Produção Nacional
Revisado por pares
Grain boundary blocking effect in tetragonal yttria stabilized zirconia
1998; Elsevier BV; Volume: 18; Issue: 11 Linguagem: Inglês
10.1016/s0955-2219(98)00017-x
ISSN1873-619X
AutoresAdelina P. Santos, Rosana Zacarias Domingues, M. Kleitz,
Tópico(s)Intermetallics and Advanced Alloy Properties
ResumoAbstract samples of yttria stabilized tetragonal zirconia, with different grain sizes have been synthesized. Care was taken to avoid the presence of any trace of monoclinic zirconia. The features of their grain boundary blocking effect are compared to those of YSZ samples of similar purity. Certain variation laws of the blocking effects are quasi identical, especially some dependences on the grain size. The most significant differences concern the variation of the blocking factor with temperature and the transition to the so-called intrinsic regime. In tetragonal zirconia, the blocking factor continuously decreases in the temperature interval 150–600 °C and the onset of the intrinsic regime could occur at a smaller grain size of about 0.9 μm.
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