Tytuł artykułu
Autorzy
Wybrane pełne teksty z tego czasopisma
Identyfikatory
Warianty tytułu
Konferencja
International Conference on Modelling in Mechatronics (9 ; 02-04.09.2004 ; Kazimierz Dolny, Poland)
Języki publikacji
Abstrakty
The convection caused by the temperature and concentration gradients can lead to the creation of microinhomogeneities such as growth cores, striations and cellular structure. Low-alloyed single crystals of W-Ir, Mo-Ir and Mo-Re alloys were prepared by electron beam zone melting applying three zone pass rates: 3, 5 and 1 mm/min. The Electron Microprobe Analysis by Wavelength Dispersive X-ray Spectrometry (Vitkovice - Research and Development Ltd., Ostrava, Cz) and the Instrumental Neutron Activation Analysis (Institute of Nuclear Research, Rez, CZ) were used for the evaluation of admixture distribution on longitudinal sections of specimens. On the basis of chemical analysis, the striations in these single crystals characterized by the sinusoidal wave of concentration profiles were found. Effective distribution coefficients of Re and Ir in molybdenum and tungsten were determined.
Słowa kluczowe
Czasopismo
Rocznik
Tom
Strony
69--75
Opis fizyczny
Bibliogr. 8 poz.
Twórcy
autor
- VŠB - Technical University of Ostrava, Department of Non-ferrous Metals, Refining and Recycling
autor
- VŠB - Technical University of Ostrava, Department of Non-ferrous Metals, Refining and Recycling
Bibliografia
- [1] Duži, P., 1972, Rozdělovani Ir192 v molybdenu při ełektronovém pásmovém taveni. Aspirantská disertačni práce, VŠB Ostrava.
- [2] Děvjatych, G.G., Burchanov, G.S., 1993, Yysokočistyje tugoplavkije i redkije metally. Moskva, Nauka.
- [3] Kuchař, L., Drápala, J., 2000, Metalurgie čistých kovů. Metody rafmace čistých látek. Nadácia R. Kammela, Košice.
- [4] Hein, K., Buhrig, E., Kuchař, L., Barthel, J., 1983, Kristallisation aus Schmelzen. Leipzig, VEB Deutscher Verlag für Grundstoffindustrie.
- [5] Kuchař, L. et al., 1984, Makrosegregation, Mikrosegregation und Substruktur in zonengeschmolzenem Molybdän, in: Sbornlk vědeckých praci Vysoké školy báňské v Ostravé, řada hutnická, VŚB Ostrava, 43-52.
- [6] Bujnošková, K., Drápala, J., Forming and technological processing of single crystals on the base of tungsten and molybdenum, in: Development of Materials Science in Research and Education, Praha: MAXDORF, s.r.o. 80-85912-85-8.
- [7] SGTE Date for Pure Elements, NPL Reports DMA (A), 195, 1989. Binary Alloy Phase Diagrams ASM International Materials Park, Ohio, 1996.
- [8] Elliot, R.P., 1965, Constitution of binary alloys, New York, McGraw-Hill.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BWA2-0008-0216