Evidence for Existence and Generality of Competitive Reactions during Hydrogenation of Mg/Cu Superlaminate Composites
Evidence for Existence and Generality of Competitive Reactions during Hydrogenation of Mg/Cu Superlaminate Composites
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Mg/Cu 超层压复合材料氢化过程中竞争反应的存在性和普遍性的证据
DOI：
10.1007/978-3-319-48764-9_13
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
S. Kikuchi
中科院分区：
文献类型：
--
作者：
Koji Tanaka;H. Takeshita;K. Shibata;Y. Nishida;K. Kurumatani;H. Miyamura;S. Kikuchi
通过实验研究了 Mg/Cu 超层压复合材料氢化过程中竞争反应的存在性和普遍性。复合材料在573K、86.4ks和3.3MPa H2条件下氢化后，观察到两种类型的MgCu2形态：3D网络和层状形态。我们提出 Mg/Cu 超层复合材料可以通过两种工艺进行氢化。一种是将 Mg 与 Cu 合金化为 Mg2Cu，然后对 Mg2Cu 进行氢化，从而形成 3D 网络 MgCu2。另一种是 Mg 氢化，然后 MgH2 与 Cu 反应，导致形成层状 MgCu2。然而，氢气气氛下MgH2与Cu的反应目前尚不清楚。因此，为了证明该反应的存在性和普遍性，将MgH2和Cu粉球团在673K、86.4ks和8.0MPa H2的条件下加热。 SEM 观察证实了层状 MgCu2 的形成。
Existence and generality of competitive reactions during hydrogenation of Mg/Cu superlaminate composites were investigated experimentally. Two types of MgCu2forms, 3D-network and layered ones, were observed after hydrogenation of the composites under the conditions of 573K, 86.4ks and 3.3MPa of H2. We proposed that Mg/Cu super-laminate composites could be hydrogenated by two kinds of processes. The one is alloying Mg with Cu to Mg2Cu followed by hydrogenation of Mg2Cu, leading to the formation of 3D-network MgCu2. The other is hydrogenation of Mg followed by a reaction of MgH2to Cu, leading to the formation of layered MgCu2. However, the reaction of MgH2to Cu under hydrogen atmosphere is not known in general. Therefore, in order to prove the existence and the generality of this reaction, pellets of MgH2and Cu powder were heated under the conditions of 673K, 86.4ks and 8.0MPa of H2. The formation of layered MgCu2was confirmed by SEM observations.