Journal article

Publication year: 2012

Pages: 939-943

Journal: Journal of Materials Research

Volume number: 27

Issue number: 6

ISSN: 0884-2914

DOI Link: https://doi.org/10.1557/jmr.2011.439

Publisher: Springer

Abstract: 
Yttria-stabilized zirconia (YSZ)/Al2O3 multilayers deposited on Pt foil were studied by differential scanning calorimetry. Observed thermal effects were interpreted using additional evidence from x-ray diffraction and transmission electron microscopy. The crystallization temperature of YSZ increases from 344 to 404 degrees C as the layer thickness decreases from 15 to 4 nm. The enthalpy of crystallization becomes more exothermic with decreasing thickness, and it was measured to be -26 kJ/mol YSZ for 4-nm-thick layers and -12 kJ/mol for 15-nm-thick layers. The latter value is consistent with the reported crystallization enthalpy for YSZ powder of the same composition prepared by precipitation from aqueous solution. The more exothermic crystallization enthalpies for thinner films are indicative of a decrease in their degree of crystallinity. The 2-6-nm-thick Al2O3 layers remain amorphous when heated to 1000 degrees C. The described methodology enables thermal analysis of oxide thin films using commercial instruments.

Harvard Citation style: Kemik, N., Ushakov, S., Gu, M., Schichtel, N., Korte, C., Browning, N., et al. (2012) Yttria-stabilized zirconia crystallization in Al₂O₃/YSZ multilayers, Journal of Materials Research, 27(6), pp. 939-943. https://doi.org/10.1557/jmr.2011.439

APA Citation style: Kemik, N., Ushakov, S., Gu, M., Schichtel, N., Korte, C., Browning, N., Takamura, Y., & Navrotsky, A. (2012). Yttria-stabilized zirconia crystallization in Al₂O₃/YSZ multilayers. Journal of Materials Research. 27(6), 939-943. https://doi.org/10.1557/jmr.2011.439