A hexagonal phase related to quasicrystalline phases in Zn-Mg-rare-earth system

被引：36

作者：

Singh, A ^{[1
]}

Abe, E ^{[1
]}

Tsai, AP ^{[1
]}

机构：

[1] Natl Res Inst Met, Tsukuba, Ibaraki 305, Japan

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 1998年 / 77卷 / 02期

关键词：

D O I：

10.1080/095008398178660

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Z-Zn6Mg3Sm ternary phase has been studied by electron diffraction. Y and the rare-earth elements with atomic radii just below thar of Sm in Zn6Mg3RE alloys (RE = rare earth or Y) form the icosahedral phase, while with Sm it forms the Z phase. The Z phase is hexagonal with a = 12.4 Angstrom and c = 8.8 Angstrom, and with the space group P6(3)/mmc. The relationship of this phase to the icosahedral quasicrystal is demonstrated through diffraction features. It is shown that this hexagonal phase consists of three icosahedral units rotated by 120 degrees about a common twofold axis, forming the sixfold axis. The similarity of this hexagonal phase to the hexagonal quasicrystal is shown.

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页码：95 / 103

页数：9

相关论文

共 15 条

[1] AL-MN MU-PHASE AND ITS RELATION TO QUASI-CRYSTALS [J].

BENDERSKY, L .

JOURNAL OF MICROSCOPY-OXFORD, 1987, 146 :303-312

[2]

DRITS ME, 1985, IZV AKAD NAUK SSSR M, P194

[3] QUASI-CRYSTALS IN AS-CAST MG-ZN-RE ALLOYS [J].

LUO, ZP ;

ZHANG, SQ ;

TANG, YL ;

ZHAO, DS .

SCRIPTA METALLURGICA ET MATERIALIA, 1993, 28 (12) :1513-1518

[4] STABLE ZN-MG-RARE-EARTH FACE-CENTERED ICOSAHEDRAL ALLOYS WITH PENTAGONAL DODECAHEDRAL SOLIDIFICATION MORPHOLOGY [J].

NIIKURA, A ;

TSAI, AP ;

INOUE, A ;

MASUMOTO, T .

PHILOSOPHICAL MAGAZINE LETTERS, 1994, 69 (06) :351-355

[5] NEW CLASS OF AMORPHOUS AND ICOSAHEDRAL PHASES IN ZN-MG RARE-EARTH-METAL ALLOYS [J].

NIIKURA, A ;

TSAI, AP ;

INOUE, A ;

MASUMOTO, T .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 1994, 33 (11A) :L1538-L1541

[6] ELECTRON-MICROSCOPY AND DIFFRACTION OF ICOSAHEDRAL TWINS IN AN ALUMINUM-MANGANESE ALLOY [J].

RANGANATHAN, S ;

PRASAD, R ;

MUKHOPADHYAY, NK .

PHILOSOPHICAL MAGAZINE LETTERS, 1989, 59 (06) :257-263

[7]

RANGANATHAN S, 1993, CRYSTAL QUASICRYSTAL, P83

[8] NEW QUASI-PERIODIC PHASE IN AL85CR15 [J].

SELKE, H ;

VOGG, U ;

RYDER, PL .

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1994, 141 (01) :31-41

[9] METALLIC PHASE WITH LONG-RANGE ORIENTATIONAL ORDER AND NO TRANSLATIONAL SYMMETRY [J].

SHECHTMAN, D ;

BLECH, I ;

GRATIAS, D ;

CAHN, JW .

PHYSICAL REVIEW LETTERS, 1984, 53 (20) :1951-1953

[10] ON THE VARIETY OF ELECTRON-DIFFRACTION PATTERNS FROM A FACE-CENTERED ICOSAHEDRAL QUASI-CRYSTAL [J].

SINGH, A ;

RANGANATHAN, S .

SCRIPTA METALLURGICA ET MATERIALIA, 1991, 25 (02) :409-412