کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8017720 | 1517227 | 2015 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
X-ray diffraction study of the icosahedral AlCuFe quasicrystal at megabar pressures
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We report in-situ synchrotron X-ray diffraction study of icosahedral (i)-AlCuFe quasicrystal (QC) at high pressure up to 104Â GPa under ambient temperature using the diamond anvil technique. With compression, there is no obvious change of the diffraction pattern within the measured pressure range. Five characteristic peaks from the i-AlCuFe QC maintain up to 104Â GPa. The unit cell volume of the i-AlCuFe QC decreases monotonously until 72Â GPa. The experimental P-V compression curve below 72Â GPa was fitted to the Birch-Murnaghan equation of state with V0=2023(19)Â Ã
3, K0=131(7)Â GPa, Kâ²=4.0 (fixed). The resulting EoS parameters are approximately consistent with those observed in previous study. A discontinuous volume change is observed between 72 and 75Â GPa. These observed results indicate a phase transition from i-AlCuFe QC to an approximant crystal (AC) which has a similar local atomic arrangement as the QC. This study suggests that i-AlCuFe QC maintains its structure at least up to 72Â GPa and then transforms to AC with small displacement of atoms.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 161, 15 December 2015, Pages 13-16
Journal: Materials Letters - Volume 161, 15 December 2015, Pages 13-16
نویسندگان
Sota Takagi, Atsushi Kyono, Saki Mitani, Neo Sugano, Yuki Nakamoto, Naohisa Hirao,