DIRECT EVIDENCE FOR PLASTIC-DEFORMATION OF QUASI-CRYSTALS BY MEANS OFA DISLOCATION MECHANISM

Authors
WOLLGARTEN M BEYSS M URBAN K LIEBERTZ H KOSTER U
Citation
M. Wollgarten et al., DIRECT EVIDENCE FOR PLASTIC-DEFORMATION OF QUASI-CRYSTALS BY MEANS OFA DISLOCATION MECHANISM, Physical review letters, 71(4), 1993, pp. 549-552
Citations number
25
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
71
Issue
4
Year of publication
1993
Pages
549 - 552
Database
ISI
SICI code
0031-9007(1993)71:4<549:DEFPOQ>2.0.ZU;2-D
Abstract
Single quasicrystals of Al70Pd21Mn9 were plastically deformed by 25% u nder compression at 750-degrees-C. Both these samples as well as contr ol samples of as-grown and heat-treated material were investigated by transmission electron microscopy. It was found that upon deformation t he dislocation density increases by about 2 orders of magnitude. This provides the first direct evidence for quasicrystal deformation by a d islocation mechanism. The dislocations were found to have twofold and fivefold Burgers vector directions in physical space.