Abstract
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.
Original language | English |
---|---|
Pages (from-to) | 174-180 |
Number of pages | 7 |
Journal | Journal of Alloys and Compounds |
Volume | 485 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - Oct 19 2009 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
Cite this
Phase transformation of the La0.7Mg0.3Ni2.8Co0.5-H2 system studied by in situ X-ray diffraction. / Chai, Yujun; Asano, Kohta; Sakaki, Kouji; Enoki, Hirotoshi; Akiba, Etsuo.
In: Journal of Alloys and Compounds, Vol. 485, No. 1-2, 19.10.2009, p. 174-180.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Phase transformation of the La0.7Mg0.3Ni2.8Co0.5-H2 system studied by in situ X-ray diffraction
AU - Chai, Yujun
AU - Asano, Kohta
AU - Sakaki, Kouji
AU - Enoki, Hirotoshi
AU - Akiba, Etsuo
PY - 2009/10/19
Y1 - 2009/10/19
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=72049125318&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=72049125318&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2009.05.117
DO - 10.1016/j.jallcom.2009.05.117
M3 - Article
AN - SCOPUS:72049125318
VL - 485
SP - 174
EP - 180
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
IS - 1-2
ER -