Phason defects in Al-Pd-Mn approximant phases: Another example

被引:0
作者
Beraha, L [1 ]
Duneau, M
机构
[1] Ecole Polytech, Ctr Phys Theor, CNRS, UPR A0014, F-91128 Palaiseau, France
[2] CNRS, Thermodynam & Physicochim Met Lab, UMR 5614, F-38402 St Martin Dheres, France
来源
PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES | 1998年 / 78卷 / 02期
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中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A six-dimensional description is given for two approximants, R and T, of the decagonal Al-Pd-Mn phase. Both structures are shown to be entirely covered by two sorts of overlapping clusters, namely by 'Bergman clusters' and by 'pseudo-Mackay clusters'. On the basis of structural defects observed by high-resolution electron microscopy, a possible structural transformation between these two phases is studied. The mechanism of transformation involves the motion of linear defects which are not dislocations but lines of phasons. The atomic jumps related to the defect motion occur at distances less than 3 Angstrom and are shown to be phason jumps since they follow from translations of the windows (atomic surfaces) in perpendicular space. Moreover experimental observations suggest that the motion of phason defects can also be driven by a chemical composition gradient.
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页码:345 / 372
页数:28
相关论文
共 23 条
[1]  
[Anonymous], LECT QUASICRYSTALS
[2]   ALPDMN PHASE-DIAGRAM IN THE REGION OF QUASI-CRYSTALLINE PHASES [J].
AUDIER, M ;
DURANDCHARRE, M ;
DEBOISSIEU, M .
PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 1993, 68 (05) :607-618
[3]   Correlated phason jumps involved in plastic deformation of Al-Pd-Mn approximant phases [J].
Beraha, L ;
Duneau, M ;
Klein, H ;
Audier, M .
PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1997, 76 (03) :587-613
[4]   Structure of quasicrystalline approximant phase in the Al-Pd-Mn system [J].
Boudard, M ;
Klein, H ;
deBoissieu, M ;
Audier, M ;
Vincent, H .
PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1996, 74 (04) :939-956
[5]   NEUTRON AND X-RAY SINGLE-CRYSTAL STUDY OF THE ALPDMN ICOSAHEDRAL PHASE [J].
BOUDARD, M ;
DEBOISSIEU, M ;
JANOT, C ;
HEGER, G ;
BEELI, C ;
NISSEN, HU ;
VINCENT, H ;
IBBERSON, R ;
AUDIER, M ;
DUBOIS, JM .
JOURNAL OF PHYSICS-CONDENSED MATTER, 1992, 4 (50) :10149-10168
[6]  
BRESSON L, 1993, J NONCRYSTALLINE SOL, V153, P272
[7]   Indexing of icosahedral quasiperiodic crystals [J].
Cahn, John W. ;
Shechtman, Dan ;
Gratias, Denis .
JOURNAL OF MATERIALS RESEARCH, 1986, 1 (01) :13-26
[8]  
Duneau M., 1994, LECT QUASICRYSTALS, P283
[9]   EQUIVALENCE OF THE GENERALIZED GRID AND PROJECTION METHODS FOR THE CONSTRUCTION OF QUASI-PERIODIC TILINGS [J].
GAHLER, F ;
RHYNER, J .
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 1986, 19 (02) :267-277
[10]  
GODECKE T, 1995, Z METALLKD, V86, P109