Development of Design-Fabrication-Evaluation Methodology for High Performance Composites Reinforced by Carbon Nanotube

为促进工程陶瓷复合材料的实际应用，开展了多壁碳纳米管（MWCNT）增强氧化铝复合材料的制备与评价研究。主要通过控制所使用的MWCNT的刚性和通过其表面改性来实现MWCNT在基质前体中的均匀分散。此外，考虑到工业应用的优势，与以往研究中使用的压力辅助技术相比，开发了无压烧结方法。这些成果使我们能够成功地生产出均匀的MWCNT/氧化铝复合材料，与文献数据相比，具有最高的强度和断裂韧性。结果表明，所制备的MWCNT/Al 2 O3复合材料具有良好的上级摩擦磨损性能、导电性能和电磁波吸收性能，为MWCNT/Al 2 O3复合材料的实际应用奠定了基础。

Preparation and evaluation of multi-walled carbon nanotube (MWCNT) reinforced alumina composites were conducted with the objective of promoting practical applications of engineered ceramic composites. Uniform dispersion of MWCNTs in matrix precursors was achieved primarily by controlling the rigidity of the MWCNTs used and through their surface modifications. Furthermore, in view of the advantage for industrial applications, a pressureless sintering method was developed in contrast with the pressure-assisted techniques used in the previous studies. The achievements then enabled us to successfully produce homogeneous MWCNT/alumina composites with the highest strength and fracture toughness compared with the literature data. It was demonstrated that the MWCNT/alumina composites developed in this study had superior friction/wear properties, electric conductivity, and electric magnetic wave absorption characteristics, providing a useful foundation for their practical applications.