Feng B.,South China University of Technology |
Feng B.,Foshan Ceramic Research Institute |
Zhou Y.,Foshan Ceramic Research Institute |
Peng C.,South China University of Technology |
And 5 more authors.
Journal of the American Ceramic Society | Year: 2015
AlN ceramics is very difficult to be sintered due to its strong covalent bonds and low self-diffusion. In this work, a new hot-press sintering system assisted by vibration was used to densify AlN ceramics. During hot-pressing process an additional vibration caused by pressure fluctuation is imposed on the sample. The well-densified AlN ceramics had been obtained at 1750°C under 15 MPa, or at 1800°C under 10 MPa which were much milder than traditional hot-press conditions and would be beneficial to prolong working life of the graphite mold. The samples made by this method have a bending strength about 320 MPa. After annealing, it shows a thermal conductivity of 217 W/mK. © 2015 The American Ceramic Society.