کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1563137 999605 2009 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Loading path effect on the chemical expansion in substoichiometric LSF based perovskite
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
پیش نمایش صفحه اول مقاله
Loading path effect on the chemical expansion in substoichiometric LSF based perovskite
چکیده انگلیسی
Permeation induced expansion in substoichiometric perovskites is a key point of their mechanical reliability under oxygen activity gradient. This paper proposes a macroscopic modelling of this phenomenon based on the choice of oxygen activity as state variable. This approach helps to underline the asymmetry of the chemical expansion in its dependence on the difference between the actual surrounding atmosphere and the sintering one. It leads to the development of the notion of loading path in terms of surrounding atmosphere change. The investigations show that the intrinsic chemical expansion behaviour is independent of the sintering atmosphere. The apparent chemical expansion behaviour is driven by the loading path. A study of the sensitivity of each parameters of the model helps to better estimate the possibilities and the limits of the proposed approach.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computational Materials Science - Volume 46, Issue 4, October 2009, Pages 912-920
نویسندگان
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