The Experts below are selected from a list of 312 Experts worldwide ranked by ideXlab platform
Xiaochen Wang - One of the best experts on this subject based on the ideXlab platform.
-
Analysis of Temperature Field, Heat and Fluid Flow of Two-Phase Zone Continuous Casting Cu–Sn Alloy Wire
Archives of Foundry Engineering, 2016Co-Authors: Xiaochen WangAbstract:Abstract Cu–4.7 wt. % Sn alloy wire with Ø10 mm was prepared by two-Phase Zone continuous casting technology, and the temperature field, heat and fluid flow were investigated by the numerical simulated method. As the melting temperature, mold temperature, continuous casting speed and cooling water temperature is 1200 °C, 1040 °C, 20 mm/min and 18 °C, respectively, the alloy temperature in the mold is in the range of 720 °C–1081 °C, and the solid/liquid interface is in the mold. In the center of the mold, the heat flow direction is vertically downward. At the upper wall of the mold, the heat flow direction is obliquely downward and deflects toward the mold, and at the lower wall of the mold, the heat flow deflects toward the alloy. There is a complex circular flow in the mold. Liquid alloy flows downward along the wall of the mold and flows upward in the center.
-
Surface quality, microstructure and mechanical properties of Cu–Sn alloy plate prepared by two-Phase Zone continuous casting
Transactions of Nonferrous Metals Society of China, 2015Co-Authors: Xiaochen WangAbstract:Abstract Cu–4.7%Sn (mass fraction) alloy plate was prepared by the self-developed two-Phase Zone continuous casting (TZCC) process. The relationship between process parameters of TZCC and surface quality of the alloy plate was investigated. The microstructure and mechanical properties of the TZCC alloy plate were analyzed. The results show that Cu–4.7%Sn alloy plate with smooth surface can be obtained by means of reasonable matching the entrance temperature of two-Phase Zone mold and the continuous casting speed. The microstructure of the TZCC alloy is composed of grains-covered grains, small grains with self-closed grain boundaries, columnar grains and equiaxed grains. Compared with cold mold continuous casting Cu–4.7%Sn alloy plate, the room temperature tensile strength and ductility of the TZCC alloy plate are greatly improved.
-
Columnar grains-covered small grains Cu–Sn alloy prepared by two-Phase Zone continuous casting
Progress in Natural Science: Materials International, 2013Co-Authors: Xiaochen Wang, Lin WangAbstract:Abstract A new theory of two-Phase Zone continuous casting (TZCC) has been established in order to improve mechanical properties, corrosion resistance and conductivity properties of metals with wide solid–liquid two-Phase Zone. A Cu–Sn alloy with continuous columnar grains-covered non-columnar small grains of same Phase microstructure containing many self-closed grain boundaries were produced by the self-developed TZCC process. Compared with water-cooled mold continuous casting Cu–Sn alloy, the tensile strength and ductility of the TZCC alloy are greatly improved, the corrosion resistance is improved up to fifteenfold, and the conductivity is improved by 12.2%. The excellent high strength may be due to the effective blockage of dislocation motion by numerous self-closed grain boundaries, which suppress the propagation of grain boundary corrosion, and the extremely low electrical resistivity and high ductility may be attributed to continuous columnar grains.
Kenneth M. Skulina - One of the best experts on this subject based on the ideXlab platform.
-
Hard X-ray Sputtered-Sliced Phase Zone Plates
MRS Proceedings, 2011Co-Authors: Richard M. Bionta, Kenneth M. SkulinaAbstract:ABSTRACTAl/Cu sputtered-sliced Phase Zone plates, designed to operate with a focal length of 0.18 m and 1.12 m at 8.05 keV, were tested at the Stanford Synchrotron Radiation Laboratory. The results of lens characterization and the implementation of a microscope are reported.
-
Hard x‐ray sputtered‐sliced Phase Zone plates
Applied Physics Letters, 1994Co-Authors: Richard M. Bionta, Kenneth M. Skulina, Jonathan WeinbergAbstract:Al/Cu sputtered‐sliced Phase Zone plates, designed to operate with a focal length of 18 cm at 8.05 keV, were tested at the Stanford Synchrotron Radiation Laboratory. First‐, second‐, and third‐order peaks are measured, along with a defocused condition. The first‐order focusing efficiencies ranged from 13% to 19% for the two lenses presented here. Monte Carlo simulations are compared to the data.
John J Chrzas - One of the best experts on this subject based on the ideXlab platform.
-
Hard x-ray microimaging techniques based on Phase Zone plates
Soft X-Ray Microscopy, 1993Co-Authors: Dan G Legnini, Y. H. Xiao, John J ChrzasAbstract:Phase Zone plates of high focusing efficiency and submicron resolution have been demonstrated in the hard x-ray region. A scanning microscope based on these focusing optics will create many new applications. Preliminary results in the applications of the microscope are reported here. In the area of imaging, we have utilized absorption contrast to clearly identify the locations of Au and Ni constituents in a sample of two interleaved grids. Micro-EXAFS spectra has also been obtained on a Ni foil. Fluorescence from a nuclear fuel sample, as an example of microanalysis, has revealed the elemental distribution at the interfaces. Lastly, microdiffraction from AgBr crystallites has been studied. 5 figs, 7 refs.
