کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5438676 1398186 2017 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Highly resistive SiC ceramics sintered with Al2O3-AlN-Y2O3 additions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Highly resistive SiC ceramics sintered with Al2O3-AlN-Y2O3 additions
چکیده انگلیسی
A polycrystalline SiC ceramic prepared by pressureless sintering of α-SiC powders with 3 vol% Al2O3-AlN-Y2O3 additives in an argon atmosphere exhibited a high electrical resistivity of ~1013 Ω cm at room temperature. X-ray diffraction revealed that the SiC ceramics consisted mainly of 6H- and 4H-SiC polytypes. Scanning electron microscopy and high resolution transmission electron microscopy investigations showed that the SiC specimen contained micron-sized grains surrounded by an amorphous Al-Y-Si-O-C-N film with a thickness of ~4.85 nm. The thick boundary film between the grains contributed to the high resistivity of the SiC ceramic.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 6, 15 April 2017, Pages 5343-5346
نویسندگان
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