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Journal articles on the topic 'Crystallization onset time'

Author: Grafiati
Published: 4 June 2021
Last updated: 2 February 2022

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1

Davoodi, E., M. Hasan, S. Rana, and G. Kumar. "Effect of loading rate on crystallization of metallic glass supercooled liquids." American Journal of Physical Sciences and Applications 1, no. 3 (July 1, 2020): 18–21. http://dx.doi.org/10.15864/ajps.1303.

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Metallic glasses exhibit unique thermoplastic processing capability, which is enabled by their metastable supercooled liquid state below the crystallization temperature. The thermoplastic processing critically depends on the crystallization time (processing time window), temperature (viscosity), applied load, and strain-rate. Among these parameters, the effects of crystallization time and processing temperature have been extensively studied. However, the effects of load and loading rate have not been thoroughly investigated. In this work, we performed a systematic study of load on the supercoo
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2

Tkatch, V. I., S. V. Vasiliev, and K. A. Svyrydova. "Identification of the onset crystallization time in metallic glasses at isothermal conditions." Journal of Non-Crystalline Solids 463 (May 2017): 102–7. http://dx.doi.org/10.1016/j.jnoncrysol.2017.03.008.

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3

Boudjemline, Attia, David T. Clarke, Neville J. Freeman, James M. Nicholson, and Gareth R. Jones. "Early stages of protein crystallization as revealed by emerging optical waveguide technology." Journal of Applied Crystallography 41, no. 3 (April 8, 2008): 523–30. http://dx.doi.org/10.1107/s0021889808005098.

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A highly sensitive method for studying the onset of protein crystallization in real time using an optical-waveguide-based technique is reported. Dual polarization interferometry uses light from sensing and reference waveguides to produce an interference pattern, which when the sensing waveguide is immersed in a protein solution supplies information on the thickness and density of any protein adlayer on the sensing waveguide's surface. This technique provides evidence that crystallization proceedsvialarge protein aggregates but, more strikingly, shows dramatic light loss from the sensing wavegu
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4

D´Eramo, F. J., J. J. Esteban, M. Demartis, E. Aragón, J. E. Coniglio, and L. P. Pinotti. "Time lag between metamorphism and crystallization of anatectic granites (Córdoba, Argentina)." Geologica Acta 18 (November 2, 2020): 1–14. http://dx.doi.org/10.1344/geologicaacta2020.18.17.

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SHRIMP and LA-ICP-MS analyses carried out on zircons from the Río de los Sauces granite revealed their metamorphic and igneous nature. The metamorphic zircons yielded an age of 537±4.8 (2σ)Ma that probably predates the onset of the anatexis during the Pampean orogeny. By contrast, the igneous zircons yielded a younger age of 529±6 (2σ)Ma and reflected its crystallization age. These data point to a short time lag of ca. 8Myr between the High Temperature (HT) metamorphic peak and the subsequent crystallization age of the granite. Concordia age of 534±3.8 (2σ)Ma, for both types of zircon populati
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5

Simmance, Kerry, Wouter van Beek, and Gopinathan Sankar. "Time resolved in situ X-ray diffraction study of crystallisation processes of large pore nanoporous aluminophosphate materials." Faraday Discussions 177 (2015): 237–47. http://dx.doi.org/10.1039/c4fd00179f.

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Time resolved high-resolution X-ray powder diffraction was utilized to obtain detailed changes in the crystal structure parameters during the hydrothermal crystallization process of the nanoporous aluminophosphate AlPO-5 (AFI) structure. This in situ study offered not only the influence of metal ions on the onset of crystallization and estimation of the activation energy of the process, but also allowed us to determine in detail the changes in lattice parameters during this process. More importantly the time-resolved study clearly showed the lattice expansion in the divalent metal ions substit
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6

Misyura, S. Y., and V. S. Morozov. "Nonisothermal desorption of droplets of LiBr salt solution on a heated wall." MATEC Web of Conferences 194 (2018): 01040. http://dx.doi.org/10.1051/matecconf/201819401040.

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Nonisothermal desorption and crystallization of droplets of aqueous salts solution of H2O/LiBr were studied experimentally. A droplet was placed on a horizontal heated wall. The initial concentration of salt C0 varied within 0-53 %. The wall temperature Tw varied within 80 - 235 °C and ambient air pressure was 1 bar. It was shown that the desorption time t1 decreases sharply with increasing Tw and at Tw < 150-160 °C. The desorption time t1 is the time until the onset of crystallization. The desorption time t1 is quasi-constant at Tw > 160 °C and increases with growth in C0.
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7

Lednický, František, and Miroslava Muchová. "Revival of the Induction Time Concept in the Theory of Polymer Crystallization." Collection of Czechoslovak Chemical Communications 58, no. 10 (1993): 2444–50. http://dx.doi.org/10.1135/cccc19932444.

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To monitor early stages of spherulite growth, a microscopical method has been worked out based on the photometrical measurement of the intensity of depolarized light during isothermal crystallization. Application of the technique to polypropylene yields the evidence of existence of nucleation induction time which reflects the processes taking place prior to the onset of spherulite growth, viz. the formation of stable crystal nuclei. Using the method, it is possible to evaluate also systems with a dispersed phase, the interfacial relations being reflected in the induction time of the nucleation
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8

Cai, Yan-Hua, and Yan-Hua Zhang. "The Crystallization, Melting Behavior, and Thermal Stability of Poly(L-lactic acid) Induced byN,N,N′-Tris(benzoyl) Trimesic Acid Hydrazide as an Organic Nucleating Agent." Advances in Materials Science and Engineering 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/843564.

