کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7898005 | 1510130 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Low-thermal-conductivity and high-toughness CeO2-Gd2O3 co-stabilized zirconia ceramic for potential thermal barrier coating applications
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
Yttria partially stabilized zirconia (â¼4.0â¯mol% Y2O3-ZrO2, 4YSZ) has been widely employed as thermal barrier coatings (TBCs) to protect the high-temperature components of gas-turbine engines. The phase stability problem existing in the conventional 4YSZ has limited it to application below 1200â¯Â°C. Here we report an excellent zirconia system co-doped with 16â¯mol% CeO2 and 4â¯mol% Gd2O3 (16Ce-4Gd) presenting nontransformable feature up to 1500â¯Â°C, in which no detrimental monoclinic (m) ZrO2 phase formed on partitioning. It also exhibits a high fracture toughness of â¼46â¯J mâ2 and shows high sintering resistance. Besides, the thermal conductivity and thermal expansion coefficient of 16Ce-4Gd are more competent for TBCs applications as compared to the 4YSZ. The combination of properties suggests that the 16Ce-4Gd system could be of potential use as a thermal barrier coating at 1500â¯Â°C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 38, Issue 11, September 2018, Pages 3986-3993
Journal: Journal of the European Ceramic Society - Volume 38, Issue 11, September 2018, Pages 3986-3993
نویسندگان
Kuo Jiang, Songbai Liu, Xin Wang,