Compression Freezing Kinetics of Water to Ice VII

Gleason, A. E.; Bolme, Cynthia; Galtier, Eric; Lee, H. J.; Granados, Eduardo; Dolan, Daniel H.; Seagle, Christopher T; Ao, Tommy; Ali, Suzanne; Lazicki, Amy; Swift, Damian; Celliers, P. M.; Mao, Wendy L.

doi:10.1103/physrevlett.119.025701

Cited by 65 publications

(43 citation statements)

References 38 publications

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“…The pressure relief already occurs before the material hardness (0.5 GPa) has been reached. Finally, we note that the high pressures only act for times of a few tens of picoseconds; this time is insufficient for inducing phase transformations to high-pressure ice allotropes (Gleason et al, 2017).…”

Section: Resultsmentioning

confidence: 88%

Collision‐Induced Melting in Collisions of Water Ice Nanograins: Strong Deformations and Prevention of Bouncing

Nietiadi

Umstätter

Alhafez

et al. 2017

Geophysical Research Letters

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Collisions between ice grains are ubiquitous in the outer solar system. The mechanics of such collisions is traditionally described by the elastic contact theory of adhesive spheres. Here we use molecular dynamics simulations to study collisions between nanometer-sized amorphous water ice grains. We demonstrate that the collision-induced heating leads to grain melting in the interface of the colliding grains. The large lateral deformations and grain sticking induced considerably modify available macroscopic collision models. We report on systematic increases of the contact radius, strong grain deformations, and the prevention of grain bouncing.

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Section: Resultsmentioning

confidence: 88%

Collision‐Induced Melting in Collisions of Water Ice Nanograins: Strong Deformations and Prevention of Bouncing

Nietiadi

Umstätter

Alhafez

et al. 2017

Geophysical Research Letters

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“…2 , gray curve), consistent with previous work (e.g., ref. 19 ). For each peak pressure set, 33.6 ± 5.0, 18.9 ± 3.0, 7.6 ± 1.2, and 4.7 ± 0.8 GPa, XRD patterns are collected on release (i.e., at time delays greater than ~11 ns), Fig.…”

Section: Resultsmentioning

confidence: 99%

Time-resolved diffraction of shock-released SiO2 and diaplectic glass formation

et al. 2017

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Understanding how rock-forming minerals transform under shock loading is critical for modeling collisions between planetary bodies, interpreting the significance of shock features in minerals and for using them as diagnostic indicators of impact conditions, such as shock pressure. To date, our understanding of the formation processes experienced by shocked materials is based exclusively on ex situ analyses of recovered samples. Formation mechanisms and origins of commonly observed mesoscale material features, such as diaplectic (i.e., shocked) glass, remain therefore controversial and unresolvable. Here we show in situ pump-probe X-ray diffraction measurements on fused silica crystallizing to stishovite on shock compression and then converting to an amorphous phase on shock release in only 2.4 ns from 33.6 GPa. Recovered glass fragments suggest permanent densification. These observations of real-time diaplectic glass formation attest that it is a back-transformation product of stishovite with implications for revising traditional shock metamorphism stages.

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“…At this low pressure, it is difficult to deeply undercool liquid water [5,6], and so the driving force for freezing is rather limited in magnitude. In contrast, water becomes deeply undercooled (by up to 150 degrees; see Figure 1) and remains as a metastable liquid for less than a microsecond in dynamic compression experiments performed over the past two decades where it is rapidly compressed along a quasi-isentrope to pressures above 1 GPa [7][8][9][10][11][12][13][14]. Some of these experiments have achieved peak pressures of above 6 GPa [10,11,13], and their conclusion is that water freezes almost instantaneously -within a few tens of nanoseconds -if it gets overdriven to this point along the quasi-isentrope.…”

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confidence: 99%

Nanosecond Freezing of Water at High Pressures: Nucleation and Growth near the Metastability Limit

et al. 2018

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The fundamental study of phase transition kinetics has motivated experimental methods toward achieving the largest degree of undercooling possible, more recently culminating in the technique of rapid, quasi-isentropic compression. This approach has been demonstrated to freeze water into the high-pressure ice VII phase on nanosecond time scales, with some experiments undergoing heterogeneous nucleation while others, in apparent contradiction, suggesting a homogeneous nucleation mode. In this study, we show through a combination of theory, simulation, and analysis of experiments that these seemingly contradictory results are in agreement when viewed from the perspective of classical nucleation theory. We find that, perhaps surprisingly, classical nucleation theory is capable of accurately predicting the solidification kinetics of ice VII formation under an extremely high driving force (|∆µ/k B T | ≈ 1), but only if amended by two important considerations: 1) transient nucleation and 2) separate liquid and solid temperatures. This is the first demonstration of a model that is able to reproduce the experimentally observed rapid freezing kinetics.

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Compression Freezing Kinetics of Water to Ice VII

Cited by 65 publications

References 38 publications

Collision‐Induced Melting in Collisions of Water Ice Nanograins: Strong Deformations and Prevention of Bouncing

Collision‐Induced Melting in Collisions of Water Ice Nanograins: Strong Deformations and Prevention of Bouncing

Time-resolved diffraction of shock-released SiO2 and diaplectic glass formation

Nanosecond Freezing of Water at High Pressures: Nucleation and Growth near the Metastability Limit

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