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Showing 1 to 20 of 24 for “"Supercooled Liquid"”.
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Phase Formation, Liquid Structure, and Physical Properties of Amorphous- and Quasicrystal-forming Alloys
… levitation: BESL), a method for determining supercooled liquid structure and phase formation insitu, was used. Using BESL, the development of structural and chemical inhomogeneity was observed in supercooled liquid Cu46Zr54: a BMG when cast) with an onset at 845 ┬▒ 5┬░C, providing …
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Precipitation growth processes in the comma head region of an east coast winter storm
… aggregation, with no evidence of riming as no supercooled liquid water was observed within this region. In the cloud-top generating cell region, new particle habits were observed within each growth layer along with detectable amounts of supercooled liquid water. Measurements were consistent …
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Development of multi-component iron-based amorphous alloy
… a eutectic point and that stabilisation of the supercooled liquid was caused by competition for nucleation between austenite and metastable phases, rather than between primary equilibrium solidification products. Of the ternary compositions where an amorphous phase was produced it was concluded …
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Investigation of the structure of natural orographic clouds embedded within atmospheric river type flow over the Payette Mountains in Idaho
… clouds, knowing the location and amount of supercooled liquid water (SLW) is vital to the success of cloud seeding missions. Past research has shown that updrafts within orographic clouds are required for SLW to be present. Using the WCR observations, supplemented by simulations using the …
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The influence of primary nucleation and rime splintering on ice number concentrations in southern ocean cumuli
… cloud phase studies suggest these clouds contain supercooled liquid water and a lack of ice, which may promote their longevity compared to those produced in GCMs. This study uses two cumulus-sampling research flights from the recent summertime Southern Ocean, Clouds, Radiation, Aerosol Transport …
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Development of a hybrid thermoplastic forming process for the manufacture of multi-facet and curvilinear surgical blades from bulk metallic glass
… exhibit softening behavior and transitions to a supercooled liquid regime. This supercooled state allows the use of economically-viable thermoplastic forming techniques that are typically not available to metals and other hard materials. BMG has therefore been identified as an alternative …
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Optical study of shear and longitudinal acoustic waves and complex relaxation dynamics of glass forming liquids
… structural relaxation dynamics of glass forming liquids, allowing both empirical modeling and testing of the predictions of the mode-coupling theory (MCT). Longitudinal and shear acoustic waves throughout much of the MHz frequency range, time-dependent thermal expansion on nanosecond and …
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Higher Order Structure in the Energy Landscapes of Model Glass Formers
The study of supercooled liquids and glasses remains one of the most divisive and divided fields in modern physics. Despite a vast amount of effort and research time invested in this topic, the answers to many central questions remain disputed and incomplete. However, the link between the behaviour …
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Studies of Structural and Chemical Ordering in Metallic Liquids and Glasses Using Electrostatic Levitation
… and the formation of metallic glass from the supercooled liquid state. Knowledge of the relationship between the liquid's structure and its thermophysical and kinetic properties provide insight into why some metallic alloy liquids form glasses more easily than others. Such structure and …
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Predicting the Hydration Free Energy of Small Alkanes and Alcohols from Custom, Electronic Structure-Based Force Fields
… chemical systems. </p> <p>Simulations of bulk, supercooled, liquid water using a model based solely on QM data predict an exponential rise in the surface tension with increased supercooling, supporting the existence of a highly debated second phase of liquid water. </p> <p>A new method for …
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Development of temperature and feed rate controllers for a hybrid thermoplastic forming of surgical blades from bulk metallic glass
… transition temperature, BMG transitions to a supercooled liquid regime, so that thermoplastic forming process can be applied. BMG has therefore been identified as an alternative material for precision surgical blades with the potential of tremendous cost savings. Zhu [8] has recently developed …
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Optical characterization of complex mechanical and thermal transport properties
… of freedom linked to structural relaxation in supercooled liquids. In ISS measurements, short optical pulses are crossed to produce a periodic excitation profile in or at the surface of the sample. Light from a probe beam that diffracts off the periodic material response is monitored to observe …
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Toward ultra-broadband photoacoustic spectroscopy of supercooled liquids
… slow-down of structural relaxation dynamics in supercooled liquids leading to the glass transition is limited in part by the lack of data in these systems. Between the melting point and the glass transition, the viscosity of supercooled liquids can change by 16 orders of magnitude or more and …
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Hailfall in a future climate using a pseudo-global warming approach
… resulting in less competition for available supercooled liquid water and thus larger hail sizes. Because larger hailstones are less susceptible to melting, despite increased melting depths, the area of hailfall at the surface increased in future cold-season storms compared to the historical …
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Development of mechano-active organic materials for shock wave energy dissipation
… collapse. In chapter 5, we describe a metastable supercooled liquid, i.e. 1,2-bis(phenylethynyl)benzene, that undergoes accelerated nucleation from its supercooled state when exposed to shock waves. Various analysis techniques are utilized to build an understanding of shock-induced nucleation and …
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Surface glassy dynamics and single-molecule absorption of quantum dots detected by scanning tunneling microscopy
… hopping. At sufficient low temperature in the supercooled liquid regime, glass dynamics is split into two modes of relaxation, primary α-relaxation which is responsible for the glass transition and secondary β-relaxation which is thought to be the precursor of the α -relaxation. In the glassy …
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Investigation of rare events and slow dynamics in atomic and molecular liquids and glasses using ascent dynamics
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-12-01
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The Role of Nuclear Quantum Effects in Supercooled Water and Amorphous Ice
… water behaves much differently than other liquids. For example, water shows an anomalous density maximum at 277 K, the solid phase (ice) is less denser than the liquid, and its thermodynamic response functions, such as the specific heat C<sub>P</sub> and isothermal compressibility …
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Hailstorm events over a maritime tropical region: a study of environments and microphysics of Surabaya hail events, Indonesia
… to the 0°C isotherm encompasses the region where supercooled liquid water content (SLWC) is maximized—typically concentrated near the –5°C isotherm. NetCAPE0C also controls the updraft width and depth, especially in the earlier stages of storm development, where larger values promote quicker …
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Direct energy landscape sampling of the homogeneous nucleation and crystal growth of a model liquid
… potential-energy landscape of a monotonic, model-liquid Argon system. The algorithm biases the system to evolve from a liquid-like structure towards an FCC crystal structure through inherent structures. Compared to other computational techniques, our method requires no assumptions about the shape, …
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