STRUCTURAL STABILITY OF Ti-N AND Zr-N COATINGS AT EMISSION TESTS IN MODE OF PULSES

In this work, stability of titanium and zirconium nitride coatings deposited on steel and molybdenum was studied. The phase composition of nitride coatings was studied by X-ray method before and after emission testing in the nanosecond range of pulses. It was noted that before the testing, the titanium nitride coating was a successive alternation of α-Ti, Ti2N, and TiN layers. After the testing, titanium was transformed into the β-phase (bcc), nitrogen was partially evaporated, and a new phase, presumably Ti3N, with a tetragonal lattice was formed in a significant content. The Zr-N coating, obtained in the form of zirconium mono-nitride, showed structural stability during testing.