The new thought for designing the multi-phase and multi-scale nanocomposites was
proposed to improve the comprehensive mechanical properties. Multi-phase and multi-scale
particles are added to the matrix, and one of the additives is nano-scale particle, thus the
comprehensive mechanical properties can be improved by the synergic effects of micro-scale
toughening, nano-scale strengthening and mutual benefit between multi-phases. The ideal
microstructure of multi-phase and multi-scale nanocomposites was designed. With this
microstructure, the trans/intergranular fracture modes can be formed, which will consume more
fracture energy during the crack propagation, therefore, both the flexural strength and fracture
toughness can be improved. An advanced ceramic tool material has been fabricated based on this
new thought.
