Thermal Stability and Electrochemical Properties of Ti–Al–Mo–Ni–N Coatings Fabricated by Arc-PVD
— The electrochemical properties of Ti–Al–Mo–Ni–N coatings with a molybdenum content of 20 and 25 at % fabricated by cathodic arc deposition (Arc-PVD) are studied. Series 2 coatings are characterized by the presence of Mo in both a chemically bound (Mo 2 N, as with series 1 coatings) and free states...
Saved in:
Published in | Protection of metals and physical chemistry of surfaces Vol. 56; no. 2; pp. 358 - 362 |
---|---|
Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Moscow
Pleiades Publishing
01.03.2020
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | —
The electrochemical properties of Ti–Al–Mo–Ni–N coatings with a molybdenum content of 20 and 25 at % fabricated by cathodic arc deposition (Arc-PVD) are studied. Series 2 coatings are characterized by the presence of Mo in both a chemically bound (Mo
2
N, as with series 1 coatings) and free states (i.e., metallic phase). Considering the multilayer architecture of coatings based on the mixed nitride (TiAl)N and molybdenum-containing phases, their corrosion destruction proceeds layer by layer due to different corrosion resistance of these phases in acidic and alkaline environments. Annealing the coatings at 600°C in vacuum gives rise to diffusional processes in them that lead to a growth of crystallites of the (TiAl)N nitride phase and a decrease in the microstrain. This phenomenon is considerably more conspicuous in series 2 coatings, which can be explained by the higher diffusivity of Mo atoms in the metallic phase than in the case of their counterparts in the nitride phase. |
---|---|
ISSN: | 2070-2051 2070-206X |
DOI: | 10.1134/S2070205120020057 |