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N,N,N′-Tris(benzoyl) trimesic acid hydrazide (TTAD), as a novel nucleating agent of poly(L-lactic acid) (PLLA), was synthesized and characterized by FT-IR and1H NMR. The crystallization, melting behavior, and thermal stability of PLLA induced by TTAD were investigated through DSC, TGA, depolarized-light intensity measurement, and so forth. The crystallization behavior indicated that the presence of TTAD accelerated the overall PLLA crystallization. Compared to neat PLLA, the crystallization onset temperature of PLLA/1%TTAD increased from 101.36°C to 125.26°C, the melt-crystallization peak temp
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9

Hadinata, Chitiur, Claus Gabriel, Maximilian Ruellmann, Nhol Kao, and Hans-Martin Laun. "Correlation between the gel time and quiescent/quasi-quiescent crystallization onset time of poly(butene-1) as determined from rheological methods." Rheologica Acta 45, no. 5 (November 29, 2005): 631–39. http://dx.doi.org/10.1007/s00397-005-0017-7.

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10

Yan, Zhicheng, Yan Liu, Shaopeng Pan, Yihua Hu, Jing Pang, and Weimin Wang. "The Structural Evolution of Al86Ni9La5 Glassy Ribbons during Milling at Room and Cryogenic Temperatures." Materials 11, no. 10 (October 12, 2018): 1956. http://dx.doi.org/10.3390/ma11101956.

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Melt-spun metallic Al86Ni9La5 glassy ribbons solidified at different circumferential speeds (Sc) were subjected to high-energy ball milling at room and cryogenic temperatures. Crystallization induced by milling was found in the Al86Ni9La5 solidified at lower circumferential speed (Sc = 14.7 m/s), while the Al86Ni9La5 with Sc = 36.6 m/s kept amorphous. Besides, a trend of structural rejuvenation during milling process was observed, as the onset temperatures (Tx1, Tx2) and the crystallization enthalpies (ΔH1, ΔH2) first decreased and then increased along with the milling time. We explored the st
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11

Lowndes, D. H., S. J. Pennycook, G. E. Jellison, S. P. Withrow, and D. N. Mashburn. "Solidification of highly undercooled liquid silicon produced by pulsed laser melting of ion-implanted amorphous silicon: Time-resolved and microstructural studies." Journal of Materials Research 2, no. 5 (October 1987): 648–80. http://dx.doi.org/10.1557/jmr.1987.0648.

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Nanosecond resolution time-resolved visible (632.8 nm) and infrared (1152 nm) reflectivity measurements, together with structural and Z-contrast transmission electron microscope (TEM) imaging, have been used to study pulsed laser melting and subsequent solidification of thick (190–410 nm) amorphous (a) Si layers produced by ion implantation. Melting was initiated using a KrF (248 nm) excimer laser of relatively long [45 ns full width half maximum (FWHM)] pulse duration; the microstructural and time-resolved measurements cover the entire energy density (E1) range from the onset of melting (at ∼
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12

Jeong, H. G., and W. J. Kim. "Hardening by Crystallization During Superplastic Flow in a Powder-metallurgy-processed Zr65Al10Ni10Cu15 Glass Metallic Alloy." Journal of Materials Research 20, no. 6 (June 1, 2005): 1447–55. http://dx.doi.org/10.1557/jmr.2005.0185.

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The superplastic behavior of the Zr65Al10Ni10Cu15 glass metallic alloy produced by the powder metallurgy method was examined in the supercooled liquid region. A tensile elongation as large as 750% was obtained at 6.3 × 10−3 s−1 at 697 K. Large strain hardening took place during the course of deformation and systematic trend was observed in the hardening behavior. Plots of stress versus strain and strain rate versus stress at 697 K showed that Newtonian viscous flow governed the plastic flow until the onset of strain hardening. Microstructure and differential scanning calorimetry analyses as we
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13

CAI, Yan-Hua, and Li-Sha ZHAO. "Heterogeneous Nucleation Effect of N, N'-Adipic Bis(4-phenylbutyric Acid) Dihydrazide on Crystallization Process of Poly(L-lactic Acid)." Materials Science 25, no. 4 (June 27, 2019): 446–54. http://dx.doi.org/10.5755/j01.ms.25.4.20603.

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Enhancing crystallization ability is a fundamental challenges in Poly(L-lactic acid) (PLLA) industry, therefore, the goal of this work was to synthesis a new organic nucleating agent N, N'-adipic bis(4-phenylbutyric acid) dihydrazide (APAD), and investigate its effect on non-isothermal crystallization, isothermal crystallization, melting behavior, thermal stability, and optical property of PLLA. Non-isothermal melt crystallization results showed that APAD acted as more effective nucleating and accelerating agent for the crystallization of PLLA, as a result, upon cooling at 1 °C/min, PLLA/0.5 %
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14

Lindberg, G. P., T. O’Loughlin, N. Gross, A. Reznik, S. Abbaszadeh, K. S. Karim, G. Belev, D. M. Hunter, and B. A. Weinstein. "Raman and AFM mapping studies of photo-induced crystallization in a-Se films: substrate strain and thermal effects." Canadian Journal of Physics 92, no. 7/8 (July 2014): 728–31. http://dx.doi.org/10.1139/cjp-2013-0586.

