YOUNGS MODULUS AND STRESS OF CRN DEPOSITED BY CATHODIC VACUUM ARE EVAPORATION

It is generally recognized that a high degree of ionization which is a characteristic of the cathodic vacuum are evaporation (CVAE) process is necessary to form the chromium mononitride in single-phase or near- single-phase condition. This study concerns the properties of CVAE chr omium nitride coatings made at low temperature (200 degrees C) and at a more usual industrial temperature (400 degrees C). A phase analysis is made followed by a derivation of the residual stress. The Young's m odulus of the coating was derived from a series of coatings on various substrates. The modulus value of 232-244 GPa is well below the 400 GP a which is often cited.