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Simulation of the Thermoelastic Properties of Sintered Ceramics

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Abstract:

Many ceramic materials are composed of various phases, which can differ in their individual thermal, elastic or electrical properties by orders of magnitude. The microstructural arrangement of the phases controls important material properties of the composite. To simulate these macroscopic material properties from the material properties of the constituting phases, a 3-D FEM model is used. The key for an adequate description of real materials is the accurate threedimensional modeling of their microstructure. Basic morphological parameters of many ceramics are reflected by a modified Voronoi model, e.g.: the volume fractions, grain size ratios and contiguity of the phases. By automatically generating thousands of test structures and comparing them to quantitative data derived from image analysis of scanning electron micrographs, structures are selected which closely fit to the microstructure of experimental samples. The model considerations are illustrated on two types of bi-continuous ceramic materials, a porous alumina (Al2O3) and a dense zirconia toughened alumina (ZTA) ceramic. Using different volume fractions of the phases, Voronoi type microstructures and truncated sphere models are exemplified. For these two ceramic systems, elastic moduli and thermal conductivity are calculated and compared to experimental data of samples of the respective microstructure.

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Periodical:

Advances in Science and Technology (Volume 45)

Pages:

89-94

DOI:

https://doi.org/10.4028/www.scientific.net/AST.45.89

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Online since:

October 2006

Authors:

Maria Iuga, Friedrich Raether

Keywords:

Composite, Mechanical Property, Microstructure, Simulation, Thermal Property

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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References

[1] F. Raether and M. Iuga: article in press in J. Eur. Ceram. Soc., accepted 16 July (2005).

Google Scholar

[2] D.P.H. Hasselman and L. F. Johnson: J. Comp. Matter. 21 (1987), p.508.

Google Scholar

[3] Y. -M. Lee, R. -B. Yang, S. -S. Gau: Int. Comm. Heat Mass Transf. 33 (2006), p.142.

Google Scholar

[4] D.S. Smith, S. Grandjean, J. Absi, S. Kadiebu and S. Fayette: High Temp. - High Press. 35/36 (2003/2004), p.93.

DOI: 10.1068/htjr084

Google Scholar

[5] D.S. Smith, S. Fayette, S. Grandjean and C. Martin: J. Am. Ceram. Soc. 86 (2003), p.105.

Google Scholar

[6] L. Braginsky, V. Shklover, H. Hofmann and P. Bowen: Phys. Rev. B 70 (2004), p.134201.

Google Scholar

[7] M. Iuga and F. Raether: IX ECERS Conference, to be published in J. Eur. Ceram. Soc.

Google Scholar

[8] F. Raether, J. Meinhardt., A. Klimera and J. Ruska: Material Week 2000, Munich, Germany, Symp. A Materials Development for Microelectronic Devices, www. materialsweek. org, (2000).

Google Scholar

[9] F. Raether, R. Hoffman, G. Mueller and H. J. Soelter: J. Thermal Analysis 53 (1998), p.717.

Google Scholar

[10] W. Gitzen, ed.: Alumina as a Ceramic Material (Am. Ceram. Soc., Westerville, Ohio, 1970).

Google Scholar