Phase transformation of the La0.7Mg0.3Ni2.8Co0.5-H2 system studied by in situ X-ray diffraction

被引：0

作者：

Chai, Yujun ^{[1
]}

Asano, Kohta ^{[1
]}

Sakaki, Kouji ^{[1
]}

Enoki, Hirotoshi ^{[1
]}

Akiba, Etsuo ^{[1
]}

机构：

[1] National Institute of Advanced Industrial Science and Technology (AIST), AIST Central-5, 1-1-1, Higashi, Tsukuba, Ibaraki, 305-8565, Japan

来源：

Journal of Alloys and Compounds | 2009年 / 485卷 / 1-2期

关键词：

Phase transformation in the La0.7Mg0.3Ni2.8Co0.5-H2 system along the hydrogen absorption and desorption pressure-composition isotherm was studied using in situ X-ray diffraction. La0.7Mg0.3Ni2.8Co0.5 consisted mainly of the Ce2Ni7-type La3Mg(Ni; Co)14 phase. In hydrogen absorption of the Ce2Ni7-type phase; the hydrogen solid solution and hydride phases coexisted. The solid solution phase transformed to the hydride phase with isotropic expansion of the crystal lattice. In hydrogen desorption; coexistence of the two phases was not observed and the crystal lattice consecutively reduced with reduction of the hydrogen content. Lattice strain in the Ce2Ni7-type phase in hydrogen desorption was higher than that in hydrogen absorption. © 2009 Elsevier B.V. All rights reserved;

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摘要：

Journal article (JA)

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页码：174 / 180