Preparation and mechanical characterisation of aluminium nitride - titanium nitride and aluminium nitride - silicon carbide composites

摘要

Dense aluminium nitride (A1N) based particle reinforced composites were prepared to increase the fracture toughness of AlN-based materials. Titanium nitride (TiN) (0 to 20 vol%) and silicon carbide (SiC) (0 to 30 vol%) particles, respectively, were added to A1N to prepare the composite materials. Fracture strength, fracture toughness, hardness and E-modulu were measured using 4-points bending and Vickers indentation method. The fracture toughness was increased more than 30 % by adding TiN (SENB) and 25 % by adding SiC (indentation method). Also the Vickers hardness was increased about 15 and 60 % for TiN and SiC-particle reinforcement, respectively.