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Phase transformation in bio-compatible Mg-based alloys
Hornát, Bohumil ; Vlach, Martin (advisor) ; Mathis, Kristián (referee)
ÙÖÖ ÒØ Ñ Ø Ö Ð Ö × Ö × Ó Ò Ò ÑÔÖÓÚ Ò Ú ÓÖ Ó Ð ØÛ Ø Ñ ¹ Ò × ÙÑ ÐÐÓÝ Û Ú Û Ù× ×Ô ÐÐÝ Ò ØÖ Ò×ÔÓÖØ Ò Ù×ØÖÝ Ò Ñ ¹ Ò ž Å ¹Ê ¹Ë ¹ÅÒ × ÐÐÓÝ× Ò ÓÒ× Ö × ÔÖÓÑ × Ò Ñ Ø Ö Ð ÓÖ Ø × ÔÔÐ Ø ÓÒמ ÁÒ Ø ÔÖ × ÒØ ÛÓÖ ¸ Ø Ö Û × ×ØÙ Ø ÖÑ Ð ÚÓÐÙØ ÓÒ Ó Ø Ô × ØÖ Ò× ÓÖÑ Ø ÓÒ× Ò Å ¹Ê ¹Ë ¹ÅÒ × ÐÐÓÝ× Ý Ö ÒØ Ð × ÒÒ Ò ÐÓ¹ Ö Ñ ØÖÝ Ò Ñ ×ÙÖ Ò Ñ ÖÓ Ö Ò ×מ Ì Ø ÖÑ Ð Ö ×ÔÓÒ× × Ø Ö ÒØ Ø Ò Ö Ø × Û Ö Ó × ÖÚ Ò Ø Ø Ú Ø ÓÒ Ò Ö × Ó Ø ÔÖÓ ×× × Û Ö Ð ÙÐ Ø ž Ì Ø ÖÑ Ð Ö ×ÔÓÒ× × Û Ö ××Ó Ø Û Ø Ò Ú Ù Ð ÔÖ Ô Ø Ø ÓÒ ÓÖ ×ÓÐÚ ÒØ ÔÖÓ ×× × × ÓÒ ÓÑÔ Ö ×ÓÒ Û Ø Ð Ø Ö ØÙÖ ž ÈÖ Ô Ø Ø ÓÒ × ÕÙ Ò Ó ×Ý×Ø Ñ Å ¹ Û Ö Ó × ÖÚ Ò Ñ Ø Ö Ð× Å ½Ë ½ÅÒ Ò Å ½¼ ½Ë ½ÅÒž ÈÖ ¹ Ô Ø Ø ÓÒ × ÕÙ Ò Ó ×Ý×Ø Ñ Å ¹ Û Ö Ó × ÖÚ Ò Ø Ñ Ø Ö Ð Å ½Ë ½ÅÒž ÈÖ Ô Ø Ø ÓÒ Ó Ô ÖØ Ð × ÅÒ¾Ë Ò Ô ÖØ Ð × ÓÒØ Ò Ò ÅÒ Ò Ê Û Ö Ø ¹ Ø Ò ×ØÙ ÐÐÓÝמ À Ö Ò Ò Û Ö ÒÓØ Ó × ÖÚ Ò Ú ÖØ Ð ×× Ø Ö Û Ö ÒÓØ × Ò ÒØ Ö × × Ó Ö Ò ×× Ò Ø ÙÖ Ò ÒÒ Ð Ò ÙÔ ØÓ ½¼ ž
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Phase transformation in bio-compatible Mg-based alloys
Hornát, Bohumil ; Vlach, Martin (advisor) ; Mathis, Kristián (referee)
ÙÖÖ ÒØ Ñ Ø Ö Ð Ö × Ö × Ó Ò Ò ÑÔÖÓÚ Ò Ú ÓÖ Ó Ð ØÛ Ø Ñ ¹ Ò × ÙÑ ÐÐÓÝ Û Ú Û Ù× ×Ô ÐÐÝ Ò ØÖ Ò×ÔÓÖØ Ò Ù×ØÖÝ Ò Ñ ¹ Ò ž Å ¹Ê ¹Ë ¹ÅÒ × ÐÐÓÝ× Ò ÓÒ× Ö × ÔÖÓÑ × Ò Ñ Ø Ö Ð ÓÖ Ø × ÔÔÐ Ø ÓÒמ ÁÒ Ø ÔÖ × ÒØ ÛÓÖ ¸ Ø Ö Û × ×ØÙ Ø ÖÑ Ð ÚÓÐÙØ ÓÒ Ó Ø Ô × ØÖ Ò× ÓÖÑ Ø ÓÒ× Ò Å ¹Ê ¹Ë ¹ÅÒ × ÐÐÓÝ× Ý Ö ÒØ Ð × ÒÒ Ò ÐÓ¹ Ö Ñ ØÖÝ Ò Ñ ×ÙÖ Ò Ñ ÖÓ Ö Ò ×מ Ì Ø ÖÑ Ð Ö ×ÔÓÒ× × Ø Ö ÒØ Ø Ò Ö Ø × Û Ö Ó × ÖÚ Ò Ø Ø Ú Ø ÓÒ Ò Ö × Ó Ø ÔÖÓ ×× × Û Ö Ð ÙÐ Ø ž Ì Ø ÖÑ Ð Ö ×ÔÓÒ× × Û Ö ××Ó Ø Û Ø Ò Ú Ù Ð ÔÖ Ô Ø Ø ÓÒ ÓÖ ×ÓÐÚ ÒØ ÔÖÓ ×× × × ÓÒ ÓÑÔ Ö ×ÓÒ Û Ø Ð Ø Ö ØÙÖ ž ÈÖ Ô Ø Ø ÓÒ × ÕÙ Ò Ó ×Ý×Ø Ñ Å ¹ Û Ö Ó × ÖÚ Ò Ñ Ø Ö Ð× Å ½Ë ½ÅÒ Ò Å ½¼ ½Ë ½ÅÒž ÈÖ ¹ Ô Ø Ø ÓÒ × ÕÙ Ò Ó ×Ý×Ø Ñ Å ¹ Û Ö Ó × ÖÚ Ò Ø Ñ Ø Ö Ð Å ½Ë ½ÅÒž ÈÖ Ô Ø Ø ÓÒ Ó Ô ÖØ Ð × ÅÒ¾Ë Ò Ô ÖØ Ð × ÓÒØ Ò Ò ÅÒ Ò Ê Û Ö Ø ¹ Ø Ò ×ØÙ ÐÐÓÝמ À Ö Ò Ò Û Ö ÒÓØ Ó × ÖÚ Ò Ú ÖØ Ð ×× Ø Ö Û Ö ÒÓØ × Ò ÒØ Ö × × Ó Ö Ò ×× Ò Ø ÙÖ Ò ÒÒ Ð Ò ÙÔ ØÓ ½¼ ž
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Influence of minor solutes on thermal properties of MgYNd-based alloys
Kodetová, Veronika ; Vlach, Martin (advisor) ; Kekule, Tomáš (referee)
