect of Nitriding pressure on the formation of nitrides and the Nitriding kinetics in pure iron were investigated by applying pressurized gas Nitriding at 500 °C for 5 h. Increasing the Nitriding pressure from 1 atm (conventional Nitriding condition) to 5 atm significantly increased the nitrided layer thickness from about 210 μm to 1100 μm. Furthermore, it was found that the constituents of the compound layer can be controlled by changing the Nitriding pressure. These improvements are related to the fast reaction rates and high inward diffusive flux of nitrogen during the pressurized gas Nitriding.
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study on pressurized gas Nitriding characteristics for steel 38crmoala
Surface & Coatings Technology, 2015Co-Authors: Bo Wang, Zean Zhou, Wantang FuAbstract:Abstract The effects of Nitriding pressure on the microstructure, surface hardness, thickness and wear resistance of the nitrided layer on 38CrMoAlA steel were investigated. Gas Nitriding was conducted in flowing NH3 gas at 510 °C for 5 h under Nitriding pressures ranging from 1 to 6 atm. The results show that, compared with conventional gas Nitriding (1 atm), the increase in Nitriding pressure markedly accelerated the gas Nitriding kinetic process and promoted the rapid thickening of the nitrided layers. Both the microstructure and the microhardness of the nitrided surface layer were strictly controlled by Nitriding pressure. The nitrided layer of the sample nitrided under 6 atm for 5 h exhibited the best wear resistance, and its thickness (410 μm) was almost equal to that (440 μm) of the conventional gas Nitriding at 510 °C for 50 h, which would result in higher production efficiency and lower cost in industrial application.
Zhenhua Wang - One of the best experts on this subject based on the ideXlab platform.
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significant acceleration of Nitriding kinetics in pure iron by pressurized gas treatment
Materials & Design, 2015Co-Authors: Bo Wang, Wantang Fu, Fan Dong, Weiwei Feng, Zhenhua WangAbstract:Abstract The effect of Nitriding pressure on the formation of nitrides and the Nitriding kinetics in pure iron were investigated by applying pressurized gas Nitriding at 500 °C for 5 h. Increasing the Nitriding pressure from 1 atm (conventional Nitriding condition) to 5 atm significantly increased the nitrided layer thickness from about 210 μm to 1100 μm. Furthermore, it was found that the constituents of the compound layer can be controlled by changing the Nitriding pressure. These improvements are related to the fast reaction rates and high inward diffusive flux of nitrogen during the pressurized gas Nitriding.
Gin-ya Adachi - One of the best experts on this subject based on the ideXlab platform.
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Plasma Nitriding of Sm2Fe17
Journal of Alloys and Compounds, 1993Co-Authors: Ken-ichi Machida, Eiji Yamamoto, Gin-ya AdachiAbstract:Abstract An intermetallic compound Sm 2 Fe 17 N x was synthesized by plasma Nitriding of Sm 2 Fe 17 in a stream of N 2 H 2 mixed gas. The reaction proceeded at a lower temperature (around 423 K) than that of the conventional thermal technique, but not at room temperature. This is discussed on the basis of the difference between the reaction mechanisms of plasma and thermal Nitridings.
H. Michel - One of the best experts on this subject based on the ideXlab platform.
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low temperature Nitriding of aisi 316l stainless steel and titanium in a low pressure arc discharge
Surface & Coatings Technology, 1999Co-Authors: Nathalie Renevier, H. Michel, Peter Collignon, Th CzerwiecAbstract:AISI 316L stainless steel (SS) and titanium Nitriding were studied in a low pressure arc-assisted Nitriding process where the substrate temperature and the plasma parameters are uncoupled. Lower Nitriding temperature limits were explored for constant plasma parameters in Ar–N2 gas mixtures and substrates at floating potential. Nitrogen superficial concentration, layer thicknesses and X-ray diffraction analyses were performed on SS specimens nitrided at two temperatures (580 and 680 K) for different times and titanium Nitriding was studied in the temperature range 750–1025 K. At low temperature, the Nitriding performances are limited by a plasma–surface phenomenon that probably involves recombination of nitrogen atoms.
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Low temperature Nitriding of aluminium in a low pressure arc discharge
1997Co-Authors: Nathalie Renevier, Th Czerwiec, Peter Collignon, H. MichelAbstract:The purpose of this paper is to present results on aluminium Nitriding carried out in a high current, low voltage and low pressure thermionic arc process. In this process, the Nitriding rate of ferrous materials is high even if the workpieces are nitrided at floating potential in Ar-N2 gas mixtures. For aluminium Nitriding, an additional biasing of the substrate is necessary to perform a previous ion cleaning step and to bias the substrates during the Nitriding treatment.
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progress in the analysis of the mechanisms of ion Nitriding
Surface & Coatings Technology, 1995Co-Authors: H. Michel, T Czerwiec, M Gantois, D Ablitzer, A RicardAbstract:Abstract In this paper the mechanisms of ion Nitriding are discussed, particular attention being paid to d.c. diode Nitriding. Recent trends in the analysis of the mechanisms of d.c. diode Nitriding are reviewed, emphasizing the importance of the cathode fall region. Diagnostics of active species and calculation of their densities in the plasma are presented and related to modelling. The hydrogen effect and plasma-solid interaction are also discussed. New developments and alternatives to d.c. diode Nitriding such as triode Nitriding are highlighted.
