THERMAL-STABILITY OF AL-CU-FE ICOSAHEDRAL ALLOYS

被引：55

作者：

BESSIERE, M ^{[1
]}

QUIVY, A ^{[1
]}

LEFEBVRE, S ^{[1
]}

DEVAUDRZEPSKI, J ^{[1
]}

CALVAYRAC, Y ^{[1
]}

机构：

[1] CTR ETUD CHIM MET,CNRS,F-94407 VITRY,FRANCE

来源：

JOURNAL DE PHYSIQUE I | 1991年 / 1卷 / 12期

关键词：

D O I：

10.1051/jp1:1991242

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A stable ideally quasiperiodic phase exists in a small range of concentration, close to the composition Al62Cu25.5Fe12.5. Reducing the iron content, or replacing small amounts of copper by aluminium, lead to icosahedral alloys which exhibit around 650-degrees-C structural transformations of unclear nature: in the X-ray powder diffraction pattern, the peak profiles become purely Lorentzian (Al62.3Cu25.3Fe12.4) or diffuse << side-bands >> appear in the tails of the Bragg peaks (Al63Cu24.5Fe12.5). In the last case long annealing treatments eventually transform the Bragg peaks into diffuse peaks located at positions clearly off the ideal icosahedral symmetry. Small deviations from this composition range lead to Bragg peaks with shoulders whatever the heat-treatment may be; perfect icosahedral order is never obtained for these compositions (Al63.25Cu24.5Fe12.25, Al64Cu24Fe12, Al63Cu25Fe12).

引用

页码：1823 / 1836

页数：14

共 21 条

[1] AUDIER M, 1989, P ANNIVERSARY ADRATI, P74
[2] DYNAMICAL PHASONS IN A PERFECT QUASICRYSTAL
BANCEL, PA
[J]. PHYSICAL REVIEW LETTERS, 1989, 63 (25) : 2741 - 2744
[3] Bradley AJ, 1939, J I MET, V65, P389
[4] Indexing of icosahedral quasiperiodic crystals
Cahn, John W.
Shechtman, Dan
Gratias, Denis
[J]. JOURNAL OF MATERIALS RESEARCH, 1986, 1 (01) : 13 - 26
[5] ICOSAHEDRAL ALCUFE ALLOYS - TOWARDS IDEAL QUASI-CRYSTALS
CALVAYRAC, Y
QUIVY, A
BESSIERE, M
LEFEBVRE, S
CORNIERQUIQUANDON, M
GRATIAS, D
[J]. JOURNAL DE PHYSIQUE, 1990, 51 (05): : 417 - 431
[6] THE NATURE OF THE TOPOLOGICAL DISORDER IN THE RAPIDLY QUENCHED AL73MN21SI6 ICOSAHEDRAL PHASE
CALVAYRAC, Y
DEVAUDRZEPSKI, J
BESSIERE, M
LEFEBVRE, S
QUIVY, A
GRATIAS, D
[J]. PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 1989, 59 (04): : 439 - 450
[7] CORNIERQUIQUAND.M, 1991, INT WORKSHOP METHODS
[8] CORNIERQUIQUAND.M, UNPUB
[9] X-RAY AND TEM STUDIES OF AL-FE-CU DODECAHEDRAL PARTICLES - CHARACTERIZATION OF THEIR MICROCRYSTALLINE STATE OF PSEUDO-ICOSAHEDRAL SYMMETRY
DENOYER, F
HEGER, G
LAMBERT, M
AUDIER, M
GUYOT, P
[J]. JOURNAL DE PHYSIQUE, 1990, 51 (07): : 651 - 660
[10] DUBOIS JM, 1991, IN PRESS PHASE TRANS, V32

← 1 2 3 →