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首页> 外文期刊>Philosophical Magazine Letters >Study of plastically deformed icosahedral Al-Pd-Mn single quasicrystals by transmission electron microscopy
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Study of plastically deformed icosahedral Al-Pd-Mn single quasicrystals by transmission electron microscopy

机译：透射电子显微镜研究塑性变形二十面体Al-Pd-Mn单准晶体

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Al-Pd-Mn single-quasicrystals have been plastically deformed at temperatures between 730 and 800°C up to different strain values and analysed in the transmission electron microscope. Dislocations were created during deformation. The dislocation density ranged between 1 -7 X 107 cm -2 in undeformed samples and 7-8 X ] 08 cm -2 in material deformed at 732°C. Six-dimensional dislocation Burgers vectors were determined employing the convergent-beam electron diffraction technique. 87% of these Burgers vectors were oriented parallel to twofold directions in three-dimensional physical space. Their moduli were 0-113, 0-183 and 0-296nm. The ratio of the phason to the phonon component of the Burgers vectors was found to increase with increasing strain. A variety of slip systems was observed. In most cases the respective slip plane normals were parallel to fivefold and threefold directions.
机译：Al-Pd-Mn单准晶体已在730至800°C的温度下发生塑性变形，直至达到不同的应变值，并在透射电子显微镜中进行了分析。在变形过程中产生了位错。在未变形的样品中，位错密度在1 -7 X 107 cm -2和在732℃变形的材料中为7-8 X×08 cm -2。使用会聚束电子衍射技术确定六维位错Burgers向量。这些Burgers向量中有87％在三维物理空间中平行于两倍方向定向。它们的模量为0-113、0-183和0-196nm。发现，Burgers载体的声子与声子分量之比随应变增加而增加。观察到各种滑动系统。在大多数情况下，各自的滑动平面法线平行于五重和三重方向。

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