کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1656324 | 1517579 | 2016 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
SiC/ZrB2-SiC-ZrC multilayer coating for carbon/carbon composites against ablation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
To improve the ablation resistance of carbon/carbon (C/C) composites at high temperature, a ZrB2-SiC-ZrC coating was prepared on the surface of SiC-coated C/C composites by supersonic atmosphere plasma spray (SAPS). Ablation resistance of the coated C/C composites was tested in an oxyacetylene torch environment with a heat flux of 2400Â kW/m2 for 120, 150 and 200Â s, respectively. After ablation for 120Â s, the coating exhibited a three-layered structure consisting of a porous ZrO2 layer, a ZrO2-SiO2 thin layer and a SiC-depleted layer, whereas it transformed into a two-layered structure (ZrO2 recrystallized layer and ZrO2-SiO2 layer) after ablation for 150Â s. With the increase of ablation time, the SiC inner coating was almost consumed and a gap emerged between the ZrO2 layer and the C/C matrix after ablation for 200Â s. The good ablation resistance of the sprayed coating is mainly attributed to the layered structure acting as a thermal barrier and inhibiting inward diffusion of oxygen.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 300, 25 August 2016, Pages 1-9
Journal: Surface and Coatings Technology - Volume 300, 25 August 2016, Pages 1-9
نویسندگان
Yulei Zhang, Heng Hu, Pengfei Zhang, Zhixiong Hu, Hejun Li, Leilei Zhang,