Elastic properties of partially-stabilized HfO2 compositions
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The effect of metastable tetragonal HfO2 on the elastic properties of partially stabilized HfO2 doped with Er2O3, Y2O3 or Eu2O3 was studied using a sonic resonance technique. The elastic moduli were monitored at elevated temperatures to follow the effect of the tetragonal-monoclinic phase transformation. Elastic moduli were also determined as a function of porosity and found to follow linear relations. The non-linear modulus versus temperature relations from room temperature to 500° C are explained in terms of the oxygen vacancies present in the fluorite type phase.
KeywordsHfO2 Tetragonal Phase Elastic Modulo Dole Shear Modulo
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- 9.D. R. Wilder, J. D. Buckley, D. W. Stacy, andJ. K. Johnstone,Coll. Int. du Cen. Nat. de la Recherche Scientifique 205 (1971) 335.Google Scholar