کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1582914 | 1514879 | 2008 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of an applied electric field on the flow stress of ultrafine-grained 2.5Y-TZP at high temperatures
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
It was concluded that the rate-controlling mechanism in the present tests is grain boundary sliding accommodated by lattice diffusion of the Zr ions with a threshold stress Ïo, giving an acting effective stress Ïe = Ï â Ïo. It was determined for this case that ÎÏE* contained reductions in both the effective stress (ÎÏe,E*) and in the threshold stress (ÎÏo,E). Analysis of the behavior in terms of an electrochemical potential for vacancy formation showed that ÎÏe,E* and ÎÏo,E are related to changes in the electric field potential pertaining to the space charge at the grain boundaries. The calculated width of the space charge region acted on by the electric field was 3-5 nm in the temperature range of 1450-1550 °C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 477, Issues 1â2, 25 March 2008, Pages 358-365
Journal: Materials Science and Engineering: A - Volume 477, Issues 1â2, 25 March 2008, Pages 358-365
نویسندگان
H. Conrad, Di Yang, P. Becher,