کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5440723 1398236 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of grain growth on the thermal conductivity of liquid-phase sintered silicon carbide ceramics
ترجمه فارسی عنوان
اثر رشد دانه بر هدایت حرارتی سرامیک کاربید سیلیکون متصل به فاز مایع
کلمات کلیدی
کاربید سیلیکون، هدایت حرارتی، رشد دانه، محتوای اکسیژن مشبک،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی
The effect of grain growth on the thermal conductivity of SiC ceramics sintered with 3 vol% equimolar Gd2O3-Y2O3 was investigated. During prolonged sintering at 2000 °C in an argon or nitrogen atmosphere, the β → α phase transformation, grain growth, and reduction in lattice oxygen content occurs in the ceramics. The effects of these parameters on the thermal conductivity of liquid-phase sintered SiC ceramics were investigated. The results suggest that (1) grain growth achieved by prolonged sintering at 2000 °C accompanies the decrease of lattice oxygen content and the occurrence of the β → α phase transformation; (2) the reduction of lattice oxygen content plays the most important role in enhancing the thermal conductivity; and (3) the thermal conductivity of the SiC ceramic was insensitive to the occurrence of the β → α phase transformation. The highest thermal conductivity obtained was 225 W(m K)−1 after 12 h sintering at 2000 °C under an applied pressure of 40 MPa in argon.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 37, Issue 11, September 2017, Pages 3475-3481
نویسندگان
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