کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1450663 988742 2005 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Heterogeneity of fatigue in bulk lead zirconate titanate
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Heterogeneity of fatigue in bulk lead zirconate titanate
چکیده انگلیسی

The spatial heterogeneity of fatigue in commercial ferroelectric lead zirconate titanate ceramics was experimentally investigated. All parameters measured on fatigued samples are spatially highly heterogeneous including large signal polarisation and strain hysteresis loops (remnant polarisation Pr, coercive field Ec, bias field Ebias, and strain asymmetry γ) as well as the small signal parameters determined from field dependent converse piezoelectric measurements (remnant piezoelectric coefficient dr, coercive field Ec, offset piezoelectric coefficient doffset, and bias field Ebias). The local strain asymmetry γ was found to linearly depend on the local bias field Ebias. An analogous relation is established for doffset and Ebias. Switching time retardation is similarly heterogeneous across the sample. The previously determined stretched exponential polarisation relaxation equally well occurs locally. A spatial correlation to the observed microcrack densities could not be found.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 53, Issue 8, May 2005, Pages 2203–2213
نویسندگان
, , , , , ,