Journal ArticleDOI
Granulation, Phase Change, and Microstructure Kinetics of Phase Change. III
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TLDR
In this paper, a comprehensive description of the phenomena of phase change may be summarized in Phase Change, Grain Number and Microstructure Formulas or Diagrams, giving, respectively, the transformed volume, grain, and microstructure densities as a function of time, temperature, and other variables.Abstract:
The theory of the preceding papers is generalized and the notation simplified. A cluster of molecules in a stable phase surrounded by an unstable phase is itself unstable until a critical size is reached, though for statistical reasons a distribution of such clusters may exist. Beyond the critical size, the cluster tends to grow steadily. The designation ``nuclei'' or ``grains'' is used according as the clusters are below or above the critical size. It is shown that a comprehensive description of the phenomena of phase change may be summarized in Phase Change, Grain Number and Microstructure Formulas or Diagrams, giving, respectively, the transformed volume, grain, and microstructure densities as a function of time, temperature, and other variables. To facilitate the deduction of formulas for these densities the related densities of the ``extended'' grain population are introduced. The extended population is that system of interpenetrating volumes that would obtain if the grains granulated and grew through each other without mutual interference. The extended densities are much more readily derivable from an analysis of the fundamental processes of granulation and growth. It is shown that, under very general circumstances, the densities of the actual grain population may be expressed simply in terms of the extended population.read more
Citations
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Impact of nanoclay on isothermal cold crystallization kinetics and polymorphism of poly(L-lactic acid) nanocomposites.
TL;DR: The thermal characteristics, isothermal cold crystallization kinetics, and structural changes of neat PLLA and its nanocomposites during annealing were studied by using differential scanning calorimetry (DSC) and Fourier transform infrared (FTIR) spectroscopy.
Journal ArticleDOI
Oxygen adsorption on aluminum single crystal faces studied by AES, XPS and LEED
C.W.B. Martinson,S. A. Flodström +1 more
TL;DR: The adsorption of oxygen on low index single crystal faces of aluminum at room temperature has been studied by AES, XPS and LEED as mentioned in this paper, which revealed that the (100) surface oxidizes in a manner different to that for the (110) and (111) surfaces which display similar oxygen uptake curves.
Journal ArticleDOI
Transcrystallinity effects in thin polymer films. Experimental and theoretical approach
TL;DR: In this paper, an experimental and theoretical investigation of the overall crystallization kinetics of thin polymer films containing transcrystalline regions on their surfaces is presented, where typical features of crystallization curves can be associated with the occurrence of trans-crystallinity.
Journal ArticleDOI
Investigation of surface-modified solid lipid nanocontainers formulated with a heterolipid-templated homolipid
TL;DR: Results obtained from analysis of the isothermal crystallization exotherms indicated that the templated homolipid and SLN1 containing 1.0% polysorbate 80 possessed good properties and could prove to be good delivery systems for drugs for parenteral or ocular administration.
Journal ArticleDOI
Achieving superior cycling stability by in situ forming NdH2–Mg–Mg2Ni nanocomposites
TL;DR: In this paper, the authors reported the Nd4.3Mg87.0Ni8.7 alloy formed by hydrogen induction with remarkably fast hydrogen storage kinetics and high hydrogen storage capacity (78.6% of the maximum value).
References
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Journal ArticleDOI
Kinetics of Phase Change. I General Theory
TL;DR: In this paper, the theory of phase change is developed with the experimentally supported assumptions that the new phase is nucleated by germ nuclei which already exist in the old phase, and whose number can be altered by previous treatment.
Journal ArticleDOI
Kinetics of Phase Change. II Transformation‐Time Relations for Random Distribution of Nuclei
TL;DR: In this article, a relation between the actual transformed volume V and a related extended volume V1 ex is derived upon statistical considerations, and a rough approximation to this relation is shown to lead, under the proper conditions, to the empirical formula of Austin and Rickett.
Journal ArticleDOI
Grand Partition Functions and So‐Called ``Thermodynamic Probability''
TL;DR: The relation due to Boltzmann between entropy and thermodynamic probability is enunciated in a precise form in this paper and generalized in such a way that each of the other thermodynamic potentials is related in a similar manner to a ''thermodynamic probability'' for which a more suitable name is a ''partition function''.