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Misawa M, Ryuo E, Yoshida K, Kalia RK, Nakano A, Nishiyama N, Shimojo F, Vashishta P, Wakai F. Picosecond amorphization of SiO 2 stishovite under tension. SCIENCE ADVANCES 2017; 3:e1602339. [PMID: 28508056 PMCID: PMC5429036 DOI: 10.1126/sciadv.1602339] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Accepted: 03/13/2017] [Indexed: 06/07/2023]
Abstract
It is extremely difficult to realize two conflicting properties-high hardness and toughness-in one material. Nano-polycrystalline stishovite, recently synthesized from Earth-abundant silica glass, proved to be a super-hard, ultra-tough material, which could provide sustainable supply of high-performance ceramics. Our quantum molecular dynamics simulations show that stishovite amorphizes rapidly on the order of picosecond under tension in front of a crack tip. We find a displacive amorphization mechanism that only involves short-distance collective motions of atoms, thereby facilitating the rapid transformation. The two-step amorphization pathway involves an intermediate state akin to experimentally suggested "high-density glass polymorphs" before eventually transforming to normal glass. The rapid amorphization can catch up with, screen, and self-heal a fast-moving crack. This new concept of fast amorphization toughening likely operates in other pressure-synthesized hard solids.
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Affiliation(s)
- Masaaki Misawa
- Collaboratory for Advanced Computing and Simulations, Department of Physics and Astronomy, Department of Computer Science, Department of Chemical Engineering and Materials Science, and Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089–0242, USA
- Department of Physics, Kumamoto University, Kumamoto 860-8555, Japan
| | - Emina Ryuo
- Department of Physics, Kumamoto University, Kumamoto 860-8555, Japan
| | - Kimiko Yoshida
- Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori, Yokohama 226-8503, Japan
| | - Rajiv K. Kalia
- Collaboratory for Advanced Computing and Simulations, Department of Physics and Astronomy, Department of Computer Science, Department of Chemical Engineering and Materials Science, and Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089–0242, USA
| | - Aiichiro Nakano
- Collaboratory for Advanced Computing and Simulations, Department of Physics and Astronomy, Department of Computer Science, Department of Chemical Engineering and Materials Science, and Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089–0242, USA
| | | | - Fuyuki Shimojo
- Department of Physics, Kumamoto University, Kumamoto 860-8555, Japan
| | - Priya Vashishta
- Collaboratory for Advanced Computing and Simulations, Department of Physics and Astronomy, Department of Computer Science, Department of Chemical Engineering and Materials Science, and Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089–0242, USA
| | - Fumihiro Wakai
- Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori, Yokohama 226-8503, Japan
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Yoshida K, Wakai F, Nishiyama N, Sekine R, Shinoda Y, Akatsu T, Nagoshi T, Sone M. Large increase in fracture resistance of stishovite with crack extension less than one micrometer. Sci Rep 2015; 5:10993. [PMID: 26051871 PMCID: PMC4458880 DOI: 10.1038/srep10993] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Accepted: 05/11/2015] [Indexed: 11/20/2022] Open
Abstract
The development of strong, tough, and damage-tolerant ceramics requires nano/microstructure design to utilize toughening mechanisms operating at different length scales. The toughening mechanisms so far known are effective in micro-scale, then, they require the crack extension of more than a few micrometers to increase the fracture resistance. Here, we developed a micro-mechanical test method using micro-cantilever beam specimens to determine the very early part of resistance-curve of nanocrystalline SiO2 stishovite, which exhibited fracture-induced amorphization. We revealed that this novel toughening mechanism was effective even at length scale of nanometer due to narrow transformation zone width of a few tens of nanometers and large dilatational strain (from 60 to 95%) associated with the transition of crystal to amorphous state. This testing method will be a powerful tool to search for toughening mechanisms that may operate at nanoscale for attaining both reliability and strength of structural materials.
