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Showing 1 to 15 of 15 for “"Glassy phase"”.
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Crystallization of Lead Metaniobate From a Glassy Phase
Made available in DSpace on 2014-12-05T22:57:03Z (GMT). No. of bitstreams: 1 6100078.pdf: 4300490 bytes, checksum: 281800902b56d025fa60172a26636e2f (MD5) Previous issue date: 1960
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Deformation and fracture behavior during annealing of residually stressed polycrystalline aluminum oxide
… fractographs, it was found that intergranular glassy phase played an important role in the crack formation and propagation. At elevated temperature, viscous intergranular glassy phase behaved as an adhesive layer and when under tensile stresses caused de-adhesion of grain-boundaries or the …
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Constitutive modeling of glassy memory polymers
… related for developing constitutive model for glassy shape memory polymers are addressed in detail. Shape memory polymers are novel material that can be easily formed into complex shapes, retaining memory of their original shape even after undergoing large deformations. The temporary shape is …
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Microstructure of Systems with Competition
… configurations in the liquid as well as the glassy phase. We analyze these using standard methods of local structure analysis - calculation of pair correlation function and structure factor, Voronoi construction, calculation of bond orientational order parameters and calculation of Honeycutt …
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Sodium sulfate corrosion of silicon carbide fiber-reinforced lithium aluminosilicate glass-ceramic matrix composites
… was observed. Mullite dissolved into either the glassy phase or into the Beta- spodumene matrix. Lastly, the presence of distinct magnesium silicate crystalline phases in the salt-coated and heat-treated in oxygen sample implies that the MgO at the surface reacted with the SiO2 in the matrix.
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Glassy models of protein folding
… properties. The model has unfolded, folded and glassy phases. In Chapter Three we investigate the dynamics of the model. The model has many metastable states and the distribution of the lifetimes of these states is log-normal at high temperatures and becomes much broader in the glassy phase. …
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Phonon and Stability Properties in Two Novel Chalcogenide Solids Investigated by Raman Scattering Using High-Pressure and Photocrystallization Experiments
… XVI elements) materials, crystalline BaZrS3 and glassy-phase GexSe1-x alloys. The optical phonons in these materials are investigated by means of Raman spectroscopy, and changes in their phonon spectra are explored using high-pressure and photo-crystallization experiments, respectively, for the …
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Influence of alkali resistant (AR) glass in porcelain clay for vitrified clay pipes
… that the reduction of porosity and increasing of glassy phase was corresponded to the addition of AR glass and rising of sintering temperature. In conclusion, the objective of this study were achieve to satisfied the value of vitrified clay pipes standard based on EN 295.
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Aspects of transformation behaviour in olivines, pyroxenes and titanomagnetites
… results of experimental studies of shock-induced phase transformations are incorrect. TEM studies of titanomagnetites have also shown that the interpretation of the magnetic properties of these oxides may be complicated by their exsolution microstructures. TEM of the black veins of the Tenham …
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Crystal-Amorphous Transformation Via Defect-Templating in Phase-Change Materials
Phase-change materials (PCM) such as GeTe and Ge-Sb-Te alloys are potential candidates for non-volatile memory applications, because they can reversibly and rapidly transform between a crystalline phase and an amorphous phase with medium-range order. Traditionally, crystal-amorphous transformation …
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The Freezing Mechanisms of Perovskite Relaxor Ferroelectrics and the Thermodynamic Stability of their Ferroelectric States
… These materials do not exhibit a ferroelectric phase transition at zero field, but rather enter a glassy-like relaxor regime. The source of the glassy freezing and the thermodynamically stable phase in the relaxor regime are still uncertain. This thesis attempts to explain the entities and …
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Aspects of amidization of chitosan
… complexes of chitosan is a first order, two-phase process with activation energies of 14±1 kcal/mol and 21±2 kcal/mol for the first and second phase, respectively. These values did not vary with the type of acid used in the formation of the chitosan complex. This two-phase behavior is …
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Modeling of magnetorheological elastomers
… Similarly, cooling an ultrasoft MRE below a glassy phase transition increases the elastic modulus, and magnetometry measurements show no magnetic hysteresis when below this temperature. A more sophisticated model is developed that takes into account the nonlinear magnetic susceptibility and …
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Development of nanogels from nanoemulsions and investigation of their rheology and stability
… the effective volume fraction of the dispersed phase (eff) close to the random jamming, resulting in repulsive gelation. 2) At SDS concentration between 5 – 15 times CMC, micelle induced depletion attractions led to extensive droplet aggregation and gelation. 3) At very high SDS concentration, …