-
hard x ray Phase Zone plate fabricated by lithographic techniques
Applied Physics Letters, 1992Co-Authors: Dan G Legnini, F Cerrina, E Di Fabrizio, Y Xiao, John J Chrzas, P J Viccaro, V White, S Bajikar, D Denton, M GentiliAbstract:A Fresnel Phase Zone plate with an unprecedented focusing efficiency of 33% was fabricated using an x‐ray lithographic technique and was tested using synchrotron x rays. Contributions by the zeroth‐order x ray to the focus were minimal. Spatial resolution in the micrometer range was achieved. The measured spot size was dominated by geometric demagnification of the source. It should be possible to obtain submicrometer resolution by aperturing the source. Experimental results of focusing efficiency measurements, intensity distribution at the focal plane, and spatial resolution tests are reported.
-
Hard x‐ray Phase Zone plate fabricated by lithographic techniques
Applied Physics Letters, 1992Co-Authors: Dan G Legnini, John J Chrzas, P J Viccaro, V White, S Bajikar, D Denton, Y. H. Xiao, Franco CerrinaAbstract:A Fresnel Phase Zone plate with an unprecedented focusing efficiency of 33% was fabricated using an x‐ray lithographic technique and was tested using synchrotron x rays. Contributions by the zeroth‐order x ray to the focus were minimal. Spatial resolution in the micrometer range was achieved. The measured spot size was dominated by geometric demagnification of the source. It should be possible to obtain submicrometer resolution by aperturing the source. Experimental results of focusing efficiency measurements, intensity distribution at the focal plane, and spatial resolution tests are reported.
Dan G Legnini - One of the best experts on this subject based on the ideXlab platform.
-
Hard x-ray microimaging techniques based on Phase Zone plates
Soft X-Ray Microscopy, 1993Co-Authors: Dan G Legnini, Y. H. Xiao, John J ChrzasAbstract:Phase Zone plates of high focusing efficiency and submicron resolution have been demonstrated in the hard x-ray region. A scanning microscope based on these focusing optics will create many new applications. Preliminary results in the applications of the microscope are reported here. In the area of imaging, we have utilized absorption contrast to clearly identify the locations of Au and Ni constituents in a sample of two interleaved grids. Micro-EXAFS spectra has also been obtained on a Ni foil. Fluorescence from a nuclear fuel sample, as an example of microanalysis, has revealed the elemental distribution at the interfaces. Lastly, microdiffraction from AgBr crystallites has been studied. 5 figs, 7 refs.
-
hard x ray Phase Zone plate fabricated by lithographic techniques
Applied Physics Letters, 1992Co-Authors: Dan G Legnini, F Cerrina, E Di Fabrizio, Y Xiao, John J Chrzas, P J Viccaro, V White, S Bajikar, D Denton, M GentiliAbstract:A Fresnel Phase Zone plate with an unprecedented focusing efficiency of 33% was fabricated using an x‐ray lithographic technique and was tested using synchrotron x rays. Contributions by the zeroth‐order x ray to the focus were minimal. Spatial resolution in the micrometer range was achieved. The measured spot size was dominated by geometric demagnification of the source. It should be possible to obtain submicrometer resolution by aperturing the source. Experimental results of focusing efficiency measurements, intensity distribution at the focal plane, and spatial resolution tests are reported.
-
Hard x‐ray Phase Zone plate fabricated by lithographic techniques
Applied Physics Letters, 1992Co-Authors: Dan G Legnini, John J Chrzas, P J Viccaro, V White, S Bajikar, D Denton, Y. H. Xiao, Franco CerrinaAbstract:A Fresnel Phase Zone plate with an unprecedented focusing efficiency of 33% was fabricated using an x‐ray lithographic technique and was tested using synchrotron x rays. Contributions by the zeroth‐order x ray to the focus were minimal. Spatial resolution in the micrometer range was achieved. The measured spot size was dominated by geometric demagnification of the source. It should be possible to obtain submicrometer resolution by aperturing the source. Experimental results of focusing efficiency measurements, intensity distribution at the focal plane, and spatial resolution tests are reported.
Richard M. Bionta - One of the best experts on this subject based on the ideXlab platform.
-
Hard X-ray Sputtered-Sliced Phase Zone Plates
MRS Proceedings, 2011Co-Authors: Richard M. Bionta, Kenneth M. SkulinaAbstract:ABSTRACTAl/Cu sputtered-sliced Phase Zone plates, designed to operate with a focal length of 0.18 m and 1.12 m at 8.05 keV, were tested at the Stanford Synchrotron Radiation Laboratory. The results of lens characterization and the implementation of a microscope are reported.
-
Hard x‐ray sputtered‐sliced Phase Zone plates
Applied Physics Letters, 1994Co-Authors: Richard M. Bionta, Kenneth M. Skulina, Jonathan WeinbergAbstract:Al/Cu sputtered‐sliced Phase Zone plates, designed to operate with a focal length of 18 cm at 8.05 keV, were tested at the Stanford Synchrotron Radiation Laboratory. First‐, second‐, and third‐order peaks are measured, along with a defocused condition. The first‐order focusing efficiencies ranged from 13% to 19% for the two lenses presented here. Monte Carlo simulations are compared to the data.