主要研究了汞含量对材料电性能和自腐蚀的影响。采用密封熔炼的方式制备了高性能海水激活电池用阳极材料Mg-Hg-Ga合金,采用ICP、金相显微镜、恒流极化等测试方法对材料的成分、组织结构及电化学性能进行表征,采用析氢装置测试静态腐蚀速...主要研究了汞含量对材料电性能和自腐蚀的影响。采用密封熔炼的方式制备了高性能海水激活电池用阳极材料Mg-Hg-Ga合金,采用ICP、金相显微镜、恒流极化等测试方法对材料的成分、组织结构及电化学性能进行表征,采用析氢装置测试静态腐蚀速率,采用与氯化亚铜组装成电池放电对其电性能进行测试。实验结果表明,制备的材料都有良好的组织,晶粒细小均匀,成分均匀,放电电位负移,析氢低,激活快,成泥少,放电后表面腐蚀均匀,无局部穿孔。在镓质量含量为1.6%时,最佳汞含量为1.3%,激活最快为0.9 s,放电析氢量最低为0.5 m L/min·cm2。展开更多
The effect of Al and Zn additives on the grain size of Mg-3Ni-2MnO_(2) alloy was investigated.The nanostructured Mg-3Ni-2MnO_(2) and Mg-3Ni-2MnO_(2)-3Al-Zn were made by ball milling process under hydrogen atmosphere.T...The effect of Al and Zn additives on the grain size of Mg-3Ni-2MnO_(2) alloy was investigated.The nanostructured Mg-3Ni-2MnO_(2) and Mg-3Ni-2MnO_(2)-3Al-Zn were made by ball milling process under hydrogen atmosphere.The XRD results and TEM analysis reveal that Al and Zn additives almost have no effect on the grain size of Mg-3Ni-2MnO_(2) alloy.The present study provides us a feasibility of producing nano-structured magnesium alloys,based on hydrogenation,disproportionation,desorption and recombination(HDDR),by adding beneficial elements to hydrogen storage materials.展开更多
Nanostructured Mg-3Ni-2MnO_(2) was synthesized by ball milling elemental powders of Mg,Ni and MnO_(2) in hydrogen atmosphere.The microstructures of the powder prepared at different milling time were analyzed by X-ray ...Nanostructured Mg-3Ni-2MnO_(2) was synthesized by ball milling elemental powders of Mg,Ni and MnO_(2) in hydrogen atmosphere.The microstructures of the powder prepared at different milling time were analyzed by X-ray diffractometry(XRD), scanning electron microscopy(SEM)and high resolution electron microscopy(HREM).The milling time is the most key parameter impacting on the grain size and the microstructure of material.With prolonging the milling time,particle size becomes smaller and smaller.But after the ball milling time reaches about 20 h,reduction of grain size becomes slowly.When the milling time is more than 50 h,nanocrystalline fully forms.When the milling time is more than 80 h,there are more amorphous phases in materials.The average particle diameter of material is about 1μm and the grain size is 10-30 nm.展开更多
文摘主要研究了汞含量对材料电性能和自腐蚀的影响。采用密封熔炼的方式制备了高性能海水激活电池用阳极材料Mg-Hg-Ga合金,采用ICP、金相显微镜、恒流极化等测试方法对材料的成分、组织结构及电化学性能进行表征,采用析氢装置测试静态腐蚀速率,采用与氯化亚铜组装成电池放电对其电性能进行测试。实验结果表明,制备的材料都有良好的组织,晶粒细小均匀,成分均匀,放电电位负移,析氢低,激活快,成泥少,放电后表面腐蚀均匀,无局部穿孔。在镓质量含量为1.6%时,最佳汞含量为1.3%,激活最快为0.9 s,放电析氢量最低为0.5 m L/min·cm2。
基金Project(DCQQ24404018)supported by Scientific and Technological Program of Heilongjiang Province,China。
文摘The effect of Al and Zn additives on the grain size of Mg-3Ni-2MnO_(2) alloy was investigated.The nanostructured Mg-3Ni-2MnO_(2) and Mg-3Ni-2MnO_(2)-3Al-Zn were made by ball milling process under hydrogen atmosphere.The XRD results and TEM analysis reveal that Al and Zn additives almost have no effect on the grain size of Mg-3Ni-2MnO_(2) alloy.The present study provides us a feasibility of producing nano-structured magnesium alloys,based on hydrogenation,disproportionation,desorption and recombination(HDDR),by adding beneficial elements to hydrogen storage materials.
文摘Nanostructured Mg-3Ni-2MnO_(2) was synthesized by ball milling elemental powders of Mg,Ni and MnO_(2) in hydrogen atmosphere.The microstructures of the powder prepared at different milling time were analyzed by X-ray diffractometry(XRD), scanning electron microscopy(SEM)and high resolution electron microscopy(HREM).The milling time is the most key parameter impacting on the grain size and the microstructure of material.With prolonging the milling time,particle size becomes smaller and smaller.But after the ball milling time reaches about 20 h,reduction of grain size becomes slowly.When the milling time is more than 50 h,nanocrystalline fully forms.When the milling time is more than 80 h,there are more amorphous phases in materials.The average particle diameter of material is about 1μm and the grain size is 10-30 nm.
