The basic remelting and cladding tests with laminar plasma technology on metals have been conducted in order to demonstrate the possibility of the technology applied in material surface modification. The experimental ...The basic remelting and cladding tests with laminar plasma technology on metals have been conducted in order to demonstrate the possibility of the technology applied in material surface modification. The experimental results show that the properties of the modified layers of the cast iron surface can be improved notably by the remelting treatment and those of the stainless steel by the cladding treatment. The related results are also verified by microscopic studies such as scanning electron microscopic (SEM) observations, energy dispersive spectra (EDS) analysis and the Vickers hardness measurements of the surface modified layers.展开更多
Nature gas is not only an increasing important role in energy and chemicals supplies in 21st century but also the second most important of the anthropogenic greenhouse gases. This paper reviewed the plasma technology ...Nature gas is not only an increasing important role in energy and chemicals supplies in 21st century but also the second most important of the anthropogenic greenhouse gases. This paper reviewed the plasma technology application in natural gas chemical engineering, pointed out the problem at present and forecasted plasma concerted catalysis technology will facilitate the nature gas directly conversion into more valuable chemicals supplies economically in short after time.展开更多
TiN/Ti multi-permeating alloying layer has been formed on the low carbon steel by means of the double glow-discharge plasma surface alloying technique and hollow-cathode effect. The alloying layer was detected by axio...TiN/Ti multi-permeating alloying layer has been formed on the low carbon steel by means of the double glow-discharge plasma surface alloying technique and hollow-cathode effect. The alloying layer was detected by axiovert 25 CA optical microscope with computer analyzing software (LEC), GDA-2 glow discharge spectroscopy (GDS), X-ray diffraction (XRD) and galvanochemical method. The results showed that the thickness of TiN/Ti multi-permeating alloying layer was about 10μm, the content of Ti on the surface was up to 63.48 wt% and the content of N was up to 12.46 wt%. The atom Ti and N concentrations changed gradually across the depth of the alloying layer and the preferred orientation of TiN/Ti alloying layer was crystal surface (200). The multi-permeating alloying layer and substrate were combined through metallurgy. The surface appearances of the multi-permeating alloying layer were uniform and of a compact cellular structure. The hardness of the surface was about 1600-3000 HV0.1. The corrosion resistance of the permeating TiN/Ti alloying layer in 0.5 mol/L H2SO4 solution was greatly increased and the corrosion rate was only 0.3082 g/m^2. h.展开更多
This work proposes a new plasma super-phase gradient metasurfaces(PS-PGMs)structure,owing to the limitations of the thin-layer plasma for electromagnetic wave attenuation.Based on the cross-shaped surface unit configu...This work proposes a new plasma super-phase gradient metasurfaces(PS-PGMs)structure,owing to the limitations of the thin-layer plasma for electromagnetic wave attenuation.Based on the cross-shaped surface unit configuration,we have designed the X-band absorbing structure through the dispersion control method.By setting up the Drude dispersion model in the computer simulation technology,the designed phase gradient metasurfaces structure is superposed over the plasma,and the PS-PGMs structure is constructed.The electromagnetic scattering characteristics of the new structure have been simulated,and the reflectance measurement has been carried out to verify the absorbing effect.The results demonstrate that the attenuation effect of the new structure is superior to that of the pure plasma structure,which invokes an improved attenuation effect from the thin layer plasma,thus enhancing the feasibility of applying the plasma stealth technology to the local stealth of the strong scattering part of a combat aircraft.展开更多
Advisory Board (Arranged in alphabetical order),GE Changchun/(葛昌纯), University of Science and Technology Beijing, Beijing 100083, China,HE Xiantu(贺贤士)Institute of Applied Physics and Computational Mathemat...Advisory Board (Arranged in alphabetical order),GE Changchun/(葛昌纯), University of Science and Technology Beijing, Beijing 100083, China,HE Xiantu(贺贤士)Institute of Applied Physics and Computational Mathematics, Beijing 100088, China,HUO Yuping(霍裕平)Zhengzhou University, Zhengzhou 450052, China .展开更多
基金supported by National Natural Science Foundation of China (No. 10275085)
文摘The basic remelting and cladding tests with laminar plasma technology on metals have been conducted in order to demonstrate the possibility of the technology applied in material surface modification. The experimental results show that the properties of the modified layers of the cast iron surface can be improved notably by the remelting treatment and those of the stainless steel by the cladding treatment. The related results are also verified by microscopic studies such as scanning electron microscopic (SEM) observations, energy dispersive spectra (EDS) analysis and the Vickers hardness measurements of the surface modified layers.
