S042024 Mechanical properties of Aluminum Nitride type Nano Ceramics

Abstract

Aluminum nitride (AlN) /hexagonal boron nitride (h-BN) composites. were fabricated from AlN and h-BN nanopowders. Spark plasma sinterng. was used for densification. Boron nitride addition is varied from 0 vol. % to 20 vol. %. Gamma-AlON/h-BN composites were obtained from commercial AlN and h -BN nanopowders. Dense AlN/h-BN composites, which had higher bulk density than 95% in relative density, were obtained from AlN nanopowder synthesized by gas reaction nitndation and commercial h-BN nanopowder by optimizing sintering condition. Thermal conductivity of AlN ceramics without BN is 71.8 W/(mK) and that of AlN/ 20Vol%BN is 40 3 W/(mK).