Crystal structures of novel La-Mg-Ni hydrogen absorbing alloys

E. Akiba; H. Hayakawa; T. Kohno

doi:10.1016/j.jallcom.2005.04.180

Crystal structures of novel La-Mg-Ni hydrogen absorbing alloys

E. Akiba, H. Hayakawa, T. Kohno

Research output: Contribution to journal › Conference article › peer-review

95 Citations (Scopus)

Abstract

Crystal structures of La_0.70Mg_0.30Ni _2.5Co_0.5 (alloy T1) and La_0.75Mg _0.25Ni_3.0Co_0.5 (alloy T2) were investigated. From the structural analysis for small particles picked up from crushed ingot, we found that the alloy T1 consisted of Ce₂Ni₇-type and PuNi₃-type phases and that the alloy T2 consisted of Ce ₂Ni₇-type and Pr₅Co₁₉-type phases. These phases were made up two or three blocks that consisted of one [La ₂Ni₄] layer and one to three [LaNi₅] layers along c-axis. It was found that Mg occupied the La site in the [La ₂Ni₄] layer. Selective occupation of Mg at the La site in the [La₂Ni₄] layer makes the alloy stable in repeated hydrogenation and dehydrogenation.

Original language	English
Pages (from-to)	280-283
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	408-412
DOIs	https://doi.org/10.1016/j.jallcom.2005.04.180
Publication status	Published - Feb 9 2006
Externally published	Yes
Event	Proceedings of the Rare Earths'04 in Nara, Japan - Duration: Nov 7 2004 → Nov 12 2004

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2005.04.180

Cite this

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title = "Crystal structures of novel La-Mg-Ni hydrogen absorbing alloys",

abstract = "Crystal structures of La0.70Mg0.30Ni 2.5Co0.5 (alloy T1) and La0.75Mg 0.25Ni3.0Co0.5 (alloy T2) were investigated. From the structural analysis for small particles picked up from crushed ingot, we found that the alloy T1 consisted of Ce2Ni7-type and PuNi3-type phases and that the alloy T2 consisted of Ce 2Ni7-type and Pr5Co19-type phases. These phases were made up two or three blocks that consisted of one [La 2Ni4] layer and one to three [LaNi5] layers along c-axis. It was found that Mg occupied the La site in the [La 2Ni4] layer. Selective occupation of Mg at the La site in the [La2Ni4] layer makes the alloy stable in repeated hydrogenation and dehydrogenation.",

author = "E. Akiba and H. Hayakawa and T. Kohno",

year = "2006",

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day = "9",

doi = "10.1016/j.jallcom.2005.04.180",

language = "English",

volume = "408-412",

pages = "280--283",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier BV",

note = "Proceedings of the Rare Earths'04 in Nara, Japan ; Conference date: 07-11-2004 Through 12-11-2004",

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TY - JOUR

T1 - Crystal structures of novel La-Mg-Ni hydrogen absorbing alloys

AU - Akiba, E.

AU - Hayakawa, H.

AU - Kohno, T.

PY - 2006/2/9

Y1 - 2006/2/9

N2 - Crystal structures of La0.70Mg0.30Ni 2.5Co0.5 (alloy T1) and La0.75Mg 0.25Ni3.0Co0.5 (alloy T2) were investigated. From the structural analysis for small particles picked up from crushed ingot, we found that the alloy T1 consisted of Ce2Ni7-type and PuNi3-type phases and that the alloy T2 consisted of Ce 2Ni7-type and Pr5Co19-type phases. These phases were made up two or three blocks that consisted of one [La 2Ni4] layer and one to three [LaNi5] layers along c-axis. It was found that Mg occupied the La site in the [La 2Ni4] layer. Selective occupation of Mg at the La site in the [La2Ni4] layer makes the alloy stable in repeated hydrogenation and dehydrogenation.

AB - Crystal structures of La0.70Mg0.30Ni 2.5Co0.5 (alloy T1) and La0.75Mg 0.25Ni3.0Co0.5 (alloy T2) were investigated. From the structural analysis for small particles picked up from crushed ingot, we found that the alloy T1 consisted of Ce2Ni7-type and PuNi3-type phases and that the alloy T2 consisted of Ce 2Ni7-type and Pr5Co19-type phases. These phases were made up two or three blocks that consisted of one [La 2Ni4] layer and one to three [LaNi5] layers along c-axis. It was found that Mg occupied the La site in the [La 2Ni4] layer. Selective occupation of Mg at the La site in the [La2Ni4] layer makes the alloy stable in repeated hydrogenation and dehydrogenation.

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DO - 10.1016/j.jallcom.2005.04.180

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AN - SCOPUS:31144441027

SN - 0925-8388

VL - 408-412

SP - 280

EP - 283

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

T2 - Proceedings of the Rare Earths'04 in Nara, Japan

Y2 - 7 November 2004 through 12 November 2004

ER -

Crystal structures of novel La-Mg-Ni hydrogen absorbing alloys

Abstract

All Science Journal Classification (ASJC) codes

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