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  • Differential scanning calorimetry was used to study nucleation behavior in As2Se3 glass, dependent on particle size. The nucleation process was examined for a series of different coarse powders; the nucleation rate was estimated from the proportion of the crystalline material fraction. The enthalpy of fusion was utilized in this respect, and a correlation between Delta H-m, and Delta H-c was confirmed. Two mechanisms of nucleus formation were found: classical heterogeneous nucleation (following CNT) and so-called %22activation%22 of mechanically-induced defects. The latter appears to represent rapid formation of crystallization centers from a damaged glassy structure, where complete saturation occurs for fine powders in the range of 195-235 degrees C. A high amount of mechanical defects, on the other hand, was found to partially suppress the CNT nucleation process.
  • Differential scanning calorimetry was used to study nucleation behavior in As2Se3 glass, dependent on particle size. The nucleation process was examined for a series of different coarse powders; the nucleation rate was estimated from the proportion of the crystalline material fraction. The enthalpy of fusion was utilized in this respect, and a correlation between Delta H-m, and Delta H-c was confirmed. Two mechanisms of nucleus formation were found: classical heterogeneous nucleation (following CNT) and so-called %22activation%22 of mechanically-induced defects. The latter appears to represent rapid formation of crystallization centers from a damaged glassy structure, where complete saturation occurs for fine powders in the range of 195-235 degrees C. A high amount of mechanical defects, on the other hand, was found to partially suppress the CNT nucleation process. (en)
Title
  • Nucleation in As2Se3 glass studied by DSC
  • Nucleation in As2Se3 glass studied by DSC (en)
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  • Nucleation in As2Se3 glass studied by DSC
  • Nucleation in As2Se3 glass studied by DSC (en)
skos:notation
  • RIV/00216275:25310/14:39898140!RIV15-GA0-25310___
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(GAP106/11/1152)
http://linked.open...iv/cisloPeriodika
  • October
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  • 33236
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  • RIV/00216275:25310/14:39898140
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  • Particle size; Enthalpy of fusion; As2Se3 glass; DSC; Nucleation (en)
http://linked.open.../riv/klicoveSlovo
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  • NL - Nizozemsko
http://linked.open...ontrolniKodProRIV
  • [F40CFBEDC36C]
http://linked.open...i/riv/nazevZdroje
  • Thermochimica Acta
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http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 593
http://linked.open...iv/tvurceVysledku
  • Málek, Jiří
  • Svoboda, Roman
http://linked.open...ain/vavai/riv/wos
  • 000343846200004
issn
  • 0040-6031
number of pages
http://bibframe.org/vocab/doi
  • 10.1016/j.tca.2014.08.014
http://localhost/t...ganizacniJednotka
  • 25310
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