Stabilization of the cubic γ-U structure in U-T alloys (T = Mo, Pt, Nb, Ru, Ti)

• Autorzy: Sowa Sylwia , Kim-Ngan Nhu-Tarnawska Hoa , Krupska-Klimczak Magdalena , Buturlim Volodymyr , Drozdenko Daria , Minarik Peter , Havela Ladislav

Warianty tytułu

PL

Stabilizacja struktury kubicznej γ-U w związkach U-T (T = Mo, Pt, Nb, Ru, Ti)

• Języki publikacji: EN

Abstrakty

EN

We present the results of the stabilization of the γ-U phase with a cubic structure in U-T alloys by means of combined ultrafast cooling (with a cooling rate 106 K/s) and doping with alloying elements in the VI and VIII group (T = Mo, Pt, Nb, Ru, Ti). The X-ray diffraction data have confirmed the cubic structure presented in all U-T alloys with the alloying element content T≥15 at.% (atomic percentage concentration). Some results of the microstructure analysis, phase distribution and orientation of selected samples by using electron backscatter diffraction are also shown.

PL

Zaprezentowaliśmy wyniki stabilizacji fazy γ-U ze strukturą kubiczną w związkach U-T za pomocą techniki ultraszybkiego chłodzenia (z szybkością chłodzenia 106 K/s) oraz domieszkowania pierwiastkami z grup VI i VIII (T= Mo, Pt, Nb, Ru, Ti). Dane dyfrakcji rentgenowskiej potwierdziły obecność kubicznej struktury we wszystkich związkach U-T posiadających zwartość pierwiastków domieszkujących T≥15 at.% (procent atomowy). Wyniki analizy mikrostruktury, rozkładu fazowego i orientacji wybranych próbek zostały również pokazane, używając dyfrakcji wstecznego rozpraszania elektronów.

Słowa kluczowe

EN

crystal structure; cubic γ-U phase; X-ray; EBSD

PL

struktura krystaliczna; kubiczna faza γ-U; X-ray; EBSD

• Wydawca: Wydawnictwo Naukowe Instytutu Technologii Eksploatacji - Państwowego Instytutu Badawczego
• Czasopismo: Journal of Machine Construction and Maintenance - Problemy Eksploatacji
• Rocznik: 2019
• Tom: no. 1
• Strony: 39--46
• Opis fizyczny: Bibliogr. 21 poz., rys., tab.

Twórcy

autor

Sowa Sylwia

• Institute for Sustainable Technologies - National Research Institute, Radom, Poland
• Institute of Physics, Pedagogical University, Cracow, Poland

autor

Kim-Ngan Nhu-Tarnawska Hoa

• Institute of Physics, Pedagogical University, Cracow, Poland

autor

Krupska-Klimczak Magdalena

• Institute of Physics, Pedagogical University, Cracow, Poland

autor

Buturlim Volodymyr

• Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic

autor

Drozdenko Daria

• Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic

autor

Minarik Peter

• Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic

autor

Havela Ladislav

• Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic

Bibliografia

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• 3. Sinha V.P., Hegde P.V., Prasad G.J., Dey G.K., Kamath H.S.: Phase transformation of metastable cubic γ-U phase in U-Mo alloys. Journal of Alloys and Compounds, 2010, 506(1), pp. 253-262.
• 4. Ewh A., Perez E., Keiser D., Jr D., Sohn Y.H.: Microstructural Characterization of U-Nb-Zr, U-Mo-Nb and U-Mo-Ti Alloys via Electron Microscopy. Journal of Phase Equilibria and Diffusion, 2010, 31(3), pp. 216-222.
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• 11. Tkach I., Kim-Ngan N.-T.H., Maskova S., Dzevenko M., Havela L., Warren A.D., Havela L., Sitt C., Scott T.B.: Characterization of cubic γ-phase uranium molybdenum alloys synthesized by ultrafast cooling, Journal of Alloys and Compounds, 2012, 534, pp.101-109.
• 12. Kim-Ngan N.-T.H., Tkach I., Maskova S., Goncalves A.P., Havela L.: Study of decomposition and stabilization of splat-cooled cubic -U phase U-Mo alloys. Journal Alloys and Compounds, 2013, 580, pp. 223-231.
• 13. Kim-Ngan N.-T.H., Paukov M., Sowa S., Krupska M., Tkach I., Havela L.: Structure and superconducting transition in splat-cooled U-T alloys. Journal of Alloys and Compounds, 2015, 645, pp. 158-163.
• 14. Krupska M., Kim-Ngan N.-T.H., Sowa S., Paukov M., Tkach I., Drozdenko D., Havela L., Tarnawski Z.: Structure, Electrical Resistivity and Superconductivity of Low-alloyed γ-U Phase Retained to Low Temperatures by Means of Rapid Cooling. Acta Metalurgica Sinica (English Letter), 2016, 29(4), pp. 388-398.
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• 17. Hills R.F., Howlett B.W., Butcher B.R., Steward D.: The effect of cooling rate on the decomposition of the γ-phase in uranium-zirconium alloys. Journal of Nuclear Materials, 1965, 16(1), pp.109-128.
• 18. Sowa S., Kim-Ngan N.-T.H., Krupska M., Paukov M., Buturlim V., Havela L.: Structure and properties of U alloys with selected d-metals and their hydrides. Physica B: Condensed Matter, 2018, 536, pp. 546-552.
• 19. Kim-Ngan N.-T.H., Havela L., Paukov M., Drozdenko D., Minarik P., Chrobak M., Tarnawski Z., Sowa S., Krupska M., Duda A.: Superconductivity in U-Pt system with low Pt concentrations (≤15at.%). Physica C: Superconductivity and its Applications, 2018, 546, pp. 76-83.
• 20. Kim-Ngan N.-T.H., Tarnawski Z., Chrobak M., Sowa S., Duda A., Paukov M., Buturlim V., Havela L.: Superconducting phase transitions in mK temperature range in splat-cooled U0.85Pt0.15alloys. Physica B: Condensed Matter, 2018, 536, pp. 708-712.
• 21. Kim-Ngan N.-T.H., Sowa S., Krupska M., Paukov M., Drozdenko D., Minarik P., Havela L.: Superconductivity in U-Nb alloys with γ-U phase and ferromagnetism of their hydrides. Physica B: Condensed Matter, 2018, 545, pp. 152-158.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).