Formation of BCC TiFe hydride under high hydrogen pressure
Formation of BCC TiFe hydride under high hydrogen pressure
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DOI：
10.1016/j.ijhydene.2013.03.120
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发表时间：
2013-05
影响因子：
7.2
通讯作者：
Naruki Endo;H. Saitoh;A. Machida;Y. Katayama
中科院分区：
文献类型：
--
作者：
Naruki Endo;H. Saitoh;A. Machida;Y. Katayama
采用同步辐射原位X射线衍射技术研究了TiFe二元合金在5GPa和600 °C下的氢化反应。氢在TiFe中形成固溶体后，TiFe金属晶格发生有序-无序相变，生成体心立方TiFe氢化物。体心立方氢化物的晶胞体积在氢化反应后增加了21.0%。其体积膨胀大于室温下氢化制备的γ-氢化物TiFeH1.9的体积膨胀。
We investigated the hydrogenation of a binary TiFe alloy at 5 GPa and 600 °C by in situ synchrotron radiation X-ray diffraction measurements. After formation of a solid solution of hydrogen in TiFe, an order–disorder phase transition in the metal lattice of TiFe occurred, which yielded a BCC TiFe hydride. The unit cell volume of the BCC hydride increased by 21.0% after the hydrogenation reaction. The volume expansion was larger than that of a γ-hydride TiFeH1.9prepared by hydrogenation near ambient conditions.