A Practical Approach for the Calculation of the Activation Energy of the Sintering

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Datum
2016-12-15Alternativní metriky PlumX
http://hdl.handle.net/11012/63895Metadata
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Newly developed software for calculation of activation energy (Qs in the following) of
sintering using the Wang and Raj model is presented. To demonstrate the practical potential
of the software and to evaluate the behaviour of the Qs during the sintering process, alumina
and cubic zirconia ceramic compacts were prepared from nanometric powders. The results
obtained with both materials are in agreement with previously published data calculated by
different approaches. In the interval of interest (relative densities from 60 % to almost 100 %
of theoretical density), both materials show similar behaviour. Three distinct regions can be
seen: the initial constant values of Qs 868 kJ/mol and 762 kJ/mol for alumina and cubic
zirconia, respectively; a region containing linear drop of Qs and the final region of constant
Qs values 625 kJ/mol and 645 kJ/mol for alumina and cubic zirconia, respectively.
Zdrojový dokument
Science of sintering. 2016, vol. 48, issue 3, p. 317-324.http://www.iiss.sanu.ac.rs/download/vol48_3/vol48_3_05.pdf