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中文摘要：
在合金中添加Cu及Nd,用真空快淬技术制备纳米晶-非晶Mg2Ni型(Mg24Ni10Cu2)100-xNdx(x=0,5,10,15,20)合金,研究了淬速及Nd含量对合金结构及贮氢动力学性能的影响。XRD及TEM分析结果表明,铸态合金具有多相结构,包括主相Mg2Ni和第二相Nd5Mg41、Mg6Ni和Nd Ni。快淬无Nd合金具有完全的纳米晶结构,而含Nd合金则具有纳米晶-非晶结构,表明添加Nd提高了合金的非晶形成能力。贮氢动力学测试结果表明,快淬和添加Nd显著提高了合金的气态及电化学贮氢动力学。合金的高倍率放电能力(HRD)随着淬速和Nd含量的增加先增加而后减小,这主要归因于快淬及添加Nd显著提高了合金的氢扩散系数(D)和极限电流密度(IL),同时增大了电荷转移阻抗(Rct)。
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