基金Supported by the National Natural Science Foundation of China
文摘Nature gas is not only an increasing important role in energy and chemicals supplies in 21st century but also the second most important of the anthropogenic greenhouse gases. This paper reviewed the plasma technology application in natural gas chemical engineering, pointed out the problem at present and forecasted plasma concerted catalysis technology will facilitate the nature gas directly conversion into more valuable chemicals supplies economically in short after time.
基金supported by National Natural Science Foundation of China (No. 50374054)the Natural Science Foundation of Shanxi Province (No. 20031050)
文摘TiN/Ti multi-permeating alloying layer has been formed on the low carbon steel by means of the double glow-discharge plasma surface alloying technique and hollow-cathode effect. The alloying layer was detected by axiovert 25 CA optical microscope with computer analyzing software (LEC), GDA-2 glow discharge spectroscopy (GDS), X-ray diffraction (XRD) and galvanochemical method. The results showed that the thickness of TiN/Ti multi-permeating alloying layer was about 10μm, the content of Ti on the surface was up to 63.48 wt% and the content of N was up to 12.46 wt%. The atom Ti and N concentrations changed gradually across the depth of the alloying layer and the preferred orientation of TiN/Ti alloying layer was crystal surface (200). The multi-permeating alloying layer and substrate were combined through metallurgy. The surface appearances of the multi-permeating alloying layer were uniform and of a compact cellular structure. The hardness of the surface was about 1600-3000 HV0.1. The corrosion resistance of the permeating TiN/Ti alloying layer in 0.5 mol/L H2SO4 solution was greatly increased and the corrosion rate was only 0.3082 g/m^2. h.
基金supported by National Natural Science Foundation of China(No.12075319)in part by National Natural Science Foundation of China(No.11805277)。
文摘This work proposes a new plasma super-phase gradient metasurfaces(PS-PGMs)structure,owing to the limitations of the thin-layer plasma for electromagnetic wave attenuation.Based on the cross-shaped surface unit configuration,we have designed the X-band absorbing structure through the dispersion control method.By setting up the Drude dispersion model in the computer simulation technology,the designed phase gradient metasurfaces structure is superposed over the plasma,and the PS-PGMs structure is constructed.The electromagnetic scattering characteristics of the new structure have been simulated,and the reflectance measurement has been carried out to verify the absorbing effect.The results demonstrate that the attenuation effect of the new structure is superior to that of the pure plasma structure,which invokes an improved attenuation effect from the thin layer plasma,thus enhancing the feasibility of applying the plasma stealth technology to the local stealth of the strong scattering part of a combat aircraft.
文摘ABBAS, Ghasemizad (6): 506 ABBASI, Vahid (6): 586 ABDELMALEK, Fatiha (9): 915 ABDOLAHI, Z. (1): 37 ABHANGI, Mitul (2): 166 ADDOU, Ahmed (9): 915 AFZAL, H. (9): 900 AGAH, K. Mikaili (5): 485 AHMAD, M. A. (9): 881 AHMAD. R. (7): 666AI, Qi (8): 791 AJAI KUMAR, (3): 204 ALAGOZ, B. B. (10): 1012 ALAGOZ, S. (10): 1012 ALISOY, G. T. (10): 1012
文摘Advisory Board (Arranged in alphabetical order),GE Changchun/(葛昌纯), University of Science and Technology Beijing, Beijing 100083, China,HE Xiantu(贺贤士)Institute of Applied Physics and Computational Mathematics, Beijing 100088, China,HUO Yuping(霍裕平)Zhengzhou University, Zhengzhou 450052, China .