Equation of state, phase stability, and amorphization of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mtext>SnI</mml:mtext></mml:mrow><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>at high pressure and temperature

Grocholski, Brent; Speziale, S.; Jeanloz, Raymond

doi:10.1103/physrevb.81.094101

Cited by 14 publications

(8 citation statements)

References 25 publications

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“…S6. Similar phenomenon has been observed in extreme deformation of brittle materials (23)(24)(25)(26)(27) and takes place during processes such as ball milling (28). The versatility and synergy of deformation mechanisms in HEAs render them as viable candidates for extreme load-bearing applications such as in impact penetration, protection, and extreme cryogenic environments.…”

Section: Resultssupporting

confidence: 58%

Amorphization in extreme deformation of the CrMnFeCoNi high-entropy alloy

et al. 2021

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Ever-harsher service conditions in the future will call for materials with increasing ability to undergo deformation without sustaining damage while retaining high strength. Prime candidates for these conditions are certain high-entropy alloys (HEAs), which have extraordinary work-hardening ability and toughness. By subjecting the equiatomic CrMnFeCoNi HEA to severe plastic deformation through swaging followed by either quasi-static compression or dynamic deformation in shear, we observe a dense structure comprising stacking faults, twins, transformation from the face-centered cubic to the hexagonal close-packed structure, and, of particular note, amorphization. The coordinated propagation of stacking faults and twins along {111} planes generates high-deformation regions, which can reorganize into hexagonal packets; when the defect density in these regions reaches a critical level, they generate islands of amorphous material. These regions can have outstanding mechanical properties, which provide additional strengthening and/or toughening mechanisms to enhance the capability of these alloys to withstand extreme loading conditions.

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Section: Resultssupporting

confidence: 58%

Amorphization in extreme deformation of the CrMnFeCoNi high-entropy alloy

et al. 2021

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“…The metastable melting curve may correspond to a lower pressure bound for the kinetic phase boundary. Alternatively, the amorphous plagioclase may be formed as a stable phase at low temperatures as being suggested by the positive melting slope in SnI 4 which refutes the pseudo‐melting hypothesis [ Grocholski et al , 2010].…”

Section: Discussionmentioning

confidence: 61%

Pressure‐induced amorphization of albitic plagioclase in an externally heated diamond anvil cell

Tomioka

Kondo

Kunikata

et al. 2010

Geophysical Research Letters

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[1] High-pressure and high-temperature experiments of albitic plagioclase up to 41 GPa and 270°C were carried out using an externally heated diamond anvil cell. Raman spectroscopy and transmission electron microscopy of the recovered samples revealed that the amorphization of albite was complete at ∼37 GPa and room temperature. The amorphization pressure at 170°C was nearly the same as that at room temperature. In contrast, the pressure largely decreased to ∼31 GPa at 270°C. In comparison with the amorphization pressure of albite in laboratory shock experiments, that in the present static compression experiments is significantly lower (>10 GPa) even at room temperature. This suggests that shorter pressure duration results in a lower degree of amorphization of plagioclase. The formation of maskelynite in shocked meteorites does not necessarily require the very high shock pressure (30-90 GPa) that was previously estimated on the basis of shock recovery experiments. Citation: Tomioka, N., H. Kondo, A. Kunikata, and T. Nagai (2010), Pressure-induced amorphization of albitic plagioclase in an externally heated diamond anvil cell,

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“…Upon further compression, we noticed a significant feature at 5.8 GPa (= P g ), which was quite different from the solid–solid phase transitions at P 1 and P 2 . This feature signifies the “pressure-driven amorphization from crystal” without polymerization ,− or dissociation, − wherein typical topological frustration is induced with breaking the periodic array of ions. Generally, pressure-induced amorphization in molecular systems occurs accompanying the molecular damages.…”

Section: Results and Discussionmentioning

confidence: 99%

Pressure-Induced Frustration–Frustration Process in 1-Butyl-3-methylimidazolium Hexafluorophosphate, a Room-Temperature Ionic Liquid

Abe¹,

Takekiyo²,

Hatano³

et al. 2014

J. Phys. Chem. B

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We have found that the room-temperature ionic liquid (RTIL) reveals outstanding pressure-induced phase changes from a liquid state to a crystal polymorph and finally to a glass form upon compression by up to 8 GPa. The RTIL is 1-butyl-3-methylimidazolium hexafluorophosphate, [C4mim][PF6], which offers the opportunity to investigate a variety of fluctuations in one system and can be completely recovered without dissociation or polymerization, even after decompression. Similar to charge frustration, spin ice-like frustration, and geometric frustration in high potential spintronics/multiferroic materials, the RTIL frustrations are classified into charge (scalar), orientation (vector), and coordination number (topology). Degrees of freedom at each state of [C4mim][PF6] are described by charge balancing, molecular orientational order/disorder, molecular conformations of the C4mim(+) cation, and the coordination number. Here, we show a novel "conformation glass" induced by high pressure.

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Equation of state, phase stability, and amorphization ofSnI4at high pressure and temperature

Cited by 14 publications

References 25 publications

Amorphization in extreme deformation of the CrMnFeCoNi high-entropy alloy

Amorphization in extreme deformation of the CrMnFeCoNi high-entropy alloy

Pressure‐induced amorphization of albitic plagioclase in an externally heated diamond anvil cell

Pressure-Induced Frustration–Frustration Process in 1-Butyl-3-methylimidazolium Hexafluorophosphate, a Room-Temperature Ionic Liquid

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