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Photo-induced crystallization (PC) is studied in amorphous selenium (a-Se) films deposited on glass with and without intermediate layers of indium tin oxide or polymer material. The spatial profile of PC domains is examined by co-localized scanning atomic force microscopy and Raman mapping. We also explore the thermal behavior of the onset and growth of PC in the a-Se films by Raman spectroscopy measurements at temperatures spanning the glass transition (Tg ∼ 313 K). In many films the onset time for PC shows a surprising discontinuity near Tg. Inserting a thin polyimide layer between the a-Se
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15

Embi, Abraham A. "INTRODUCING CRYSTALLIZATION BACKWARD SUCTION TRAPPING LIPIDS AND DEBRIS AS PROPOSED ADDITIONAL FACTOR IN THE GENESIS OF CORONARY ARTERY DISEASE." International Journal of Research -GRANTHAALAYAH 8, no. 9 (October 1, 2020): 215–33. http://dx.doi.org/10.29121/granthaalayah.v8.i9.2020.1174.

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Coronary artery disease progression involves a slow process of abnormal accumulation of lipid deposits to the inner walls of the arteries followed by an immune system response. It is known that an increase in lipid concentration could trigger cholesterol crystals deposition, thus starting a vicious cycle that could also progress into intra-arterial plaque formation, the hallmark of mature atheromas.
 The purpose of this manuscript is to introduce a proposed mechanism for the genesis of coronary artery disease; whereby the actual act of lipids crystallization starts a cycle demonstrated to
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16

Hu, Man Hong, and Yong Hu. "Effect of Cold Rolling on Thermal Stability of Zr 55 Al10Ni5Cu30 Bulk Metallic Glass." Advanced Materials Research 239-242 (May 2011): 490–95. http://dx.doi.org/10.4028/www.scientific.net/amr.239-242.490.

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The effect of cold rolling on thermal stability of bulk Zr55Al10Ni5Cu30metallic glass at room temperature had been investigated by means of X-ray diffractometer, high-resolution transmission electron microscope and differential scanning calorimeter. A number of the cold rolling processes were carried out to obtain different thickness reduction in specimens with the same original size. The XRD patterns of cold rolled specimens with thickness reduction up to 95% showed no clear difference with that of completely amorphous specimens. The relationship of the deformation with the thermal parameters
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17

Fan, G. J., M. X. Quan, Z. Q. Hu, W. Löser, and J. Eckert. "Deformation-induced microstructural changes in Fe40Ni40P14B6 metallic glass." Journal of Materials Research 14, no. 9 (September 1999): 3765–74. http://dx.doi.org/10.1557/jmr.1999.0510.

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The effect of mechanical deformation via high-energy ball milling on the structure of the Fe40Ni40P14B6 metallic glass was studied by means of x-ray diffactometry, transmission electron microscopy (TEM), and differential scanning calorimetry (DSC). After 5 h of milling, TEM observations indicated that some nanocrystallites with a diameter of about 6 nm precipitated from surface layers of the amorphous ribbons, whereas the bulk remained amorphous. When milling time was increased to 11 h, bulk crystallization occurred. The amorphous Fe40Ni40P14B6 alloy crystallized into a mixture of γ–(Fe, Ni) a
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18

Nicula, R., M. Stir, and E. Burkel. "Synchrotron Radiation Investigation of Thermal Stability and Grain-Growth in Pure and Metal-Doped Nanocrystalline TiO2." Materials Science Forum 467-470 (October 2004): 1307–12. http://dx.doi.org/10.4028/www.scientific.net/msf.467-470.1307.

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The crystallization and coarsening of pure and metal-doped (M: Ag, Fe, Co) TiO2 amorphous specimens were studied during in-situ synchrotron radiation diffraction experiments. The temperature and time dependence of the average grain-size of TiO2 anatase and rutile constituent phases was determined. Excess vacancies, secondary phases or solute elements cause the pinning of the grain-boundary motion, control the onset of the anataserutile transition and control the thermal stability of ultrafine microstructures in nanocrystalline TiO2 ceramics.
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19

Zalden, Peter, Florian Quirin, Mathias Schumacher, Jan Siegel, Shuai Wei, Azize Koc, Matthieu Nicoul, et al. "Femtosecond x-ray diffraction reveals a liquid–liquid phase transition in phase-change materials." Science 364, no. 6445 (June 13, 2019): 1062–67. http://dx.doi.org/10.1126/science.aaw1773.

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In phase-change memory devices, a material is cycled between glassy and crystalline states. The highly temperature-dependent kinetics of its crystallization process enables application in memory technology, but the transition has not been resolved on an atomic scale. Using femtosecond x-ray diffraction and ab initio computer simulations, we determined the time-dependent pair-correlation function of phase-change materials throughout the melt-quenching and crystallization process. We found a liquid–liquid phase transition in the phase-change materials Ag4In3Sb67Te26 and Ge15Sb85 at 660 and 610 k
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20

Pal, Mrinal, Aiko Narazaki, Takeshi Sasaki, and Naoto Koshizaki. "Parameter effect on the crystallization of Nd:yttrium aluminum garnet laser-ablated TiO2 thin film." Journal of Materials Research 16, no. 11 (November 2001): 3158–61. http://dx.doi.org/10.1557/jmr.2001.0435.

