کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5022076 1469485 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation, mechanical, thermal and ablative properties of lightweight needled carbon fibre felt/phenolic resin aerogel composite with a bird's nest structure
ترجمه فارسی عنوان
خواص آماده سازی، مکانیکی، حرارتی و تخلیه از فیبر کربن سوزنی سبک وزن / فنولیک ترکیبات آئروژل رزین با ساختار لانه پرنده
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
چکیده انگلیسی
A novel lightweight needled carbon fibre felt/phenolic resin (NCF-PR) aerogel composite was fabricated through vacuum impregnation using NCF as matrix and PR aerogels as filler. The PR aerogels was synthesized through polymerization-induced phase separation (PIPS), accompanied by solvent exchange and ambient pressure drying, from a resin mixture of PR with ethylene glycol (EG) as the porogen and hexamethylenetetramine (HMTA) as the catalyst. A homogeneous microstructure without macroscopic cracking and agglomeration was achieved in the composite, and the macropores between the fibres in the NCF were fully and uniformly filled by PR aerogels with high porosity and with large amounts of mesopores. The resulting NCF-PR aerogel composites exhibit low densities between 0.270 and 0.370 g/cm3, relatively high compressive strength, ranging from 0.83 to 11.02 MPa, and low thermal conductivities of 0.093-0.230 W/(mK) at room temperature. The thermal ablative properties of the aerogel composite were studied under arc jet conditions at a heat flux of 1.5 MW/m2 for 33 s. The ablation results demonstrate that the NCF-PR aerogel composite could deliver good thermal ablative and insulative properties (linear ablation rates as low as 0.029 mm/s and internal temperature peaks below 90 °C at 38 mm in-depth position as the surface temperature exceeded 2000 °C). Therefore, this lightweight carbon/phenolic composite is an excellent heat-insulation and thermal-protection material with applications in the fields of energy-saving and aerospace.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Science and Technology - Volume 140, 1 March 2017, Pages 63-72
نویسندگان
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