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Affiliation(s)
- Kimiko Yoshida
- Secure Materials Center, Materials and Structures Laboratory, Tokyo Institute of Technology, R3-23 4259 Nagatsuta, Midori, Yokohama, 226-8503, Japan
| | - Fumihiro Wakai
- Secure Materials Center, Materials and Structures Laboratory, Tokyo Institute of Technology, R3-23 4259 Nagatsuta, Midori, Yokohama, 226-8503, Japan
| | - Norimasa Nishiyama
- 1] Deutsches Elektronen-Synchrotron (DESY), Notkestr. 85, 22607 Hamburg, Germany [2] Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Chiyoda, Tokyo 102-0075, Japan
| | - Risako Sekine
- Secure Materials Center, Materials and Structures Laboratory, Tokyo Institute of Technology, R3-23 4259 Nagatsuta, Midori, Yokohama, 226-8503, Japan
| | - Yutaka Shinoda
- Secure Materials Center, Materials and Structures Laboratory, Tokyo Institute of Technology, R3-23 4259 Nagatsuta, Midori, Yokohama, 226-8503, Japan
| | - Takashi Akatsu
- Secure Materials Center, Materials and Structures Laboratory, Tokyo Institute of Technology, R3-23 4259 Nagatsuta, Midori, Yokohama, 226-8503, Japan
| | - Takashi Nagoshi
- Precision and Intelligence Laboratory, Tokyo Institute of Technology, R2-35 4259 Nagatsuta, Midori, Yokohama, 226-8503, Japan
| | - Masato Sone
- Precision and Intelligence Laboratory, Tokyo Institute of Technology, R2-35 4259 Nagatsuta, Midori, Yokohama, 226-8503, Japan
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Kalkan B, Edwards TG, Raoux S, Sen S. Nature of metastable amorphous-to-crystalline reversible phase transformations in GaSb. J Chem Phys 2013; 139:084507. [DOI: 10.1063/1.4818805] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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McMillan PF, Greaves GN, Wilson M, Wilding MC, Daisenberger D. Polyamorphism and Liquid-Liquid Phase Transitions in Amorphous Silicon and Supercooled Al 2O 3-Y 2O 3Liquids. LIQUID POLYMORPHISM 2013. [DOI: 10.1002/9781118540350.ch12] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Rao R, Sakuntala T, Shaikh A, Deb S. High pressure behavior of α-NaVO3: A Raman scattering study. J SOLID STATE CHEM 2007. [DOI: 10.1016/j.jssc.2007.07.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Greaves GN, Meneau F, Sapelkin A, Colyer LM, ap Gwynn I, Wade S, Sankar G. The rheology of collapsing zeolites amorphized by temperature and pressure. NATURE MATERIALS 2003; 2:622-629. [PMID: 12942072 DOI: 10.1038/nmat963] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2003] [Accepted: 07/24/2003] [Indexed: 05/24/2023]
Abstract
Low-density zeolites collapse to the rigid amorphous state at temperatures that are well below the melting points of crystals of the same composition but of conventional density. Here we show, by using a range of experimental techniques, how the phenomenon of amorphization is time dependent, and how the dynamics of order-disorder transitions in zeolites under temperature and pressure are equivalent. As a result, thermobaric regions of instability can be charted, which are indicative of polyamorphism. Moreover, the boundaries of these zones depend on the rate at which temperature or pressure is ramped. By directly comparing the rheology of collapse with structural relaxation in equivalent melts, we conclude that zeolites amorphize like very strong liquids and, if compression occurs slowly, this is likely to lead to the synthesis of perfect glasses.
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Affiliation(s)
- G N Greaves
- Institute of Mathematical and Physical Sciences, University of Wales, Aberystwyth SY23 3BZ, UK.
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Sciortino F, Essmann U, Stanley HE, Hemmati M, Shao J, Wolf GH, Angell CA. Crystal stability limits at positive and negative pressures, and crystal-to-glass transitions. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 1995; 52:6484-6491. [PMID: 9964167 DOI: 10.1103/physreve.52.6484] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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