Stacking Faults and a Novel Structural Polytype in a Hydrogen-Storage (La<SUB>0.8</SUB>Mg<SUB>0.2</SUB>)Ni<SUB>3.5</SUB> Alloy with Block-Stacking Superstructures
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- Ishikawa Ryo
- Department of Materials Engineering, The University of Tokyo
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- Abe Eiji
- Department of Materials Engineering, The University of Tokyo
Bibliographic Information
- Other Title
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- Stacking faults and a novel structural polytype in a hydrogen-storage (La0.8Mg0.2)Ni3.5 alloy with block-stacking superstructures
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Abstract
We investigated the microstructure of a hydrogen-storage (La0.8Mg0.2)Ni3.5 alloy with block-stacking superstructures by electron diffraction and Z-contrast scanning transmission electron microscopy (STEM), particularly focusing on the type of stacking fault structures and possible occurrence of novel structural variants. It was found that two major phases coexist in the alloy, which are of 5:19-2H type and 5:19-3R type superstructures that are constructed by the common structural blocks but with different stacking sequences. A high density of stacking faults were often observed, most of which were of inter-block-layer type that does not change the intra-block structure but simply alters local stacking sequence of the blocks. As a minor phase in the alloy, we identified a novel polytype structure represented as 5:19-12R, whose long-period block-stacking sequence is described as ABCA′CABC′BCAB′.
Journal
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 50 (5), 943-947, 2009
The Japan Institute of Metals and Materials
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Details 詳細情報について
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- CRID
- 1390282679226113408
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- NII Article ID
- 10024814136
- 130004454241
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- NII Book ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL BIB ID
- 10213878
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed