摘要
采用多壁碳纳米管作为增韧材料 ,用杂凝聚的方法制备碳纳米管 氧化铝复合粉末 ,通过热压烧结的方法得到了碳纳米管 氧化铝复合材料 .复合材料的断裂韧度是相同条件下所得纯氧化铝陶瓷的 2 .1倍 ,而强度基本上没有变化 .通过SEM对复合材料断裂表面研究后发现 ,复合材料的增韧机制主要是碳纳米管的桥联机制 ,在局部区域也存在着碳纳米管的拔出机制 .
With MWNTs as toughening agent, on the heterocoagulation method of dispersing MWNTs in Al 2O 3, MWNTs-Al 2O 3 ceramic composite are obtained by hot pressed sintering. The fracture toughness has increased 1.8 times in comparison with pure alumina prepared in the same conditions, and the flexure strength varies slightly. For ceramic composite obtained, the toughening mechanism is mainly MWNTs bridging. At the same time, the MWNTs pulled-out mechanism is observed also.
出处
《纳米技术与精密工程》
CAS
CSCD
2004年第3期182-186,共5页
Nanotechnology and Precision Engineering