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Process parameter dependency on the phase transition from anatase to rutile phase of laser-ablated TiO2 films was investigated. Lower ambient argon pressure, longer deposition time, higher laser fluence, and smaller target–substrate separation give rutile phase from anatase phase at comparatively lower temperature. The relationship between thickness and onset temperature of anatase–rutile transformation can be comprehensively explained in terms of film thickness. Thinner films have higher phase transition temperature. The presence of helium gas during deposition favors the anatase–rutile trans
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21

Panine, P., V. Urban, P. Boesecke, and T. Narayanan. "Combined small- and wide-angle X-ray scattering study of early stages of polymer crystallization." Journal of Applied Crystallography 36, no. 4 (July 19, 2003): 991–94. http://dx.doi.org/10.1107/s0021889803008513.

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The early stage of melt crystallization in low-density polyethylene was investigated by simultaneous time-resolved small-angle and wide-angle X-ray scattering (SAXS/WAXS) techniques. The high detectivity of the two-dimensional detectors together with the large photon flux of an undulator source permitted the collection of SAXS and WAXS patterns with nearly single-photon sensitivity and sub-second time resolution. As a result, the crystalline fraction well below 0.001 can be reliably detected and the apparent induction time is considerably reduced (<10 s). The time evolution of both the SAXS
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22

Song, Se Ahn, Wei Zhang, Hong Sik Jeong, Jin Gyu Kim, and Youn Joong Kim. "High-Resolution Dynamic Analysis of the Phase Transformation in Ge2Sb2Te5 Alloy." Advanced Materials Research 26-28 (October 2007): 1199–202. http://dx.doi.org/10.4028/www.scientific.net/amr.26-28.1199.

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Phase transformation and crystal growth behavior of Ge2Sb2Te5 were investigated systematically by means of in situ heating (from room temperature to 500 oC) of amorphous Ge2Sb2Te5 alloy in a high voltage electron microscope with real-time monitoring. Large-scale crystallization occurred to amorphous Ge2Sb2Te5 around 200 oC. Large crystal growth developed on heating from 200 oC to 400 oC, and single crystalline grains grew up to 150 nm. Eventually the onset of partial melting of thin Ge2Sb2Te5 foil was at 500 oC and liquid Ge2Sb2Te5 was observed for the first time by high-resolution transmissio
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23

Lopez, Thomas, and Lorenzo Mangolini. "Crystallization Kinetics of Plasma-Produced Amorphous Silicon Nanoparticles." MRS Proceedings 1536 (2013): 213–18. http://dx.doi.org/10.1557/opl.2013.755.

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ABSTRACTThe use of a continuous flow non-thermal plasma reactor for the formation of silicon nanoparticles has attracted great interest because of the advantageous properties of the process [1]. Despite the short residence time in the plasma (around 10 milliseconds), a significant fraction of the precursor, silane, is converted and collected in the form of nanopowder. The structure of the produced powder can be tuned between amorphous and crystalline by adjusting the power of the radio-frequency excitation source, with higher power leading to the formation of crystalline particles. Numerical m
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24

Qin, Frank G. F., Jian Chao Zhao, Andrew B. Russell, Xiao Dong Chen, John J. Chen, and Lindsay Robertson. "Simulation and experiment of the unsteady heat transport in the onset time of nucleation and crystallization of ice from the subcooled solution." International Journal of Heat and Mass Transfer 46, no. 17 (August 2003): 3221–31. http://dx.doi.org/10.1016/s0017-9310(03)00097-8.

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25

Ippolito, Fabio, Gunter Hübner, Tim Claypole, and Patrick Gane. "Impact of Bimodal Particle Size Distribution Ratio of Functional Calcium Carbonate Filler on Thermal and Flowability Properties of Polyamide 12." Applied Sciences 11, no. 2 (January 11, 2021): 641. http://dx.doi.org/10.3390/app11020641.

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In previous investigations, it was shown that the melting, as well as crystallization behavior of polyamide 12, could be manipulated by adjusting the particle size distribution of calcium carbonate as a functional filler. It was demonstrated that the melt properties of this compound show a significant dependency on the filler volume-based particle size. As finer and narrower the calcium carbonate particles in the polymer matrix become, the less influence the filler has on the melting properties, influencing the melt flow less significantly than the same surface amount of broad size distributio
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26

Ippolito, Fabio, Gunter Hübner, Tim Claypole, and Patrick Gane. "Impact of Bimodal Particle Size Distribution Ratio of Functional Calcium Carbonate Filler on Thermal and Flowability Properties of Polyamide 12." Applied Sciences 11, no. 2 (January 11, 2021): 641. http://dx.doi.org/10.3390/app11020641.

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In previous investigations, it was shown that the melting, as well as crystallization behavior of polyamide 12, could be manipulated by adjusting the particle size distribution of calcium carbonate as a functional filler. It was demonstrated that the melt properties of this compound show a significant dependency on the filler volume-based particle size. As finer and narrower the calcium carbonate particles in the polymer matrix become, the less influence the filler has on the melting properties, influencing the melt flow less significantly than the same surface amount of broad size distributio
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27

Okulov, Ilya, Ivan Soldatov, Ivan Kaban, Baran Sarac, Florian Spieckermann, and Jürgen Eckert. "Fabrication of Metastable Crystalline Nanocomposites by Flash Annealing of Cu47.5Zr47.5Al5 Metallic Glass Using Joule Heating." Nanomaterials 10, no. 1 (January 1, 2020): 84. http://dx.doi.org/10.3390/nano10010084.

