The development of ceramic coating to metals was stimulated by the need for high temperature, wear and corrosion resistant materials. Recently TiN, TiC, TiB
2, and Al
2O
3 are used as ceramic coating materials.
In the present study, the X-ray method was successfully applied to measure the residual stress distribution in TiN, TiC, TiB
2, and Al
2O
3 coated steels. The X-ray elastic constants were determined and compared with the mechanically measured values.
In all ceramic coated films, the X-ray elastic constants were larger than the mechanical ones.
Residual stress distributions of. TiN and TiC coated films were determined by the X-ray method. It indicated high compressive stress above -2.5(GPa) to -3.5(GPa) in the TiN and TiC coated films.
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