کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1543862 1512870 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Morphological evolution and migration of void in bi-piezoelectric interface based on nonlocal phase field method
ترجمه فارسی عنوان
تکامل مورفولوژیک و مهاجرت خالی در رابط بی پیزوالکتریک بر اساس روش میدان فضایی غیرخطی
کلمات کلیدی
مواد بی بیوژن، تکامل نقایص خالی، روش میدان فاز، انتشار بی نظیر، تئوری الاستیک غیرخطی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
چکیده انگلیسی


• The evolution of void in bi-piezoelectric interface.
• Scale effect has an influence on the evolution of void.
• The evolution of left boundary decreases with the growth of scale effect.

This paper reports the result of investigation into the morphological evolution and migration of void in bi-piezoelectric material interface by utilizing nonlocal phase field model and finite element method (FEM), where the small scale effect containing the long-range forces among atoms is considered. The nonlocal elastic strain energy and the nonlocal electric energy around the void are firstly calculated by the finite element method. Then based on the finite difference method (FDM), the thermodynamic equilibrium equation containing the surface energy and anisotropic diffusivity is solved to simulate the morphological evolution and migration of elliptical void in bi-piezoelectric films interface. Results show that the way of load condition plays a significant role in the evolution process, and the boundary of void's long axis gradually collapses toward the center of ellipse. In addition, the evolutionary speed of left boundary gradually decreases with scale effect coefficient growth. This work can provide references for the safety evaluation of piezoelectric materials in micro electro mechanical system.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 79, May 2016, Pages 107–112
نویسندگان
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