The estimation parameter of nanoceramics crystalline structure deviation from thermodynamically equilibrium state

O. Khasanov, E. Dvilis, T. Miloivanova

Результат исследований: Материалы для книги/типы отчетовМатериалы для конференции

Аннотация

Using XRD techniques the correlations of the relative crystallite microstrains (RCM) with apparent crystallite sizes (ACS) for zirconia ceramic nanopowders, their green compacts pressed under different power of ultrasound action, and nanostructured ceramics sintered from them at various temperatures were analyzed. It was shown, that for all the samples the RCM values are inversely proportional to magnitudes of ACS with proportionality coefficient k, which is constant with high precision for the same material in equilibrium state. Physically coefficient k is a value of ACS actual change ΔdACS under microstresses action of crystallite having the certain defective substructure in a material existing in a stable state. The equation for coefficient k as a quantity of actual change of the ACS under microstrains action was offered. The difference between the coefficient k for ceramics sintered at lower temperatures and its statistical average value for ceramics sintered at optimal temperature reflects a deviation degree of the examined matter structure from thermodynamically equilibrium state. This deviation can be an estimation parameter of ceramics processing efficiency or compliance of technological conditions with optimal ones. The modulus of | k ΔdACS | was minimal for the structural zirconia ceramics sintered at optimum temperature and having the maximum mechanical characteristics.

Язык оригиналаАнглийский
Название основной публикацииProceedings - KORUS 2003: 7th Korea-Russia International Symposium on Science and Technology
ИздательInstitute of Electrical and Electronics Engineers Inc.
Страницы157-160
Число страниц4
Том1
ISBN (печатное издание)8978686176, 9788978686174
СостояниеОпубликовано - 2003
Событие7th Korea-Russia International Symposium on Science and Technology, KORUS 2003 - Ulsan, Республика Корея
Продолжительность: 28 июн 20036 июл 2003

Другое

Другое7th Korea-Russia International Symposium on Science and Technology, KORUS 2003
СтранаРеспублика Корея
ГородUlsan
Период28.6.036.7.03

ASJC Scopus subject areas

  • Building and Construction
  • Pollution
  • Biotechnology
  • Social Sciences (miscellaneous)
  • Medicine (miscellaneous)
  • Education

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