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and high energy ball milling, then the powders prepared were sealed in evacuated quartz tubes for homogenization annealing at 1 123 K for 2 h. The phase structure and the microstructure of the alloys... the region near the least reflectivity peak. Key words: Y-Fe-Cr alloy; microwave absorber; arc melting method; high energy ball milling 随着现代雷达和微波电子技术的迅猛发展,使吸波材料在国防和民用领域得到广泛应用.特别是由于移动通讯和电子设备在日常生活中使用越来越广泛,因此......
storage kinetics of the composites reaches a maximum value with the variation of milling time.Increasing Ni content and milling time both make the hydrogen desorption activation energy lower, which... milling, and their gaseous and electrochemical hydrogen storage kinetics performance were systematically investigated. The results indicate that the as-milled composites exhibit excellent hydrogen storage......
. Mechanical milling changed the dehydriding reaction rate-controlling step from surface penetration to diffusion and reduced the activation energy from 204.6 to 87.4 kJ/mol H2. The optimum milled duration...Hydriding/dehydriding behaviors of La2Mg17-10 wt.%Ni composite prepared by mechanical milling刘静1,李谦21. School of Materials and Architectural Engineering,Guizhou Normal University2. Shanghai Key......
. Mechanical milling changed the dehydriding reaction rate-controlling step from surface penetration to diffusion and reduced the activation energy from 204.6 to 87.4 kJ/mol H2. The optimum milled duration...Hydriding/dehydriding behaviors of La2Mg17-10 wt.%Ni composite prepared by mechanical milling刘静1,李谦21. School of Materials and Architectural Engineering,Guizhou Normal University2. Shanghai Key......
by mechanical milling.Effects of Ni content and milling time on the gaseous hydrogen storage thermodynamics and dynamics of alloys were systematically investigated.The hydrogen desorption properties... equation.Hydrogen desorption activation energy of alloy hydride was estimated by Arrhenius and Kissinger methods.The increase in Ni content has a slight effect on the thermodynamic properties of alloys......
discontinuous mechanical milling(DMM) instead of milling and ignition of the produced thermite. The results of energy dispersive X-ray spectroscopy(EDX) and X-ray diffraction(XRD) of samples with varying milling time indicate that this fabrication process requires considerable mechanical energy. It is shown that Al2Ti–Al2O3 IMC with small grain size was produced by DMM after 15 h of ball milling......
are also determined to be109.2 and 144.2 kJ/mol,respectively.The increase of growth exponent and rise of activation energy for crystallite growth in MgH2-10 wt% Pr3 Al11 composite are ascribed......
Institute摘 要:SmCo6.6Nb0.4nanoflakes with TbCu7structure were successfully prepared by surfactant-assisted high energy ball milling(SA-HEBM)with heptane and oleic...Crystal structure and magnetic properties of SmCo6.6Nb0.4 nanoflakes prepared by surfactant-assisted ball milling潘蕊1,岳明1,张东涛1,高学绪2,刘卫强1,张久兴1,郭朝辉3,李卫31. College of Materials Science and Engineering......
