HfB2 and HfB2–10vol% HfC fine powders were synthesized by carbo/boronthermal reduction of HfO2, which showed high sinterability. Using the as-synthesized powders and commercially available SiC as starting powders, nearly full dense HfB2–20vol% SiC (HS) and HfB2–8vol% HfC–20vol% SiC (HHS) ceramics were obtained by hot pressing at 2000°C/30MPa. With the incorporation of HfC, the grain size of HHS was much finer than HS. As well, the fracture toughness and bending strength of HHS (5.09MPam1/2, 863MPa) increased significantly compared with HS (3.95MPam1/2, 654MPa). Therefore, it could be concluded that the incorporation of HfC refined the microstructure and improved the mechanical properties of HfB2–SiC ceramics.
|Journal||Journal of the European Ceramic Society|
|Publication status||Published - 2012|
- Hot pressing
- Mechanical properties
- Hafnium diboride
Ni, D. W., Liu, J-X., & Zhang, G-J. (2012). Microstructure refinement and mechanical properties improvement of HfB2–SiC composites with the incorporation of HfC. Journal of the European Ceramic Society, 32(10), 2557-2563. https://doi.org/10.1016/j.jeurceramsoc.2012.02.017