کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5436115 1509540 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermodynamics versus kinetics of grain growth control in nanocrystalline zirconia
ترجمه فارسی عنوان
ترمودینامیک در مقابل سینتیک کنترل رشد دانه در زیرکونیا نانوکریستال
کلمات کلیدی
مواد نانوکریستال، رشد دانه، غنی سازی مرز دانه، سرامیک،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی

This work presents a thorough analysis of the grain growth behavior of gadolinium doped yttria stabilized zirconia (YSZ). The effect of the dopant on the thermodynamics as well as on the kinetics of the process is reported by providing extensive experimental data. While normal grain growth following a parabolic growth relation was observed, gadolinium inhibited the process proportionally to its concentration. By using microcalorimetry, we showed that the dopant decreases the grain boundary energy of YSZ, and hence reduces the driving force for growth. Analysis of the growth profile at different temperatures and times indicate that gadolinium does not significantly affect the grain boundary mobility or the activation energy for grain growth. The results rationalize that the dopant is acting on a mostly thermodynamic basis and opens good perspective for design of coarsening control focused on the system energetics.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 136, 1 September 2017, Pages 224-234
نویسندگان
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