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Flash Joule-heating was applied to the Cu47.5Zr47.5Al5 metallic glass for designing fully crystalline metastable nanocomposites consisting of the metastable B2 CuZr and low-temperature equilibrium Cu10Zr7 phases. The onset of crystallization was in situ controlled by monitoring resistivity changes in the samples. The effect of heating rate and annealing time on the volume fraction of the crystalline phases and mechanical properties of the nanocomposites was studied in detail. Particularly, an increase of the heating rate and a decrease of the annealing time lead to a lower number of equilibriu
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28

Wang, Tong Yang, Zhen Xi Sun, Lan Xiang Zhang, and Yan Wang. "Glass Formation and Thermal Stability of Mechanically Alloyed Al75Ni10Ti10Zr5 Amorphous Composites with Graphene Addition." Materials Science Forum 849 (March 2016): 58–63. http://dx.doi.org/10.4028/www.scientific.net/msf.849.58.

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In this study, the influence of 0.5 wt.% graphene (Gr) addition on the glass formation and thermal stability of the Al75Ni10Ti10Zr5 alloy during mechanical alloying (MA) process has been investigated. The as-milled products consist of the amorphous phase and a small amount of the AlNi nanocrystals. The results showed that the 0.5 wt.% Gr addition could shorten the amorphization process, indicating the enhancement of the glass forming ability. Moreover, the onset crystallization temperature (Tx1) slightly decreased with prolonging milling time for the as-milled alloys. However, it is worth noti
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29

Gao, Meng, Chengrong Cao, and John H. Perepezko. "Analysis of Nucleation and Glass Formation by Chip Calorimetry." Applied Sciences 11, no. 16 (August 20, 2021): 7652. http://dx.doi.org/10.3390/app11167652.

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The advent of chip calorimetry has enabled an unprecedented extension of the capability of differential scanning calorimetry to explore new domains of materials behavior. In this paper, we highlight some of our recent work: the application of heating and cooling rates above 104 K/s allows for the clear determination of the glass transition temperature, Tg, in systems where Tg and the onset temperature for crystallization, Tx, overlap; the evaluation of the delay time for crystal nucleation; the discovery of new polyamorphous materials; and the in-situ formation of glass in liquid crystals. Fro
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30

Васильев, С. В., В. И. Парфений, Е. А. Першина, А. С. Аронин, О. В. Коваленко та В. И. Ткач. "Эффективные коэффициенты диффузии и термическая устойчивость структуры металлического стекла Fe-=SUB=-48-=/SUB=-Co-=SUB=-32-=/SUB=-P-=SUB=-14-=/SUB=-B-=SUB=-6-=/SUB=-". Физика твердого тела 62, № 12 (2020): 2012. http://dx.doi.org/10.21883/ftt.2020.12.50203.140.

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The values of linear growth velocities of the eutectic colonies in the temperature range of 679–717 K have been determined for the first time from the electron microscopic studies of the partially crystallized samples of Fe48Co32P14B6 metallic glass. Using these data, the values of the effective diffusion coefficients governing growth have been calculated. It has been established that the temperature dependence of the effective diffusivity in Fe48Co32P14B6 glass is well approximated by an Arrhenius law and their values in the temperature range of crystallization are about 2–3 orders of magnitu
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31

Dimova, Margarita, and Yancho D. Devedjiev. "Protein crystal lattices are dynamic assemblies: the role of conformational entropy in the protein condensed phase." IUCrJ 5, no. 2 (January 10, 2018): 130–40. http://dx.doi.org/10.1107/s2052252517017833.

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Until recently, the occurrence of conformational entropy in protein crystal contacts was considered to be a very unlikely event. A study based on the most accurately refined protein structures demonstrated that side-chain conformational entropy and static disorder might be common in protein crystal lattices. The present investigation uses structures refined using ensemble refinement to show that although paradoxical, conformational entropy is likely to be the major factor in the emergence and integrity of the protein condensed phase. This study reveals that the role of shape entropy and local
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32

Sabet, Maziyar, and Hassan Soleimani. "Broad studies of graphene and low-density polyethylene composites." Journal of Elastomers & Plastics 51, no. 6 (October 3, 2018): 527–61. http://dx.doi.org/10.1177/0095244318802608.

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Graphene (Gr) distribution in low-density polyethylene (LDPE) considerably increased thermal stability, thermal conductivity, mechanical properties, and flexural properties of LDPE/Gr composites. Addition of Grs to LDPE postponed the time for making the polymer brittle. High specific surface area and superior properties of Gr improved thermal stability, conductivity, storage modulus, and mechanical properties of composites. The electrical conductivity of LDPE/Grs composites upgraded owing to the thermal stability of Grs in LDPE matrix. In terms of rheology, the addition of Grs augmented viscos
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33

Roniger, Luis. "Connected histories, power and meaning: Transnational forces in the construction of collective identities." Journal of Classical Sociology 11, no. 3 (August 2011): 251–68. http://dx.doi.org/10.1177/1468795x11406005.

