Journal
COMPOSITES PART B-ENGINEERING
Volume 60, Issue -, Pages 597-602Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2013.12.042
Keywords
Nano-structures; Thermomechanical; Electron microscopy; Thermal analysis
Funding
- Defense Acquisition Program Administration
- Agency for Defense Development (ADD) [UD070009AD]
- BK21 program
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Highly ablation resistant carbon nanotube (CNT)/phenolic composites were fabricated by the addition of low concentrations of CNTs. Tensile and compressive mechanical properties as well as ablation resistance were significantly improved by the addition of only 0.1 and 0.3 wt% of uniformly dispersed CNTs. An oxygen-kerosene-flame torch and a scanning electron microscope (SEM) were used to evaluate the ablative properties and microstructures. Thermal gravimetric analysis (TGA) revealed that the ablation rate was lower for the 0.3 wt% CNT/phenolic composites than for neat phenolic or the composite with 0.1 wt% CNTs. Ablation mechanisms for all three materials were investigated using TGA in conjunction with microstructural studies using a SEM. The microstructural studies revealed that CNTs acted as an ablation resistant phase at high temperatures, and that the uniformity of the CNT dispersion played an important role in this ablation resistance. (C) 2014 Elsevier Ltd. All rights reserved.
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