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

被引：194

作者：

WOLLGARTEN, M ^{[1
]}

BEYSS, M ^{[1
]}

URBAN, K ^{[1
]}

LIEBERTZ, H ^{[1
]}

KOSTER, U ^{[1
]}

机构：

[1] UNIV DORTMUND,FACHBEREICH CHEMIETECHN,D-44221 DORTMUND,GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.71.549

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Single quasicrystals of Al70Pd21Mn9 were plastically deformed by 25% under compression at 750-degrees-C. Both these samples as well as control samples of as-grown and heat-treated material were investigated by transmission electron microscopy. It was found that upon deformation the dislocation density increases by about 2 orders of magnitude. This provides the first direct evidence for quasicrystal deformation by a dislocation mechanism. The dislocations were found to have twofold and fivefold Burgers vector directions in physical space.

引用

页码：549 / 552

页数：4

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