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The construction of collective identities is central to Shmuel N.Eisenstadt’scomparative research program, as reflected in his studies of civilizations and multiple modernities. This article suggests the theoretical relevance of bridging comparative and transnational studies, calling attention to the impact of connected histories in processes of crystallization of collective identities. Focusing on Central America, this analysis shows that, following independence, the societies of this region found it hard to articulate distinct identities; they came to such issues belatedly, almost by default
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34

Thomas, George H., Eliot D. Specht, John Z. Larese, Ziling B. Xue, and David B. Beach. "Growth of epitaxial films of sodium potassium tantalate and niobate on single-crystal lanthanum aluminate [100] substrates." Journal of Materials Research 23, no. 12 (December 2008): 3281–87. http://dx.doi.org/10.1557/jmr.2008.0393.

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Epitaxial films of sodium potassium tantalate (Na0.5K0.5TaO3, NKT) and sodium potassium niobate (Na0.5K0.5NbO3, NKN) were grown on single-crystal lanthanum aluminate (LAO) (100) (indexed as a pseudo-cubic unit cell) substrates via an all-alkoxide solution (methoxyethoxide complexes in 2-methoxyethanol) deposition route for the first time. X-ray diffraction studies indicated that the onset of crystallization in powders formed from hydrolyzed gel samples was 550 °C. 13C nuclear magnetic resonance studies of solutions of methoxyethoxide complexes indicated that mixed-metal species were formed, co
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35

Tomaszewska-Gras, Jolanta, Mahbuba Islam, Liliana Grzeca, Anna Kaczmarek, and Emilia Fornal. "Comprehensive Thermal Characteristics of Different Cultivars of Flaxseed Oil (Linum usittatissimum L.)." Molecules 26, no. 7 (March 31, 2021): 1958. http://dx.doi.org/10.3390/molecules26071958.

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The aim of this study was to describe the thermal properties of selected cultivars of flaxseed oil by the use of the differential scanning calorimetry (DSC) technique. The crystallization and melting profiles were analyzed depending on different scanning rates (1, 2, 5 °C/min) as well as oxidative induction time (OIT) isothermally at 120 °C and 140 °C, and oxidation onset temperatures (Ton) at 2 and 5 °C/min were measured. The crystallization was manifested as a single peak, differing for a cooling rate of 1 and 2 °C/min. The melting curves were more complex with differences among the cultivar
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36

El-Eskandarany, M. Sherif, J. Saida, and A. Inoue. "Mechanically induced devitrifications of ball-milled Zr70Pd20Ni10 glassy alloy powders." Journal of Materials Research 18, no. 2 (February 2003): 250–53. http://dx.doi.org/10.1557/jmr.2003.0034.

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Mechanical alloying using a high-energy ball milling technique was used to fabricate a single glassy phase of Zr70Pd20Ni10 alloy powders after 100 h milling time. Annealing the glassy powders at a temperature just below the crystallization onset temperature led to thermally enhanced devitrification and the formation of a metastable big-cube phase with a lattice constant of 1.2289 nm. The same metastable phase was obtained upon subjecting the end product of the glassy powders to further ball milling time (150 h). This metastable big-cube phase could no longer withstand the shear and impact stre
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37

Blatchford, Hannah J., Keith A. Klepeis, Joshua J. Schwartz, Richard Jongens, Rose E. Turnbull, Elena A. Miranda, Matthew A. Coble, and Andrew R. C. Kylander-Clark. "Interplay of Cretaceous transpressional deformation and continental arc magmatism in a long-lived crustal boundary, central Fiordland, New Zealand." Geosphere 16, no. 5 (August 31, 2020): 1225–48. http://dx.doi.org/10.1130/ges02251.1.

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Abstract Recovering the time-evolving relationship between arc magmatism and deformation, and the influence of anisotropies (inherited foliations, crustal-scale features, and thermal gradients), is critical for interpreting the location, timing, and geometry of transpressional structures in continental arcs. We investigated these themes of magma-deformation interactions and preexisting anisotropies within a middle- and lower-crustal section of Cretaceous arc crust coinciding with a Paleozoic boundary in central Fiordland, New Zealand. We present new structural mapping and results of Zr-in-tita
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38

Dimesso, L., O. B. Hyun, and I. Hirabayashi. "Preparation of LaBa2Cu3Oy thick films in the La–Ba–Cu–O system by partial melting techniques." Journal of Materials Research 10, no. 12 (December 1995): 3016–25. http://dx.doi.org/10.1557/jmr.1995.3016.

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The preparation of thick films of the LaBa2Cu3Oy (La-123) phase by using the partial melting technique (PMT) of powders deposited on MgO substrates by drying alcoholic suspensions is reported. The effects of the starting composition, processing time (t), and temperature (T) on the superconducting properties of the La1+xBa2Cu3Oy (−0.25 ⋚ x ⋚ 0.5) system were investigated. The presence of the La4Ba2Cu2O10 (La 422) phase was detected in the samples quenched in liquid N2 after heating up to 1200 °C. The crucial step of the processing is the cooling rate down to the crystallization temperature, Tp,
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39

Moberg, Daniel R., Daniel Becker, Christoph W. Dierking, Florian Zurheide, Bernhard Bandow, Udo Buck, Arpa Hudait, Valeria Molinero, Francesco Paesani, and Thomas Zeuch. "The end of ice I." Proceedings of the National Academy of Sciences 116, no. 49 (November 4, 2019): 24413–19. http://dx.doi.org/10.1073/pnas.1914254116.

