An ultra-fast densification method based on high heating rate from the combustion reaction for producing carbon nanotubes （CNTs） reinforced alumina ceramics is reported. The heat generated by combustion reaction is ...An ultra-fast densification method based on high heating rate from the combustion reaction for producing carbon nanotubes （CNTs） reinforced alumina ceramics is reported. The heat generated by combustion reaction is adopted to act as a high temperature source to the sample, which results in a heating rate of 1660℃/min of the sample. Then a great mechanical pressure is applied to the sample when the sample gets the expected temperature. The densification process is finished in several minutes. The results indicate that the densification method is beneficial to protect the CNTs from destruction and creates good interracial combination between the nanotubes and the matrix. With the addition of 1 wt% CNTs, the fracture toughness of the ceramics prepared increases about 50%.展开更多
基金supported by the Ministry of Science and Technology of China (Grant No. S2010GR0771)the National Natural Science Foundation of China (Grant No. 50821140308)
文摘An ultra-fast densification method based on high heating rate from the combustion reaction for producing carbon nanotubes （CNTs） reinforced alumina ceramics is reported. The heat generated by combustion reaction is adopted to act as a high temperature source to the sample, which results in a heating rate of 1660℃/min of the sample. Then a great mechanical pressure is applied to the sample when the sample gets the expected temperature. The densification process is finished in several minutes. The results indicate that the densification method is beneficial to protect the CNTs from destruction and creates good interracial combination between the nanotubes and the matrix. With the addition of 1 wt% CNTs, the fracture toughness of the ceramics prepared increases about 50%.
