کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5459030 | 1516181 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ablation behavior of sharp-shape C/C-SiC-ZrB2 composites under oxyacetylene flame
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Ablation behavior of sharp-shape C/C-SiC-ZrB2 composites under oxyacetylene flame Ablation behavior of sharp-shape C/C-SiC-ZrB2 composites under oxyacetylene flame](/preview/png/5459030.png)
چکیده انگلیسی
C/C-SiC-ZrB2 composites with sharp leading edge shape were prepared by reactive melt infiltration, and their ablation behavior was investigated by subjected to the oxyacetylene flame with a heat flux of 2.38Â MW/m2 for 60Â s. The results show that after adding ZrB2 particles the mass and linear ablation rates of the C/C-SiC composites could be reduced by 36% and 52%, respectively. The ablated regions of the composites can be divided into two regions according the ablated features: brim ablation region and center ablation region. In the brim ablation region, a kind of 'embedding structure' of Zr-O-Si glass layer was formed on the surface of the C/C-SiC-ZrB2 composites, and the ablated surface of the C/C-SiC composites was covered by a melting SiO2 layer. In the center ablation region, the molten SiO2 layer cannot resist the intensive impact of high-temperature, speed and pressure oxyacetylene flame, resulting in the failure of the protective coating for C/C-SiC composites. The surface of C/C-SiC-ZrB2 composites was covered by a sintered ZrO2 layer, which acted as an effective oxygen species and heat flux barrier and protected the composites against further ablation, resulting in an excellent configurational stability of C/C-SiC-ZrB2 composites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 713, 5 August 2017, Pages 19-27
Journal: Journal of Alloys and Compounds - Volume 713, 5 August 2017, Pages 19-27
نویسندگان
Yue Liu, Qiangang Fu, Yiwen Guan, Beibei Wang, Qingliang Shen,