Cation interdiffusion in polycrystalline fluorite-cubic solid solutions
1981; Elsevier BV; Volume: 96; Issue: 1-2 Linguagem: Inglês
10.1016/0022-3115(81)90214-2
ISSN1873-4820
AutoresY. Oishi, Yoshio Sakka, Kazuya Ando,
Tópico(s)Aluminum Alloys Composites Properties
ResumoA grain-boundary enhanced diffusion model was applied to the cation interdiffusion in polycrystalline fluorite-cubic solid solutions to determine separately the lattice and grain-boundary interdiffusion coefficients. The Zr-Hf lattice interdiffusion coefficients determined for the 16 CaO · 84(Zr1−xHfx)O2 system in the temperature range of 1502–2083°C were described by D = rm 0.023 exp(−90 × 103/RT) cm2/s and those for the 14 MgO · 86(Zr1−xHfx)O2 system in the temperature range of 1680–2083°C by D = 0.033 exp(−91 × 103/RT) cm2/s. The two results were close to the Zr lattice self-diffusion coefficient reported for CaO-stabilized zirconia.
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