کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1589009 1515162 2013 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Non-centro-symmetric electron diffraction pattern of icosahedral quasicrystal induced by combination of linear phason strain and curvature of Ewald sphere
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Non-centro-symmetric electron diffraction pattern of icosahedral quasicrystal induced by combination of linear phason strain and curvature of Ewald sphere
چکیده انگلیسی


• Diffraction patterns present no centro-symmetry.
• Linear phason strain and curvature of Ewald sphere cause non-centro-symmetry.
• It represents an alternative origin of the non-centro-symmetry in the EDPs.

Non-centro-symmetric characteristics are observed in the experimental electron diffraction patterns (EDPs) from the icosahedral quasicrystalline precipitates in ZrAlNiCuNb alloys. Different from the well-known breaking of the Friedel's law, where a strong dynamical effect will reveal in EDPs the concealed non-centro-symmetry originated from the crystal structures themselves, the current results can be interpreted in terms of changes in deviation parameters due to a delicate combination of the linear phason strain characteristic of quasicrystals and the curvature of Ewald sphere. After taking this effect into consideration, the corresponding simulated EDPs fit quite well to the experimental data.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Micron - Volumes 52–53, September–October 2013, Pages 45–48
نویسندگان
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