Formation of Titanium Interlayer by Vacuum Arc Deposition to Increase the Durability of Titanium Nitride Coatings under Thermal Cycling Conditions

摘要

It is found that the formation of a titanium interlayer between a zirconium alloy doped with niobium (Zr–1% Nb) and a magnetron-sputtered titanium nitride coating by means of cathodic vacuum arc increases the adhesion strength of titanium nitride. Titanium nitride coatings have a NaCl-type cubic lattice and are mainly oriented parallel to the (100) plane. Upon thermal cycling in the temperature range of 20– 800°C, the structure of the titanium interlayer transforms from α phase to β phase. Ti–TiN coatings are stable upon thermal cycling in the temperature range of 20–800°C. The deposition of a titanium interlayer does not increase the hydrogen permeability of titanium nitride.