Hydrogenation Property and Eutectic Structure of a Mg-Mg2Ni Two-Phase Alloy
Hydrogenation Property and Eutectic Structure of a Mg-Mg2Ni Two-Phase Alloy
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DOI：
10.2320/jinstmet.69.810
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发表时间：
2005
影响因子：
--
通讯作者：
K. Kominato;H. Homma;H. Saitoh
中科院分区：
文献类型：
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作者：
K. Kominato;H. Homma;H. Saitoh
我们研究了在密封钢坩埚中熔化 Mg 和 Ni 制成的 Mg-Mg2Ni 两相合金的氢化性能与共晶结构之间的关系。对于炉冷和水冷试样，氢含量和平台压力均随着PCT（压力-成分-温度）曲线测量温度的升高而增加。在这些样品中，随着400℃下PCT测量循环次数的增加，最大氢含量增加至5.6质量%。另一方面，热处理样品的最大氢含量不依赖于PCT循环数，并保持约5.6质量％的较高值。炉冷和水冷样品的共晶组织均良好，而热处理样品的共晶组织较粗。加氢行为取决于共晶组织的形貌，即共晶组织的粗化导致加氢加速。
We investigated the relation between hydrogenation property and eutectic structure of a Mg-Mg2Ni two-phase alloy that is made by melting Mg and Ni in a sealed steel crucible. Both the hydrogen content and the plateau pressure increase with the rise of the measurement temperature of PCT (Pressure-Composition-Temperature) curve for both the furnace cooled and water cooled specimens. In these specimens, the maximum hydrogen contents increase up to 5.6 mass% as the increase of the cycle number of PCT measurement at 400°C. On the other hand, the maximum hydrogen content of the heat treated specimen does not depend on the PCT cycle number, and maintains a higher value of about 5.6 mass%. The eutectic structures are fine for both the furnace cooled and water cooled specimens, and coarse for the heat-treated specimen. The hydrogenation behavior depends on the morphology of the eutectic structure, that is, the coarsening of the eutectic structure causes the acceleration of hydrogenation.