Diffusion of 57Co in decagonal Al-Ni-Co-quasicrystals

被引：17

作者：

Khoukaz, C

Galler, R

Mehrer, H

Canfield, PC

Fisher, IR

Feuerbacher, M

机构：

[1] Univ Munster, Inst Met Forsch, D-48149 Munster, Germany

[2] Iowa State Univ, Ames Lab, Ames, IA 50011 USA

[3] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

[4] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2000年 / 294卷

关键词：

diffusion; decagonal Al-Ni-Co; radiotracer method; anisotropy of diffusion;

D O I：

10.1016/S0921-5093(00)01149-7

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Self-diffusion of Co-57 in decagonal Al-Ni-Co single quasicrystals was studied for both principal directions as a function of the temperature by means of the radiotracer method. In combination with serial sectioning, diffusivities were measured over a large temperature range from 732 to 1273 K. Below about 1120 K diffusion is described by an Arrhenius behaviour along both the periodic and the quasiperiodic directions. The magnitude of the activation enthalpies and pre-exponential factors support a vacancy-type diffusion mechanism. A small anisotropy of diffusion which is temperature-dependent but never exceeds 30% was detected. Above 1120 K, a kink in the Arrhenius curve is observed. We attribute this behaviour to a phase transition from the decagonal basic Go-rich phase to an ordered modification. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：697 / 701

页数：5

共 26 条

[1] First low-temperature radiotracer studies of diffusion in icosahedral quasicrystals [J].

Bluher, R ;

Scharwaechter, P ;

Frank, W ;

Kronmuller, H .

PHYSICAL REVIEW LETTERS, 1998, 80 (05) :1014-1017

[2] ISOTOPE EFFECT AND SELF-DIFFUSION IN FACE-CENTERED CUBIC COBALT [J].

BUSSMANN, W ;

HERZIG, C ;

REMPP, W ;

MAIER, K ;

MEHRER, H .

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1979, 56 (01) :87-97

[3] SELF-DIFFUSION IN INDIUM [J].

DICKEY, JE .

ACTA METALLURGICA, 1959, 7 (05) :350-353

[4] On the growth of decagonal Al-Ni-Co quasicrystals from the ternary melt [J].

Fisher, IR ;

Kramer, MJ ;

Islam, Z ;

Ross, AR ;

Kracher, A ;

Wiener, T ;

Sailer, MJ ;

Goldman, AI ;

Canfield, PC .

PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 1999, 79 (03) :425-434

[5] Diffusion in icosahedral Al-Pd-Mn quasicrystals: temperature and pressure dependence [J].

Galler, R ;

Mehrer, H .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2000, 294 :693-696

[6]

GALLER R, 1999, VERHANDLUNGEN DPG, V5, P839

[7] Volume and grain-boundary self-diffusion of Fe in Al-Cu-Fe icosahedral quasicrystals [J].

Joulaud, JL ;

Bernardini, J ;

Gas, P ;

Bergman, C ;

Dubois, JM ;

Calvayrac, Y ;

Gratias, D .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1997, 75 (05) :1287-1297

[8] A MECHANISM FOR SELF-DIFFUSION IN QUASI-CRYSTALS [J].

KALUGIN, PA ;

KATZ, A .

EUROPHYSICS LETTERS, 1993, 21 (09) :921-926

[9] Positron-annihilation study of icosahedral AlPdMn alloys [J].

Kanazawa, I ;

Hamada, E ;

Saeki, T ;

Sato, K ;

Nakata, M ;

Takeuchi, S ;

Wollgarten, M .

PHYSICAL REVIEW LETTERS, 1997, 79 (12) :2269-2272

[10] Diffusion in metals, quasicrystals, and intermetallic compounds [J].

Mehrer, H ;

Zumkley, T ;

Eggersmann, M ;

Galler, R ;

Salamon, M .

DIFFUSION MECHANISMS IN CRYSTALLINE MATERIALS, 1998, 527 :3-21

← 1 2 3 →