The growth of single crystals of Ni-W alloy under conditions of high temperature gradient
| Autor: | G. P. Kovtun, T.Yu. Rudycheva, A. N. Ladygin, V. V. Klochikhin, V. Ya. Sverdlov, P. D. Zhemanyuk, V. M. Azhazha, Yu.V. Gorbenko, D. G. Malykhin, A. P. Shcherban |
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| Rok vydání: | 2004 |
| Předmět: |
Materials science
Alloy Front (oceanography) Physics::Optics General Chemistry engineering.material Condensed Matter Physics law.invention Temperature gradient Crystallography law Condensed Matter::Superconductivity engineering General Materials Science Nickel alloy Composite material Crystallization |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 1562-689X 1063-7745 |
| DOI: | 10.1134/1.1690436 |
| Popis: | The structure of single crystals of the NV-4 nickel alloy containing 32–36 wt % W is investigated. The temperature gradient at the crystallization front and the velocity of the crystallization front are the variable parameters of directional crystallization. The degrees of structural perfection of the single crystals grown under different conditions are compared. The crystallization parameters providing growth of single crystals that have high structural perfection and can be successfully used as seeds for the growth of single-crystal blades are determined. Typical defects formed upon directional crystallization of single crystals of the Ni-W (35 wt %) alloy are examined. The studied defects are classified, and the factors responsible for the disturbance of the single-crystal structure are analyzed. |
| Databáze: | OpenAIRE |
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