کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8948559 | 1645669 | 2018 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
New anti-ablation candidate for carbon/carbon composites: Preparation, composition and ablation behavior of Y2Hf2O7 coating under an oxyacetylene torch
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Y2Hf2O7 possesses low thermal conductivity and high melting point, which make it promising for a new anti-ablation material. For evaluating the thermal stability and the potential applications of Y2Hf2O7 on anti-ablation protection of C/C composites, Y2Hf2O7 ceramic powder was synthesized by solution combustion method and Y2Hf2O7 coating was prepared on the surface of SiC coated C/C composites using SAPS. Results shown that the coating exhibits good ablation resistance under the heat flux of 2.4âMW/m2 with the linear and mass ablation rates are 0.16âμmâsâ1 and â0.028âmgâsâ1, respectively, after ablation for 40âs. With the prolonging of the ablation time, the increasing thermal stress causes the increase of cracks. Moreover, the chemical erosion from SiO2 and the physical volatilization of low temperature molten products aggravate failure of the Y2Hf2O7 coating.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 38, Issue 15, December 2018, Pages 5082-5091
Journal: Journal of the European Ceramic Society - Volume 38, Issue 15, December 2018, Pages 5082-5091
نویسندگان
Shengyue Gu, Shouyang Zhang, Fei Liu, Wei Li,