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The appearance of ice I in the smallest possible clusters and the nature of its phase coexistence with liquid water could not thus far be unraveled. The experimental and theoretical infrared spectroscopic and free-energy results of this work show the emergence of the characteristic hydrogen-bonding pattern of ice I in clusters containing only around 90 water molecules. The onset of crystallization is accompanied by an increase of surface oscillator intensity with decreasing surface-to-volume ratio, a spectral indicator of nanoscale crystallinity of water. In the size range from 90 to 150 water
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40

Barberi, Baino, Fiume, Orlygsson, Nommeots-Nomm, Massera, and Verné. "Robocasting of SiO2-Based Bioactive Glass Scaffolds with Porosity Gradient for Bone Regeneration and Potential Load-Bearing Applications." Materials 12, no. 17 (August 22, 2019): 2691. http://dx.doi.org/10.3390/ma12172691.

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: Additive manufacturing of bioactive glasses has recently attracted high interest in the field of regenerative medicine as a versatile class of fabrication methods to process bone substitute materials. In this study, melt-derived glass particles from the SiO2-P2O5-CaO-MgO-Na2O-K2O system were used to fabricate bioactive scaffolds with graded porosity by robocasting. A printable ink made of glass powder and Pluronic F-127 (binder) was extruded into a grid-like three-dimensional structure with bimodal porosity, i.e., the inner part of the scaffold had macropores with smaller size compared to th
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41

Portale, Giuseppe, Dario Cavallo, Giovanni Carlo Alfonso, Daniel Hermida-Merino, Martin van Drongelen, Luigi Balzano, G. W. M. Peters, J. G. P. Goossens, and Wim Bras. "Polymer crystallization studies under processing-relevant conditions at the SAXS/WAXS DUBBLE beamline at the ESRF." Journal of Applied Crystallography 46, no. 6 (November 15, 2013): 1681–89. http://dx.doi.org/10.1107/s0021889813027076.

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Recent developments on the experimental infrastructure and the acquisition of new detectors on the Dutch–Belgian beamline BM26B at the ESRF offer novel and promising possibilities for synchrotron X-ray experiments in the field of polymer crystallization under processing-relevant conditions. In this contribution, some of the most recent experiments mimicking conditions similar to those relevant for the plastics processing industry are discussed. Simultaneous thermal analysis and wide-angle X-ray scattering (WAXS) experiments, at the millisecond time-frame level, on β-nucleated isotactic polypro
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42

Liang, Wang, Yin Xiaochun, He Guangjian, Feng Yanhong, and Qu Jinping. "Ultrasound-assisted melt mixing for the preparation of UHMWPE/OMMT nanocomposites." Journal of Thermoplastic Composite Materials 31, no. 6 (July 21, 2017): 784–802. http://dx.doi.org/10.1177/0892705717720972.

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Ultrahigh molecular weight polyethylene (UHMWPE)/organic montmorillonite (OMMT) nanocomposites were prepared via a self-made vane mixer which could supply a synergy of ultrasound and extensional deformation. Structure and working principle of this novel mixer were illustrated in detail. Effects of the OMMT content, mixing time, and ultrasound treat time on composites’ morphology, rheological properties, and thermal properties were reported in terms of transmission electron microscopy (TEM), wide-angle X-ray scattering, differential scanning calorimetry (DSC), and thermogravimetric analysis (TG
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43

Zhang, Feng-Qi, Hong-Xiang Wu, Yildirim Dilek, Wei Zhang, Kong-Yang Zhu, and Han-Lin Chen. "Guadalupian (Permian) onset of subduction zone volcanism and geodynamic turnover from passive- to active-margin tectonics in southeast China." GSA Bulletin 132, no. 1-2 (May 14, 2019): 130–48. http://dx.doi.org/10.1130/b32014.1.

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Abstract New stratigraphic, geochemical, and geochronological data from the late Paleozoic depositional record in Anhui Province, China, signal the onset of active-margin magmatism in East Asia. Chert-shale sequences of the Gufeng Formation are part of a Carboniferous–Permian carbonate platform that developed along the passive margin of the South China block. Thin tuffaceous interlayers in these sequences represent distal ash deposits, marking discrete volcanic events. Sensitive high-resolution ion microprobe (SHRIMP) U-Pb zircon dating of the stratigraphically bottom and near-top tuffaceous i
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44

McCubbin, Francis M., and Jessica J. Barnes. "The chlorine-isotopic composition of lunar KREEP from magnesian-suite troctolite 76535." American Mineralogist 105, no. 8 (August 1, 2020): 1270–74. http://dx.doi.org/10.2138/am-2020-7467.

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Abstract We conducted in situ Cl isotopic measurements of apatite within intercumulus regions and within a holocrystalline olivine-hosted melt inclusion in magnesian-suite troctolite 76535 from Apollo 17. These data were collected to place constraints on the Cl-isotopic composition of the last liquid to crystallize from the lunar magma ocean (i.e., urKREEP, named after its enrichments in incompatible lithophile trace elements like potassium, rare earth elements, and phosphorus). The apatite in the olivine-hosted melt inclusion and within the intercumulus regions of the sample yielded Cl-isotop
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45

JARRAR, G. "The youngest Neoproterozoic mafic dyke suite in the Arabian Shield: mildly alkaline dolerites from South Jordan – their geochemistry and petrogenesis." Geological Magazine 138, no. 3 (May 2001): 309–23. http://dx.doi.org/10.1017/s0016756801005295.

