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Analytical Representations of Elastic Moduli Data With Simultaneous Dependence on Temperature and Porosity.

R G Munro1

  • 1National Institute of Standards and Technology, Gaithersburg, MD 20899.

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|July 2, 2016
PubMed
Summary

This study presents an analytical model for polycrystalline ceramics, accurately representing temperature and porosity effects on elastic and bulk moduli. The model was successfully applied to literature data for 24 oxide ceramic materials.

Keywords:
analytical modelceramicselastic modulipolycrystalline materials

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Area of Science:

  • Materials Science
  • Solid State Physics
  • Ceramic Engineering

Background:

  • Polycrystalline ceramics exhibit complex mechanical behavior influenced by temperature and porosity.
  • Accurate modeling of elastic and bulk moduli is crucial for predicting ceramic performance.
  • Existing models may not simultaneously capture temperature and porosity effects self-consistently.

Purpose of the Study:

  • To develop and apply an analytical model for predicting the temperature and porosity dependence of elastic and bulk moduli in polycrystalline ceramics.
  • To provide a unified framework for understanding the interplay between microstructure and mechanical properties.
  • To validate the model against experimental data.

Main Methods:

  • Development of a simultaneous, self-consistent analytical model.
  • Incorporation of temperature and porosity as key dependent variables.
  • Application of the model to a dataset of 24 oxide ceramics from existing literature.

Main Results:

  • The model successfully represents the simultaneous dependence of elastic and bulk moduli on temperature and porosity.
  • Quantitative agreement was observed between model predictions and compiled literature data for diverse oxide ceramics.
  • The model provides insights into the microstructural origins of mechanical property variations.

Conclusions:

  • The developed analytical model offers a robust tool for predicting ceramic moduli under varying conditions.
  • This work advances the understanding of structure-property relationships in polycrystalline ceramics.
  • The findings are applicable to the design and application of advanced ceramic materials.