Supercooling
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. Study of Microstructure and Thermal Properties of the Low Melting Bi-In-Sn Eutectic Alloys
Beside their technological importance in soldering, the low melting eutectic alloys based on bismuth and indium have potential for commercial application in the field of phase-change materials (PCMs). In this respect, the knowledge of their microstructure and thermal properties such as melting temperature, latent heat of melting, supercooling tendency, therm
Mat. Res.. Publicado em: 11/10/2018
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2. Fracture Toughness (K1C) evaluation for dual phase medium carbon low alloy steels using circumferential notched tensile (CNT) specimens
The fracture behavior of dual phase medium carbon low alloy steels produced using two different chemical compositions (A - 0.34C, 0.75Mn, 0.12Cr, 0.13Ni steel and B - 0.3C, 0.97Mn, 0.15Cr steel) was investigated using circumferential notched tensile (CNT) specimens. Intercritical treatments were performed on samples with composition A by 1) austenitizing at
Materials Research. Publicado em: 20/05/2011
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3. Influência do choque térmico nos parâmetros de solidificação dos metais puros / Influence of the thermal shock in the parameters of solidification of pure metals
A produção de fundidos com baixo nível de defeitos e com propriedades mecânicas adequadas é facilmente alcançada com a previsão do comportamento do metal durante a solidificação. A transferência de calor entre o metal-líquido e o molde, nos primeiros instantes de contato, compromete definitivamente as propriedades mecânicas e a qualidade do produ
Publicado em: 2009
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4. SUPER-RESFRIAMENTO DA ÁGUA EM CÁPSULAS CILÍNDRICAS: PARÂMETROS DE INFLUÊNCIA / SUPERCOOLING OF THE WATER IN CYLINDRICAL CAPSULES: PARAMETERS OF INFLUENCE
Um dispositivo experimental foi desenvolvido para o estudo do superresfriamento da água em cápsulas cilíndricas visando sua utilização em processos de termoacumulação. A bancada experimental é constituída basicamente por: seção de teste, sistema de resfriamento, sistema de visualização, sistema de aquisição e armazenamento de dados. A temperat
Publicado em: 2008
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5. Simulation of the solidification of pure nickel via the phase-field method
The Phase-Field method was applied to simulate the solidification of pure nickel dendrites and the results compared with those predicted by the solidification theory and with experimental data reported in the literature. The model's behavior was tested with respect to some initial and boundary conditions. For an initial condition without supercooling, the sm
Materials Research. Publicado em: 2006-12
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6. ESTUDO EXPERIMENTAL DO SUPER-RESFRIAMENTO DA ÁGUA EM CÁPSULAS CILÍNDRICAS / EXPERIMENTAL STUDY OF SUPERCOOLING WATER IN CYLINDRICAL CAPSULES APPLIED TO THE THERMAL STORAGE
Um dispositivo experimental foi desenvolvido para o estudo do super-resfriamento da água em cápsulas cilíndricas visando sua utilização em processos de termo-acumulação. A bancada experimental é constituída basicamente por: seção de teste, sistema de resfriamento, sistema de visualização e sistema de aquisição e armazenamento de dados. A tempe
Publicado em: 2004
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7. Supercooling Characteristics of Isolated Peach Flower Bud Primordia 1
The amount of unfrozen water in dormant peach (Prunus persica [L.] Batsch, cv Redhaven) flower buds, isolated primordia, and bud axes was determined during freezing using pulse nuclear magnetic resonance methods. Differential thermal analysis studies were conducted on whole buds and isolated primordia in the presence of ice nucleation. The results showed tha
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8. Phylogenetic Analyses in Cornus Substantiate Ancestry of Xylem Supercooling Freezing Behavior and Reveal Lineage of Desiccation Related Proteins
The response of woody plant tissues to freezing temperature has evolved into two distinct behaviors: an avoidance strategy, in which intracellular water supercools, and a freeze-tolerance strategy, where cells tolerate the loss of water to extracellular ice. Although both strategies involve extracellular ice formation, supercooling cells are thought to resis
American Society of Plant Biologists.
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9. Xylem Ray Parenchyma Cells in Boreal Hardwood Species Respond to Subfreezing Temperatures by Deep Supercooling That Is Accompanied by Incomplete Desiccation1
It has been accepted that xylem ray parenchyma cells (XRPCs) in hardwood species respond to subfreezing temperatures either by deep supercooling or by extracellular freezing. Present study by cryo-scanning electron microscopy examined the freezing responses of XRPCs in five boreal hardwoods: Salix sachalinensis Fr. Schmit, Populus sieboldii Miq., Betula plat
American Society of Plant Biologists.
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10. Topical Application of Ice-Nucleating-Active Bacteria Decreases Insect Cold Tolerance †
The majority of overwintering insects avoid lethal freezing by lowering the temperature at which ice spontaneously nucleates within their body fluids. We examined the effect of ice-nucleating-active bacteria on the cold-hardiness of the lady beetle, Hippodamia convergens, a freeze-intolerant species that overwinters by supercooling to ca. −16°C. Topical a
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11. Heat and mass transfer scale-up issues during freeze drying: II. Control and characterization of the degree of supercooling
This study aims to investigate the effect of the ice nucleation temperature on the primary drying process using an ice fog technique for temperature-controlled nucleation. In order to facilitate scale up of the freeze-drying process, this research seeks to find a correlation of the product resistance and the degree of supercooling with the specific surface a
Springer-Verlag.
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12. Supercooling in Overwintering Azalea Flower Buds 1
Differential thermal analysis and nuclear magnetic resonance spectroscopy experiments on whole flower buds and excised floral primordia of azalea (Rhododendron kosterianum, Schneid.) proved that supercooling is the mode of freezing resistance (avoidance) of azalea flower primordia. Increase in the linewidth of nuclear magnetic resonance spectra for water upo