Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5348501 | Applied Surface Science | 2016 | 11 Pages |
Abstract
This work represents the results of research on thermal stability, oxidation resistance at temperatures of up to 800 °C and electrochemical behaviour of (Ti,Al)N-(â¼3 at.%)Cu and (Ti,Al)N-(â¼8 at.%)Ni nanocrystalline coatings in acidic and alkaline media. The coatings were deposited by the arc-PVD method with a thickness of approximately 4 μm and crystallite size of less than 20 nm. It has been demonstrated that the composition and properties of the coating structures do not change when the coatings are heated in 10â4 Pa vacuum at temperatures of 600, 700 °C for 1.5 h. Heating up to 800 °C caused an increase of crystallite size and reduction microstrain in the crystal lattice of the ceramic phase. The process is accompanied by deterioration of the coating hardness from 48 to 52 to 33-36 GPa. The (Ti,Al)N-Cu and (Ti,Al)N-Ni metal-ceramic nanostructured coatings are characterized by heat resistance up to the temperatures of 700 and 800 °С respectively. The coatings under study have tendency for self-passivation and resistance to pitting corrosion.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
D.S. Belov, I.V. Blinkov, A.O. Volkhonskii, D.V. Kuznetsov, F.V. Kiryukhantsev-Korneev, Yu. A. Pustov, V.S. Sergevnin,