کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1296266 1498334 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimum strain state for oxygen diffusion in yttria-stabilised zirconia
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Optimum strain state for oxygen diffusion in yttria-stabilised zirconia
چکیده انگلیسی

The strain effect of the oxygen diffusion in the yttria-stabilised zirconia in the present study was investigated by means of a molecular dynamics simulation. The simulation was conducted for various parameters such as the strain, temperature, yttria concentration, and potential parameter, and in addition, the biaxial and hydrostatic cases were considered. For a uniaxial strain, the oxygen diffusion was enhanced in the tensile direction whereas it was hindered in the compressive direction. The maximum improvement was achieved for a smaller strain at a lower temperature and also with a lower yttria concentration. For the biaxial and hydrostatic strains, the total diffusion coefficient was enhanced simply as a result of the enhancement when using the uniaxial strain in each direction. The detailed deformation analysis reveals that the optimum strain state for the highest oxygen diffusion in the tensile direction can be obtained when the oxygen ion is largely displaced in the fluorite lattice structure.

Research Highlights
► The oxygen diffusion in YSZ can be enhanced by the tensile strain.
► The maximum improvement caused by the uniaxial strain is 44%.
► The optimum strain state for the diffusion has been illustrated.
► The present result will contribute to developing novel electrolyte materials.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 190, Issue 1, 19 May 2011, Pages 75–81
نویسندگان
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