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The Arabian–Nubian Shield evolved through a sequence of tectonomagmatic cycles, which took place during Neoproterozoic time (1000–540 Ma). Dyke emplacement constitutes one of the conspicuous features of the Arabian–Nubian Shield, with mafic dykes being the most abundant. The investigated dykes represent the youngest Neoproterozoic mafic dykes and have been dated in Jordan at 545 ± 13 Ma. Geochemically the studied dykes are mildly alkaline, are enriched in large ion lithophile elements (LILE) and high field strength cations (HFSC), show moderate enrichment of REE, and lack Nb anomaly. These fea
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46

Zöllmer, Volker, Klaus Raätzke, and Franz Faupel. "Diffusion and isotope effect in bulk-metallic glass-forming Pd–Cu–Ni–P alloys from the glass to the equilibrium melt." Journal of Materials Research 18, no. 11 (November 2003): 2688–96. http://dx.doi.org/10.1557/jmr.2003.0375.

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We report on radiotracer diffusion measurements in metallic bulk-glass-forming Pd-Cu-Ni-P alloys. The Pd-Cu-Ni-P system, with its high stability against crystallization, allows diffusion measurements from the glassy state to the equilibrium melt for the first time. Serial sectioning was performed by grinding and ion-beam sputtering. The time and temperature as well as mass dependence, expressed in terms of the isotope effect E, of codiffusion were investigated. In the glassy state as well as in the deeply supercooled state below the critical temperature Tc, where the mode-coupling theory predi
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47

Chakoumakos, B. C., P. S. Ebey, B. C. Sales, and Edward Sonder. "Characterization and superconducting properties of phases in the Bi–Sr–Cu–O system." Journal of Materials Research 4, no. 4 (August 1989): 767–80. http://dx.doi.org/10.1557/jmr.1989.0767.

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Phase formation in the system Bi–Sr–Cu–O has been examined as a function of composition, temperature, ambient atmosphere, cooling history, and annealing time. Ceramic processing and melt crystallization techniques were used. For the ceramic materials (using Bi2O3, SrCO3, and CuO) processed at 700 °C in air the Bi2Sr2CuO6 composition (221) crystallizes to a mixture of CuO, SrCO3, and the rhombohedral Bi2O3 · xSrO solid solution. At 800–830 °C in air for short durations (5 min to 2 h) the reacted products consist principally of the ideal 221 phase with minor amounts of CuO. For longer reaction t
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48

Rwei, Syang-Peng, Palraj Ranganathan, Whe-Yi Chiang, and Yi-Huan Lee. "Synthesis of Low Melting Temperature Aliphatic-Aromatic Copolyamides Derived from Novel Bio-Based Semi Aromatic Monomer." Polymers 10, no. 7 (July 19, 2018): 793. http://dx.doi.org/10.3390/polym10070793.

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This work investigated the synthesis of a novel low melting temperature polyamide 6 (PA6) copolyamide (PA6-BABT/SA) with different aliphatic/aromatic units weight content using a melt poly-condensation process. The bio-based aromatic N1,N4-bis(4-aminobutyl) terephthalamide diamine (BABT) and long-chain aromatic polyamide salt (BABT/SA, salt of BABT, and sebacic acid), components used for the synthesis of copolyamides, were obtained from bio-based monomers. For the first time, the pertinent BABT/SA aromatic polyamide salt was isolated as a white solid and completely characterized. By varying th
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49

Hooper, P. R., B. A. Gillespie, and M. E. Ross. "The Eckler Mountain basalts and associated flows, Columbia River Basalt Group." Canadian Journal of Earth Sciences 32, no. 4 (April 1, 1995): 410–23. http://dx.doi.org/10.1139/e95-035.

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Recent mapping of flows of the Columbia River Basalt Group between Lewiston and Pomeroy, southeast Washington, places the chemically distinctive Shumaker Creek flow as a new member between the Frenchman Springs and Roza members of the Wanapum Basalt. This leaves the Eckler Mountain Formation composed of only the Robinette Mountain and Dodge chemical types, with the Lookingglass flow forming the base of the overlying Wanapum Basalt. One Robinette Mountain flow and five separate flows of Dodge composition are recognized and traced across the Blue Mountains Anticline of southeast Washington and n
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50

Rätzke, Klaus, V. Zöllmer, A. Bartsch, Andreas Meyer, and Franz Faupel. "Diffusion in Bulk Glass Forming Alloys– from the Glass to the Equilibrium Melt." Defect and Diffusion Forum 266 (September 2007): 109–18. http://dx.doi.org/10.4028/www.scientific.net/ddf.266.109.

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Since the discovery of bulk metallic glasses there has been considerable research effort on these systems, in particular with respect to mass transport. Now the undercooled melt between the melting temperature and the caloric glass transition temperature, which has not been accessible before due to the rapid onset of crystallization, can be investigated and theories can be tested. Here we report on radiotracer diffusion measurements in metallic bulk-glass-forming Pd-Cu-Ni-P alloys. Serial sectioning was performed by grinding and ion-beam sputtering. The time, temperature as well as the mass de
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