Articles
  • Mechanical properties of in-situ growth carbon nanotubes reinforced porous ceramics by direct foaming 
  • Sangram Mazumdera, Jung Gyu Parka, Naboneeta Sarkarb, Kee Sung Leec, Bijay Basneta and Ik Jin Kima,*
  • a Institute of Processing and Application of Inorganic Materials, (PAIM), Department of Materials Science and Engineering, b Hanseo University # 360, Seosan-si, Chungnam 356-706, Korea c School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164-2920, USA d School of Mechanical Systems Engineering, Kookmin University, 77, Jeongneung-ro, Seongbuk-gu, Seoul 136-702, Korea
Abstract
This paper reports the formation of carbon nanotubes (CNTs) reinforced porous Al2O3 ceramics by a novel combination ofthree processes. Porous ceramics are developed using direct foaming. Cobalt nanoparticles as catalysis agents aresimultaneously synthesized and dispersed by colloidal process to prepare the suitable catalyst material for carbon nanotubessynthesis. The catalytic chemical vapour deposition (CCVD) technique is used to directly synthesize CNTs within the porousceramics and the effect of growth time on the morphology, crystallinity and yield of CNTs are investigated. Hertzianindentations are used to evaluate the damage behaviour under constrained loading conditions. The mechanical behaviour fromindentation load-displacement curves is compared according to CNTs contents in the samples.

Keywords: Carbon nanotubes, Porous ceramics, Colloidal process, Hertzian method, Quasi-plastic behaviour

This Article

  • 2016; 17(12): 1274-1278

    Published on Dec 31, 2016