Influence of Surface to Volume Ratio on the Onset of Power Density and Full Densification of YSZ
March 10-15, 2019
To establish the effect of sample thickness on the flash onset, we measure the sintering behavior of thin and thick films of 3 mol% yttria, the following is noted. (i) The onset of flash moves to a higher value for the thinner specimens. (ii) The power transition falls within a narrow band when the power is normalized with respect to surface rather than volume. (iii) Sintering of thinner specimens require a higher current density limit. These results point to a deeper significance of black body radiation than its use in estimating the specimen temperature in a steady state of flash.
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Viviana Avila and Rishi Raj, "Influence of Surface to Volume Ratio on the Onset of Power Density and Full Densification of YSZ" in "Electric Field Enhanced Processing of Advanced Materials II: Complexities and Opportunities", Rishi Raj, University of Colorado, USA Olivier Guillon, Forschungzentrum Jülich, Germany Hidehiro Yoshida, National Institute for Materials Science, Japan Eds, ECI Symposium Series, (2019). https://dc.engconfintl.org/efe_advancedmaterials_ii/45