کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1449723 988713 2007 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Interactions between domain switching and crack propagation in poled BaTiO3 single crystal under mechanical loading
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Interactions between domain switching and crack propagation in poled BaTiO3 single crystal under mechanical loading
چکیده انگلیسی

In this paper, the interactions between the crack propagation and corresponding domain switching in ferroelectric single crystal under mechanical loading were investigated. An experimental setup with a polarized light microscope (PLM) was designed and constructed to in situ observe the crack propagation in poled BaTiO3 specimens subjected to three-point-bending loading. The observed domain switching was stimulated by the intensive stress field near the crack tip, and the theoretical R-curve taking into account the domain switching toughening agrees well with the experimental results quantitatively. It is confirmed from the actual switched zone that the 90° domain switching is the major mechanism of the fracture toughening, and the apparent fracture toughness increases by 150% in the BaTiO3 single crystal specimen.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 55, Issue 17, October 2007, Pages 5758–5767
نویسندگان
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