Structural and hydriding properties of (Mg1-xCax)Ni2 Laves phase alloys
Structural and hydriding properties of (Mg1-xCax)Ni2 Laves phase alloys
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DOI：
10.1016/s0925-8388(01)01563-8
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发表时间：
2001-08
影响因子：
6.2
通讯作者：
N. Terashita;K. Kobayashi;T. Sasai;E. Akiba
中科院分区：
文献类型：
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作者：
N. Terashita;K. Kobayashi;T. Sasai;E. Akiba
成功地研制出了具有室温放氢性能的新型镁基准二元合金(−_xCax)Ni_2。该合金可以通过传统的熔炼方法和退火法来合成。(Mg_1，−_xCax)Ni_2(0.32≤x≤_(1.0))的晶体结构为C15Laves相型，在此成分范围内为单相。在常温下，在压力-组成等温线上观察到平坦的平台。在313K下，氢气压力为3.5Mpa时，氢气的最大质量分数为1.4%(H/M≈.7)。讨论了Ca替代Mg对晶格参数、氢平衡压力和氢化过程中相变的影响。
Novel Mg-based pseudo-binary alloys (Mg1−xCax)Ni2which desorb hydrogen at room temperature were successfully developed. The alloys can be synthesized by a conventional melting method and annealing technique. The crystal structure of annealed (Mg1−xCax)Ni2(0.32≤x≤1.0) was the C15 Laves phase type and in this composition range the alloys were single phase. Flat plateaus in the pressure–composition isotherms were observed at ambient temperatures. The maximum hydrogen content of the present study is 1.4 mass% (H/M≈0.7) under hydrogen pressure of 3.5 MPa at 313 K. The effects of substitution of Ca for Mg on the lattice parameter, hydrogen equilibrium pressure and phase changes with hydrogenation are discussed.