Crystal nucleation in liquids and glasses
WebMar 16, 2024 · It presents an update on the recent developments concerning the mechanisms of nucleation, crystal growth and phase separation, bringing together theoretical aspects and characterization methods. It also covers current and future applications of a large variety of glass-ceramics. The book comprises three main parts. WebMay 26, 2016 · The three snapshots depict a crystalline cluster nucleating within the supercooled liquid phase (homogeneous nucleation) or as a result of the presence of a foreign impurity (heterogeneous nucleation), as well as the simultaneous occurrence of multiple crystalline clusters in the unstable liquid.
Crystal nucleation in liquids and glasses
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WebAug 14, 2024 · ABSTRACT: Crystal nucleation plays a critical role in the stability of supercooled liquids and glasses and is often controlled through addition of polymers. A … WebThe classical nucleation theory () is the most widely used and simplest approach to understanding crystallization mechanisms, based on the appearance of nuclei. It considers that a nucleation event takes place in most liquids due to fluctuations. This step leads to the formation of a nucleus preceding the growth stage.
WebMay 30, 2016 · The origin of the previously reported correlations between glass transition temperatures and intensity of crystallization processes is … WebDec 3, 2024 · Crystal nucleation in a supercooled liquid typically attains its maximal rate near the glass transition temperature Tg and slows down with further cooling, becoming exceedingly slow in the glassy ...
WebDec 31, 1990 · Publisher Summary This chapter focuses on measurements and theories pertaining to homogeneous nucleation under cooled liquids and glasses that transform … WebDec 5, 2024 · Indeed, in the application of CNT and also of other theoretical models of crystallization of liquids and glasses, it is as a rule assumed that nucleation proceeds only after the supercooled liquid or the glass has completed structural relaxation processes toward the metastable equilibrium state.
WebThis method, developed by Gustav Tammann (Tammann’s method) more than 100 years ago to measure crystal nucleation rate in organic liquids (Tammann G. Z Phys Chem 25:441, 1898), was successfully applied to inorganic glasses for the first time by Ito et al. (Ito M, Sakaino T, Moriya T. Bull Tokyo Inst Technol 88:127, 1968) and Filipovich and ...
WebJan 1, 1991 · CRYSTAL NUCLEATION IN LIQUIDS AND GLASSES 135 of samples quenched at different rates, the nucleation and growth rates were determined to obtain an estimate of the interfacial energy between the icosahedral phase and the … Journal of Non-Crystalline Solids 79 (1986) 295-309 295 North-Holland, Amsterdam … Journal of Non-Crystalline Solids 73 (1985) 477-499 a77 North-Holland, Amsterdam … Later Frenkel5) and Zeidovich6) considered nucleation as a non-steady state … On the peculiarities of nucleation of the crystalline phase in glasses, in: Prob- … This paper is a report of some studies leading to a new mathematical … Similar formulae may be derived to account for phase invariance or other … The results tying liquids, the main experimental difficulty is the which have … Thermodynamic conditions for the formation of metastable phases from undercooled … Kinetics of clustering processes that involve monoatomic addition or subtraction of … Journal of Crystal Growth 52 (1981) 115-121 cQ North-Holland Publishing … pinal county interpreter requestWebMar 19, 2024 · Crystallization of a liquid below liquidus temperature is a complex process due to simultaneous nucleation and growth of crystals. Nucleation is the crucial initial … pinal county inspection codesWebIt has been found that for a large number of polymers [48,54,55,63,64,65], but also for small molecules , there is a well-defined sequence of enthalpy relaxation/densification of the … to share is to careWebVahak Marghussian, in Nano-Glass Ceramics, 2015. The control of crystal nucleation and growth processes in glass is the key in preparing glass-ceramic materials with desired, … pinal county inmate locatorWebStep 1: Nucleation Homogeneous:spontaneous formation from the melt; composition of the melt and crystal are the same. Heterogeneous: nuclei form on some 'foreign' surface: impurities, crucible wa ll, bubbles, seeds, etc. If you do not first form a nuclei (and there are no heterogeneities), crystallization can be avoided. pinal county interpreters officeWebThe nucleation induction time was evaluated at the beginning of measurement at intervals of 1, 5, 10, 15, and 30 min, as shown in Figure 6, to determine the ability of chitosan to inhibit AM crystal nucleation. The result showed that chitosan maintained the initial supersaturation level of AM for 30 min, indicating the inhibitory effect of WSC ... pinal county inmatesWeb1 day ago · 1.Introduction. The dendritic crystallization occurring during the evaporation of solutions is a fundamental crystal growth phenomenon and a good example of pattern selection and stability in non-equilibrium systems [1].The studies on the crystal forming, initiating, and patterning characteristics of the dendritic crystal are significant for different … to share italian