TOUGH DIAMONDS AND METHOD OF MAKING THEREOF

摘要

A single crystal diamond grown by microwave plasma chemical vapor deposition has a hardness of 50-90 GPa and a fracture toughness of 11-20 MPa m ^1/2 A method for growing a single crystal diamond includes placing a seed diamond in a holder; and growing single crystal diamond at a temperature of about 1000 °C to about 1100 °C such that the single crystal diamond has a fracture toughness of 11-20 MPa m ^½.