High temperature ceramics processing

Machining is emerging as an inevitable requirement for flexible use of advanced ceramics, especially for high temperature structural ceramics. However, extremely high hardness and low fracture toughness of ceramics makes conventional machining very difficult or even impossible.
Silicon nitride and hexagonal boron nitride ceramics
Si3N4/h-BN ceramics
Alumina and lanthanum phosphate ceramic composites
Al2O3/LaPO4 ceramics