Abstract: Al2O3 nanoparticles reinforced carbon foam composites, with zirconium modified phenolic resin as origin of carbon, Al2O3 nanoparticles as reinforcement, and phenolic hollow microspheres as closed phase, were prepared by the process of compression molding and carbonization. The effects of the amount of Al2O3 nanoparticles on the microstructure, compression and bending properties, and oxidation resistance of carbon foam composites were investigated by SEM, universal testing machine and thermal oxidation furnace, respectively. Results showed that Al2O3 nanoparticles induced the rough interface between the matrix and the microspheres, making them more tightly bonded. When the amount of Al2O3 nanoparticles was 10wt%, the compressive strength and specific compressive strength both reached the maximum, 18.53 MPa and 37.82 MPa·cm3·g-1, respectively. Compared to pure carbon foam, the compressive strength and specific compressive strength of modified carbon foam increased by 97% and 61.41%, respectively. While the addition of Al2O3 nanoparticles did not improve the bending properties significantly. When the content of Al2O3 nanoparticles is 15wt%, the oxidation resistance performance shows the best; the weight loss is 28.15% during the isothermal oxidation, at 700℃ for 30 min.
王斌, 罗晓宇, 王琛, 周晓蕊, 胡颖晖, 房二鑫. 纳米Al2O3粒子含量对碳泡沫复合材料力学和高温氧化性能的影响[J]. 材料导报, 2020, 34(18): 18159-18164.
WANG Bin, LUO Xiaoyu, WANG Chen, ZHOU Xiaorui, HU Yinghui, FANG Erxin. Influence of Content of Al2O3 Nanoparticles on the Mechanical and High-temperature Oxidation Properties of Carbon Foam Composites. Materials Reports, 2020, 34(18): 18159-18164.
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