| Autor: |
Semin, V. O., Gudimova, E. Yu., Neiman, A. A., Mukhamedova, R. R., Meisner, L. L., Panin, Victor E, Fomin, Vasily M |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2020, Vol. 2310 Issue 1, p1-4, 4p |
| Abstrakt: |
Metallic glasses (MGs) formed by ultrafast quenching of the melt have wide practical applications due to their high strength, soft magnetic and corrosion properties. Due to the fact that glass-forming conditions are highly nonequilibrium, the issues related to the thermal stability of the amorphous phase and structural relaxation prior to crystallization are of great importance in the "amorphous phase–crystal" phase transformation theory. To reveal the crystallization behavior of the amorphous phase, a Ti-Ni-Ta surface alloy (SA), formed on a TiNi substrate through liquid-phase mixing of the system [Ti70Ta30 at % film/substrate TiNi] using a low-energy high-current electron beam, was investigated. It was found that the amorphous phase in the Ti-Ni-Ta SA subjected to annealing at the elevated temperature (up to T = 773 K) exhibited high thermal stability. An amorphous structure with embedded nanobubbles was preserved in the sublayer of the SA after annealing at T = 673 K, and nanocrystalline particles of the {α″ + β}(Ti, Ta) phases and intermetallic Ti2Ni were found. TEM studies revealed that the annealing at T = 773 K led to the devitrification of the amorphous phase in the Ti-Ni-Ta SA accompanied by a nanocomposite structure formation with nanocrystals of dendritic and eutectic morphology. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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