کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7898264 | 1510132 | 2018 | 25 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Porous γ-(Y1-xHox)2Si2O7 thermal insulator with excellent high-temperature strength retention and very low thermal conductivity
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Porous γ-(Y1-xHox)2Si2O7 thermal insulator with excellent high-temperature strength retention and very low thermal conductivity Porous γ-(Y1-xHox)2Si2O7 thermal insulator with excellent high-temperature strength retention and very low thermal conductivity](/preview/png/7898264.png)
چکیده انگلیسی
High-temperature thermal insulation materials challenge extensive candidates with good mechanical, thermal and chemical reliability at high temperatures. Recently, porous γ-Y2Si2O7 was indicated a promising thermal insulator in harsh environment; however, its strength at 1300â¯Â°C reduced to 34% of that at room temperature. In this work, we significantly improved its high-temperature strength by doping Ho. Highly porous γ-(Y1-xHox)2Si2O7 solid solution was fabricated by in-situ foam-gelcasting method. Especially, porous γ-(Y2/3Ho1/3)2Si2O7 demonstrated the optimal high-temperature strength, for instance 65% retention at 1300â¯Â°C, as well as high compressive strength (13.9â¯MPa) and low thermal conductivity (0.186â¯W/(mâ¯K)) at room temperature, at the porosity of 79.3%. Interestingly, porous solid solution sample displayed obviously lower thermal conductivity than the two end pure-phase porous materials. Porous γ-(Y1-xHox)2Si2O7 solid solution is clearly highlighted as a promising high-temperature thermal insulator with outstanding high-temperature strength retention and optimal low thermal conductivity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 38, Issue 9, August 2018, Pages 3347-3353
Journal: Journal of the European Ceramic Society - Volume 38, Issue 9, August 2018, Pages 3347-3353
نویسندگان
Zhen Wu, Wanpeng Hu, Yixiu Luo, Luchao Sun, Jingyang Wang,