Effect of Yttria Content on the Zirconia Unit Cell Parameters Academic Article uri icon

abstract

  • The relationship between yttria concentration and the unit cell parameters in partially and fully stabilized zirconia has been reassessed, motivated by the need to improve the accuracy of phase analysis upon decomposition of tbased thermal barrier coatings. Compositions ranging from 6 to 18mol% YO1.5 were synthesized and examined by means of highresolution Xray diffraction. Lattice parameters were determined using the Rietveld refinement method, a wholepattern fitting procedure. The revised empirical relationships fall within the range of those published previously. However, efforts to achieve superior homogeneity of the materials, as well as accuracy of the composition and lattice parameters, provide increased confidence in the reliability of these correlations for use in future studies. Additional insight into the potential sources for scatter previously reported for the transition region (~1214mol% YO1.5), where tetragonal and cubic phases have been observed to coexist, is also provided. Implications on the current understanding of stabilization mechanisms in zirconia are discussed.

published proceedings

  • JOURNAL OF THE AMERICAN CERAMIC SOCIETY

author list (cited authors)

  • Krogstad, J. A., Lepple, M., Gao, Y., Lipkin, D. M., & Levi, C. G.

citation count

  • 96

complete list of authors

  • Krogstad, Jessica A||Lepple, Maren||Gao, Yan||Lipkin, Don M||Levi, Carlos G

editor list (cited editors)

  • Green, D. J.

publication date

  • December 2011

publisher