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“与Laves相相关的BCC固溶体”是一个新概念,由此发展起来的新型钛基BCC合金贮氢能力已经达到了2.2%(质量分数)。Akiba等用TEM(透射电子显微镜)方法观测TiMnV合金的BCC相和C14相的交界面,发现存在一个厚度为10 nm的薄层。通过EDX(电子探针X射线显微分析)方法观测,这个薄层物质的组成为Ti1.0Mn0.9V1.1,但是Ti1.0Mn0.9V1.1却不具备电化学活性。在此基础上,从Ti1.0Mn0.9V1.1出发,通过组成元素的部分取代,使储氢性能优良的Ti1.0Mn0.9V1.1具有电催化活性,对Ti1.0Mn0.9V1.1系合金的结构和电化学性能进行研究,Ti1.0Mn0.9V1.1系合金有可能成为MH-Ni蓄电池潜在的高温负极材料。 相似文献
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研究适用于电动车用大型动力MH/Ni电池,是电池工作者的研究重点之一.本文采用机械合金化方法制备MgNi合金,用作MH/Ni电池金属氢化物电极,研究了温度对其电化学性能的影响,探索MgNi合金作为MH/Ni动力电池负极材料的可能性.TEM测试结果表明机械合金化方法制备的MgNi合金为纳米结构,粒径在10nm以下.在30℃和70℃条件下测定金属氢化物电极的电化学性能,结果表明在70℃时电化学容量173mA·h·g-1,约为在30℃放电容量110mA·h·g-1的1.6倍,大电流充放电及高倍率放电性能高温优于低温. 相似文献
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In order to improve performance of Ti-V-based solid solution alloy, electrochemical characteristics and synergetic effect of Ti0.10Zr0.15V0.35Cr0.10Ni0.30-10 wt.%LaNi5 hydrogen storage composite electrode prepared by two-step arc-melting were investigated system-atically. X-ray diffractometry (XRD) and scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) showed that the main phase of composite alloy was composed of V-based solid solution phase with a BCC structure and C14 Laves phase with hexagonal structure, while secondary phase also existed in the composite alloy. The results showed that electrochemical characteristics of the composite alloy elec-trode were significantly improved. It was suggested that synergetic effect appeared in the maximum discharge capacity of the composite alloy, synergetic effect of the discharge capacity appeared in the activation process, in the composite process, in the cyclic process, in the discharge process at low/high temperature and at different current densities, and synergetic effect existed in the charge-transfer resistance and in the ex-change current density, which seemed to be related to formation of the secondary phase. 相似文献
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稀土铝合金在硫酸、草酸溶液中的阳极氧化 总被引:1,自引:0,他引:1
本文对添加稀土的铝合金在硫酸和草酸溶液中进行了阳极氧化,比较系统地作了电解液浓度、湿度、电流密度、氧化时间诸因素对氧化膜厚度影响,试验结果表明:稀土铝合金膜层致密,稀土含量为0.29%时为宜;并研究了影响膜厚度的诸因素,找到了较好的工艺条件。 相似文献
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近年来,铝质材料在建筑业方面取得极广泛的应用。建筑用铝合金的装饰与防护系数是采用硫酸溶液,阳极氧化后,用电解着色方法着成青铜-古铜色系,使其具有古朴、典雅。庄重的外观。引起世界各国科学家、建筑家和工艺美术家极大的兴趣。改善铝合金着色防护层的性能,对延长材料的使用寿命和开拓功能材料新用途都具有重要意义。 相似文献
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