PRODUCTION AND CHARACTERIZATION OF WC-Co CEMENTED CARBIDES BY FIELD ASSISTED SINTERING


Ozudogru R. E. , Şahin F. , Yücel O.

International Conference on Sintering, California, United States Of America, 16 - 20 November 2009, vol.209, pp.249-257 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 209
  • City: California
  • Country: United States Of America
  • Page Numbers: pp.249-257

Abstract

Cemented WC-Co bulk materials were obtained from mixed WC-Co powder by using Field Assisted Sintering technique. Powder mixtures were sintered at 1300 degrees C, 1350 degrees C and 1375 degrees C under 50MPa pressure in order to determine the effects of sintering temperatures. Sintering behavior and mechanical properties such as density, hardness, fracture toughness and modulus of elasticity of fine-grained WC-5 wt% Co and WC-10 wt% Co hard metal were investigated. Microstructural observations were carried out by Scanning Electron Microscopy (SEM) technique. Test results show that densities of bulk materials sintered at 1375 degrees C are higher than 99 % of theoretical density. Mechanical test results point out that hardness, fracture toughness and modulus of elasticity are more dependent on composition of cobalt content than sintering temperature.