The development of magnesium alloys has the growing trend and leads mainly to the transport industry and modern medicine. The use of the alloying elements, especially rare- earth elements, is a way to improve the material utility. In the present work, there was studied thermal evolution of the phase transformations in the MgYNd alloys containing additional elements by differential scanning calorimetry. The thermal responses at different heating rates were observed and the activation energies of the processes were calculated. On the basis of confrontation with literature the precipitation and dissolution of stable, metastable phases were assigned to the observed processes. The thermal response corresponding to the precipitation of the stable β phase was observed in all materials. The activation energies of the stable β phase precipitation are practically identical for all materials investigated.
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Structure and magnetic properties of f-electron compounds and their hydrides
Mašková, Silvie ; Havela, Ladislav (advisor) ; Kamarád, Jiří (referee) ; Reiffers, Marián (referee)
Title: Structure and magnetic properties of f-electron compounds and their hydrides Author: Silvie Mašková Department: Deparment of Condensed Matter Physics Supervisor: Doc. RNDr. Ladislav Havela, CSc., Deparment of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Prague, The Czech Republic Abstract: Magnetic properties were studied in several types of actinide- and lanthanide-based ternary compounds. We have shown indirect that anisotropy of compressibility and thermal expansion can be related to the direction of magnetic moments at U-compounds with "soft" directions (where the closest U-U links are) perpendicular to the moments direction. Comparison of U and RE compounds of the 2-2-1 type indicates that contrary to U compounds, RE compounds can absorb much more hydrogen. The involvement of the f-states in metallic bond, which takes place at actinides and not in lanthanides, makes the U-based compounds apparently more stable against hydrogenation. Basic electronic properties were established for ζ -Pu19Os, which is a close analogy to β-Pu, and for its low-temperature variety η -Pu19Os. The results confirm that the volume is not the main parameter driving Pu properties, as β-Pu with intermediate volume is the most strongly correlated Pu phase. Keywords: uranium compounds,...
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