Fabrication of alumina composite ceramics with high addition of carbon nanotubes
Carbon nanotubes-alumina (CNTs-Al2O3) composite ceramics with 25vol％ CNTs were fabricated by sol-gel method and followed by hot-pressing. The resultant ceramics and powders were characterized for their microstructure and composition by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and infrared spectra (IR). The mechanical properties of the ceramics were measured by micromechanical testing system (MTS). The results show that both ultrasonic calefaction process during the gelation of alumina sol and annealing process during the sintering can remarkably enhance the fracture toughness and flexural strength of CNTs-Al2O3 composite ceramics, compared with the composite ceramics without undergoing these processes. It is believed to be due to the relatively uniform dispersion of CNTs and the lower thermal stress in the matrices.
Alumina Carbon nanotubes Sol-gel method Hot-pressing Ultrasonic calefaction Annealing
Song Bi Xunjia Su Genliang Hou Feng Guo Zhou Xiao
501 Department, Xi’an High Technology Institute, Shaanxi Xi’an 710025, China
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
423-426
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）