کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9761745 | 1498427 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructure degradation of an anode/electrolyte interface in SOFC studied by transmission electron microscopy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
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چکیده انگلیسی
This work is one of the first attempts of using focused ion beam/lift-out (FIB/lift-out) techniques to prepare TEM specimens containing electrode/electrolyte interfaces in solid oxide fuel cells (SOFC). The present specimen was made from an Ni+YSZ (anode)/YSZ (electrolyte) half-cell which has undergone a long-term testing at a temperature of 850 °C over 1800 h in H2 with 1% to 3% H2O under an anodic load of 300 mA cmâ2. The microstructure and phase chemistry in the interfacial region was analyzed using a JEM-3000F and EDS with a lateral resolution of nanometers. The impurity phase accumulated at the interface seen earlier by SEM have been characterized. It is a silicate glass with an amorphous structure and a composition of â¼90 mol% SiO2 as well as a few percent of Na2O, CaO, ZrO2, V2O3 etc. The silicate glass phase is distributed as films of nanoscale along the anode/electrolyte interface and Ni/YSZ grain boundaries. Its influence on the microstructural degradation of the interfacial region is evaluated. The FIB/lift-out techniques have been shown to be viable for specimen preparation from SOFC interface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 176, Issues 5â6, 14 February 2005, Pages 435-442
Journal: Solid State Ionics - Volume 176, Issues 5â6, 14 February 2005, Pages 435-442
نویسندگان
Y.L. Liu, Chengge Jiao,