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
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Effect of an applied electric field on the flow stress of ultrafine-grained 2.5Y-TZP at high temperatures
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 σo, giving an acting effective stress σe = σ − σo. It was determined for this case that ΔσE* contained reductions in both the effective stress (Δσe,E*) and in the threshold stress (Δσo,E). Analysis of the behavior in terms of an electrochemical potential for vacancy formation showed that Δσe,E* and Δσo,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 1–2, 25 March 2008, Pages 358-365
نویسندگان
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