CO2 Laser Surface Treatment Of (Si3n4) Engineering Ceramic

Maryam Q. Jaleel, Saad A. Mohammed Salih

This research has utilized co2 laser to process silicon (Si3N4) engineering ceramic. Several aspect of laser beam –ceramics intersection can be understood in order to establish  real change in the morphology microstructure, density, hardness, surface toughness and fracture toughness parameter (K1c).This work has succeeded to modify the properties. This has been proved by different test s applied ,e.g., SEM . The most appropriate equation identified for the determination of the fracture toughness parameter K1c among several equation is : K1c=0.016 (E/Hv) 1/2 (P/c3/2).