Fabrication of Alumina Composite Ceramics with High Addition of Carbon Nanotubes

Song Bi; Xun Jia Su; Gen Liang Hou; Feng Guo; Zhou Xiao

doi:10.4028/www.scientific.net/MSF.686.423

Paper Titles

Effects of Load and Sliding Distance on the Wear Properties of Hybrid Friction Materials
p.401

Microstructural Model of Enveloping-Core Fiber Distribution of Conifer Wood and Research on Biomimetic Wood Composite
p.406

Experimental Study on Mechanical Properties of X-Cor Sandwich
p.411

Fabrication and Properties of Cf/SiC Composites Derived from Polysiloxane Precursor
p.419

Fabrication of Alumina Composite Ceramics with High Addition of Carbon Nanotubes
p.423

Model and Maximal Pull-Out Force of Helicoidal Fiber Structure in the Underpinnings of Tumblebug Cuticle
p.427

Influence of Nano-SiO₂ on the Strength of High Performance Concrete
p.432

Preparation of CNTs/PANi Core/Shell-Structured Nanowires and Improvement of Sensitivity of Chemical Sensors
p.438

Preparation of Ultrafine White Cement and its Hydration
p.448

HomeMaterials Science ForumMaterials Science Forum Vol. 686Fabrication of Alumina Composite Ceramics with...

Fabrication of Alumina Composite Ceramics with High Addition of Carbon Nanotubes

Abstract:

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.