Highly Damping Hard Coatings for Protection of Titanium Blades

摘要

Sn-Cr-MgO system is used as an example to show the basic capability to produce by EBPVD protective metal-ceramic coatings with a high adhesion strength, high values of hardness and damping capacity on the surface of titanium alloys at substrate temperatures not higher than 400 degrees C. After deposition of such coatings on the surface of titanium samples their endurance limit is preserved. It allows these coatings to be regarded as promising in terms of extending the service life of titanium blades. The paper deals with the features of coating structure ensuring their unusual combination of mechanical properties, and presents model concepts of the possible mechanisms of vibration energy dissipation in them.