کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7886233 | 1509785 | 2018 | 19 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
In-situ observation of oxygen mobility and abnormal lattice expansion in ceria during flash sintering
ترجمه فارسی عنوان
مشاهده درون مکان انتقال اکسیژن و گسترش غدد غیرطبیعی در سرایا در طوفان فلزی
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
Flash sintering has been shown to be an effective method of sintering for many types of ceramics. However, the characteristics of flash sintering for each type of ceramic varies. When ionically conducting ceramics are sintered under a DC electric field, a strong dependence of densification with respect to position is observed. Microstructural analysis of the effect of electric field on oxygen ion conductors shows non-stoichiometry (oxygen deficiency) at the cathode which continues to build up over time under flash. In oxygen ion conductors, dominant charge carriers during flash are oxygen ions and the final density of the specimen is related to the availability of oxygen. This effect is no longer evident when using an AC power supply. Thus, use of AC instead of DC electric field is preferable for flash sintering of ionically conducting ceramics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 13, September 2018, Pages 15362-15369
Journal: Ceramics International - Volume 44, Issue 13, September 2018, Pages 15362-15369
نویسندگان
Shikhar Krishn Jha, Harry Charalambous, Han Wang, Xin Li Phuah, Christopher Mead, John Okasinski, Haiyan Wang, Thomas Tsakalakos,