کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1297737 1498350 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Oxygen diffusion in yttria-stabilized zirconia subjected to uniaxial stress
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Oxygen diffusion in yttria-stabilized zirconia subjected to uniaxial stress
چکیده انگلیسی

In the present study, the oxygen diffusion in the yttria-stabilized zirconia was investigated under various stress conditions by means of the molecular dynamics simulation. With the uniaxial tensile stress, the oxygen ions preferentially migrate in the tensile direction and hardly in the other vertical direction without changing the total diffusion property. On the other hand, the uniaxial compressive stress deteriorates the oxygen diffusion in the compressive direction, which has the highest activation energy. These effects are clearly observed with the stress above 1 GPa and could be attributed to the elastic strain energy. For the case of the hydrostatic stress, the dilation by the tension increases the total oxygen diffusion whereas the shrinkage by the compression deteriorates it, which can be considered as the accumulative effect of the uniaxial stress in each direction. The present result indicates that the ionic conductivity of the yttria-stabilized zirconia could be enhanced by applying directional stresses.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 181, Issues 8–10, 29 March 2010, Pages 441–446
نویسندگان
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