The deviation coefficient of crystalline nanoceramics structure from thermodynamically equilibrium state

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Abstract

By XRD analysis of YSZ nanopowders and ceramics sintered from them it was shown that relative crystallite microstresses vary inversely as sizes of the area of coherent scattering with some coefficient of proportionality k. Physically coefficient k is a value of actual change of the average crystallite size ΔdACS under microstresses action of crystallite having the certain defective substructure in a material existing in a stable state. The difference between the coefficient k and calculated value of the Δd ACS reflects a deviation degree of the examined matter structure from thermodynamically equilibrium state, and may be considered as parameter of efficiency of technological processing conditions. The modulus of | k -ΔdACS | was minimal for the structural zirconia ceramics sintered at optimum temperature and having the maximum mechanical characteristics.

Original languageEnglish
Pages (from-to)2367-2370
Number of pages4
JournalKey Engineering Materials
Volume264-268
Issue numberIII
Publication statusPublished - 2004

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Coherent scattering
Crystallite size
Zirconia
Crystalline materials
Processing
Temperature
zirconium oxide

Keywords

  • Apparent Crystallite Size
  • Equilibrium State
  • Nanoceramics
  • Optimal Processing
  • Relative Microstresses

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemical Engineering (miscellaneous)

Cite this

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abstract = "By XRD analysis of YSZ nanopowders and ceramics sintered from them it was shown that relative crystallite microstresses vary inversely as sizes of the area of coherent scattering with some coefficient of proportionality k. Physically coefficient k is a value of actual change of the average crystallite size ΔdACS under microstresses action of crystallite having the certain defective substructure in a material existing in a stable state. The difference between the coefficient k and calculated value of the Δd ACS reflects a deviation degree of the examined matter structure from thermodynamically equilibrium state, and may be considered as parameter of efficiency of technological processing conditions. The modulus of | k -ΔdACS | was minimal for the structural zirconia ceramics sintered at optimum temperature and having the maximum mechanical characteristics.",
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T1 - The deviation coefficient of crystalline nanoceramics structure from thermodynamically equilibrium state

AU - Khasanov, O. L.

AU - Dvilis, E. S.

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AB - By XRD analysis of YSZ nanopowders and ceramics sintered from them it was shown that relative crystallite microstresses vary inversely as sizes of the area of coherent scattering with some coefficient of proportionality k. Physically coefficient k is a value of actual change of the average crystallite size ΔdACS under microstresses action of crystallite having the certain defective substructure in a material existing in a stable state. The difference between the coefficient k and calculated value of the Δd ACS reflects a deviation degree of the examined matter structure from thermodynamically equilibrium state, and may be considered as parameter of efficiency of technological processing conditions. The modulus of | k -ΔdACS | was minimal for the structural zirconia ceramics sintered at optimum temperature and having the maximum mechanical characteristics.

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KW - Equilibrium State

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KW - Optimal Processing

KW - Relative Microstresses

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