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Shock synthesis of Al-Fe-Cr-Cu-Ni icosahedral quasicrystal

Hu, Jinping and Asimow, Paul D. and Ma, Chi (2020) Shock synthesis of Al-Fe-Cr-Cu-Ni icosahedral quasicrystal. In: Shock Compression of Condensed Matter - 2019. AIP Conference Proceedings. No.2272. American Institute of Physics , Melville, NY, Art. No. 100013. ISBN 978-0-7354-4000-5.

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Al-alloy quasicrystals (QC) are of great interest because of their unique physical properties and natural occurrence in a meteorite. Considerable effort has been invested to explore the compositional fields of stable QC and quenchable metastable QC. In this light, shock recovery experiments, originally aimed at proving the planetary impact origin of natural quasicrystalline phases, also offer a novel strategy for synthesizing novel QC compositions and exploring expanded regions of the QC stability field. In this study, we shocked an Al-Cu-W graded density target (originally manufactured for use as a ramp-generating impactor but here used as target) to sample interactions between 304 stainless steel and the full range of Al/Cu starting ratios. This experiment synthesized an icosahedral quasicrystal of new composition Al₆₈Fe₂₀Cr₆Cu₄Ni₂. No previous reports of Al-Fe-Cr QCs have reached such high Fe/Cr ratio or low Al content. The Cr+Ni content is at the upper bound of this low-Cu quinary icosahedral QC according the Hume-Rothery rules for stability. Our synthesis suggests that the presence of Cu promotes the incorporation of Cr+Ni in the Al-rich icosahedral QC phase, enabling the high Fe/Cr ratio observed.

Item Type:Book Section
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Asimow, Paul D.0000-0001-6025-8925
Ma, Chi0000-0002-1828-7033
Additional Information:© 2020 Author(s). Published by AIP Publishing. Published Online: 04 November 2020. We thank NASA Solar System Workings grant 80NSSC18K0532 for supporting this research. The Lindhurst Laboratory for Experimental Geophysics at Caltech is also supported by NSF awards EAR-1725349 and 1829277. We gratefully thank Jeff Nguyen from LLNL for providing the GDI. Constructive comments from the anonymous reviewer are appreciated.
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Series Name:AIP Conference Proceedings
Issue or Number:2272
Record Number:CaltechAUTHORS:20201105-130517528
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:106452
Deposited By: Tony Diaz
Deposited On:05 Nov 2020 21:16
Last Modified:02 Feb 2022 18:36

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