Role of the triclinic Al2Fe structure in the formation of the Al5Fe2-approximant

Akihiko Hirata; Yuichiro Mori; Manabu Ishimaru; Yasumasa Koyama

doi:10.1080/09500830802247151

Role of the triclinic Al₂Fe structure in the formation of the Al₅Fe₂-approximant

Akihiko Hirata^*, Yuichiro Mori, Manabu Ishimaru, Yasumasa Koyama

^*この研究の対応する著者

基幹理工学部

研究成果: Article › 査読

7 被引用数 (Scopus)

抄録

The structural correspondence among the bcc, ordered-bcc B2, triclinic Al₂Fe and approximant Al₅Fe₂ structures have been examined on the basis of the experimentally obtained orientation relationship of (110)_bcc,B2 //(22̄1)_Al2_Fe and [1̄11]_bcc,B2 //N(241)_Al2_Fe, where N(hkl) denotes the normal direction of the (hkl) plane. The formation of the triclinic Al₂Fe structure from the bcc structure is directly associated with that of Al-Fe covalent bonds; that is, hybridization between Al and Fe atoms. The covalent bond formation results in the appearance of decagonal-like atomic arrangements in the Al₂Fe structure, which are similar to those in the approximant Al₅Fe₂ structure.

本文言語	English
ページ（範囲）	491-500
ページ数	10
ジャーナル	Philosophical Magazine Letters
巻	88
号	7
DOI	https://doi.org/10.1080/09500830802247151
出版ステータス	Published - 2008 7月

ASJC Scopus subject areas

凝縮系物理学

文献へのアクセス

10.1080/09500830802247151

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引用スタイル

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title = "Role of the triclinic Al2Fe structure in the formation of the Al5Fe2-approximant",

abstract = "The structural correspondence among the bcc, ordered-bcc B2, triclinic Al2Fe and approximant Al5Fe2 structures have been examined on the basis of the experimentally obtained orientation relationship of (110)bcc,B2 //(2{\=2}1)Al2Fe and [{\=1}11]bcc,B2 //N(241)Al2Fe, where N(hkl) denotes the normal direction of the (hkl) plane. The formation of the triclinic Al2Fe structure from the bcc structure is directly associated with that of Al-Fe covalent bonds; that is, hybridization between Al and Fe atoms. The covalent bond formation results in the appearance of decagonal-like atomic arrangements in the Al2Fe structure, which are similar to those in the approximant Al5Fe2 structure.",

keywords = "Aluminium alloys, Approximants, Crystal structure, Electron diffraction, Electron irradiation, Electron microscopy, Intermetallic compounds",

author = "Akihiko Hirata and Yuichiro Mori and Manabu Ishimaru and Yasumasa Koyama",

note = "Funding Information: This study was partially supported by the Ministry of Education, Science, Sports and Culture, Grant-in-Aid for Scientific Research (B), 18360306, 2006.",

year = "2008",

month = jul,

doi = "10.1080/09500830802247151",

language = "English",

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AU - Hirata, Akihiko

AU - Mori, Yuichiro

AU - Ishimaru, Manabu

AU - Koyama, Yasumasa

N1 - Funding Information: This study was partially supported by the Ministry of Education, Science, Sports and Culture, Grant-in-Aid for Scientific Research (B), 18360306, 2006.

PY - 2008/7

Y1 - 2008/7

N2 - The structural correspondence among the bcc, ordered-bcc B2, triclinic Al2Fe and approximant Al5Fe2 structures have been examined on the basis of the experimentally obtained orientation relationship of (110)bcc,B2 //(22̄1)Al2Fe and [1̄11]bcc,B2 //N(241)Al2Fe, where N(hkl) denotes the normal direction of the (hkl) plane. The formation of the triclinic Al2Fe structure from the bcc structure is directly associated with that of Al-Fe covalent bonds; that is, hybridization between Al and Fe atoms. The covalent bond formation results in the appearance of decagonal-like atomic arrangements in the Al2Fe structure, which are similar to those in the approximant Al5Fe2 structure.

AB - The structural correspondence among the bcc, ordered-bcc B2, triclinic Al2Fe and approximant Al5Fe2 structures have been examined on the basis of the experimentally obtained orientation relationship of (110)bcc,B2 //(22̄1)Al2Fe and [1̄11]bcc,B2 //N(241)Al2Fe, where N(hkl) denotes the normal direction of the (hkl) plane. The formation of the triclinic Al2Fe structure from the bcc structure is directly associated with that of Al-Fe covalent bonds; that is, hybridization between Al and Fe atoms. The covalent bond formation results in the appearance of decagonal-like atomic arrangements in the Al2Fe structure, which are similar to those in the approximant Al5Fe2 structure.

KW - Aluminium alloys

KW - Approximants

KW - Crystal structure

KW - Electron diffraction

KW - Electron irradiation

KW - Electron microscopy

KW - Intermetallic compounds

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