Physical-Mechanical Properties of Superhard Nanocomposite Coatings on Base Zr-Ti-Si-N
| Autor: | Alexandr POGREBNJAK, Viacheslav BAIDAK, Vyacheslav BERESNEV, Petr TURBIN, Nemat MAKHMUDOV, Maxim IL’YASHENKO, Dmitrii KOLESNIKOV, Mannab TASHMETOV |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Medžiagotyra, Vol 19, Iss 2, Pp 140-143 (2013) |
| Druh dokumentu: | article |
| ISSN: | 1392-1320 2029-7289 |
| DOI: | 10.5755/j01.ms.19.2.4429 |
| Popis: | Hard and super hard coatings of Zr-Ti-Si-N of from 2.8 μm to 3.5 μm thickness were fabricated using a vacuum arc source with high frequency stimulation. The samples were annealed in vacuum and in air at 1200 °C. It was found that films with a high Zr and Ti content were thermally stable up to 1180 °C. At the same time, a thin oxide layer of 180 nm to 240 nm was found on the surfaces, which protected the sample from destruction. Below 1000 °C annealing temperature in vacuum, changing of phase composition is determined by appearing of siliconitride crystallites (ß-Si3N4) with hexagonal crystalline lattice and by formation of ZrO2 oxide crystallites. Size of grains of a substitution solid solution (Zr, Ti)N varied from (10 – 12) nm to 25 nm, but Ti concentration in the solid solution increased. In the process of annealing, hardness of the best series of samples increased from (39.6 ±1.4) GPa to 53.6 GPa, which seemed to indicate that a spinodal segregation along grain interfaces was finished.DOI: http://dx.doi.org/10.5755/j01.ms.19.2.4429 |
| Databáze: | Directory of Open Access Journals |
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