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Shock Synthesis of Five-component Icosahedral Quasicrystals

Oppenheim, Julius and Ma, Chi and Hu, Jinping and Bindi, Luca and Steinhardt, Paul J. and Asimow, Paul D. (2017) Shock Synthesis of Five-component Icosahedral Quasicrystals. Scientific Reports, 7 . Art. No. 15629. ISSN 2045-2322. PMCID PMC5688125.

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Five-component icosahedral quasicrystals with compositions in the range Al_(68–73)Fe_(11–16)Cu_(10–12)Cr_(1–4)Ni_(1–2) were recently recovered after shocking metallic CuAl_5 and (Mg_(0.75)Fe_(0.25))_2SiO_4 olivine in a stainless steel 304 chamber, intended to replicate a natural shock that affected the Khatyrka meteorite. The iron in those quasicrystals might have originated either from reduction of Fe^(2+) in olivine or from the stainless steel chamber. In this study, we clarify the shock synthesis mechanism of icosahedral quasicrystals through two new shock recovery experiments. When CuAl_5 and Fe^(2+)-bearing olivine were isolated in a Ta capsule, no quasicrystals were found. However, with only metallic starting materials, numerous micron-sized five-component icosahedral quasicrystals, average composition Al_(72)Cu_(12)Fe_(12)Cr_3Ni_1, were found at the interface between CuAl_5 and stainless steel, demonstrating nucleation of quasicrystals under shock without any redox reaction. We present detailed characterization of recovered quasicrystals and discuss possible mechanisms for generating sufficiently high temperatures to reach melting with relatively weak shocks. We discuss the implications of our five-component quasicrystal for the stability of quasicrystals, which have previously only been considered in alloy systems with four or fewer components. Even small amounts of additional metals expand the stability range of the icosahedral phase and facilitate routine syntheses without extraordinary precision in preparation of starting mixtures.

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URLURL TypeDescription CentralArticle
Oppenheim, Julius0000-0002-5988-0677
Ma, Chi0000-0002-1828-7033
Bindi, Luca0000-0003-1168-7306
Asimow, Paul D.0000-0001-6025-8925
Additional Information:© 2017 The Authors. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit Received: 06 July 2017; Accepted: 01 November 2017; Published online: 15 November 2017. JO was supported by Dr. George R. Rossman Summer Undergraduate Research Fellowship. The Caltech Lindhurst Laboratory of Experimental Geophysics and its staff members M. J. Burns and R. Oliver are supported by the National Science Foundation through award EAR-1426526. JH is supported by a grant from the Caltech/JPL President and Director’s Fund. We gratefully acknowledge support and infrastructure provided for this work by the Kavli Nanoscience Institute at Caltech. The Caltech GPS Division Analytical Facility is supported, in part, by NSF Grants EAR-0318518 and DMR-0080065. Author Contributions: J.O. and P.D.A. conceived and executed the experiments. J.O., J.H., and C.M. analyzed the run products. J.O., J.H., and P.D.A. wrote the manuscript and all co-authors edited the manuscript. The authors declare that they have no competing interests.
Group:Kavli Nanoscience Institute
Funding AgencyGrant Number
Caltech Summer Undergraduate Research Fellowship (SURF)UNSPECIFIED
JPL President and Director’s FundUNSPECIFIED
PubMed Central ID:PMC5688125
Record Number:CaltechAUTHORS:20171115-105645635
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:83225
Deposited By: Tony Diaz
Deposited On:15 Nov 2017 21:51
Last Modified:15 Apr 2020 00:23

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