About: Study of microsegregations of alloying elements in tungsten and molybdenum single crystals during the electron beam zone melting     Goto   Sponge   NotDistinct   Permalink

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  • The growth of single crystals from melts may be accompanied by creating a sequence of structural imperfections in the solid phase which is given by the conditions of crystallization and the crystal chemical composition. A periodical variation of the crystallization rate happens under certain conditions of the heat and mass transfer, which leads to a variation of the character of distribution of admixtures in the volume of the growing single crystal and its substructure. An accumulation of admixtures in front of the crystallization boundary and increasing of the crystallization undercooling may cause a considerable rise of the speed of movement of the crystallization front and changes of the admixture occupation in the growing crystal on the phase boundary surface. The variation of the microscopic crystallization rate causes a creation of a band structure observed on longitudinal sections of single crystals. This phenomenon was observed in single crystals in the area of solid solutions of low-alloyed W
  • The growth of single crystals from melts may be accompanied by creating a sequence of structural imperfections in the solid phase which is given by the conditions of crystallization and the crystal chemical composition. A periodical variation of the crystallization rate happens under certain conditions of the heat and mass transfer, which leads to a variation of the character of distribution of admixtures in the volume of the growing single crystal and its substructure. An accumulation of admixtures in front of the crystallization boundary and increasing of the crystallization undercooling may cause a considerable rise of the speed of movement of the crystallization front and changes of the admixture occupation in the growing crystal on the phase boundary surface. The variation of the microscopic crystallization rate causes a creation of a band structure observed on longitudinal sections of single crystals. This phenomenon was observed in single crystals in the area of solid solutions of low-alloyed W (en)
  • Růst monokrystalů z tavenin může být doprovázen vznikem posloupností strukturních nedokonalostí v tuhé fázi, která je dána podmínkami krystalizace a chemického složení v krystalu. Při určitých podmínkách přenosu tepla a hmoty dochází k periodickému kolísání rychlosti krystalizace, což vede k změně charakteru rozdělování příměsí v objemu rostoucího monokrystalu a k změně jeho substruktury. Nahromadění příměsí před frontou krystalizace a zvětšení stupně koncentračního přechlazení může způsobit značný vzrůst rychlosti pohybu fronty krystalizace a změny v obsazení příměsí rostoucím krystalem na povrchu fázové hranice. Kolísání mikroskopické rychlosti krystalizace způsobuje vznik pásové struktury, pozorované na podélných řezech monokrystalů. Tento jev byl pozorován u monokrystalů v oblasti tuhých roztoků nízkolegovaných slitin W - Ta a Mo - Ta , připravených metodou elektronového zonálního tavení (metoda FZ). (cs)
Title
  • Study of microsegregations of alloying elements in tungsten and molybdenum single crystals during the electron beam zone melting
  • Studium mikrosegregací legujících prvků ve wolframu a molybdenu během elektronového zonálního tavení (cs)
  • Study of microsegregations of alloying elements in tungsten and molybdenum single crystals during the electron beam zone melting (en)
skos:prefLabel
  • Study of microsegregations of alloying elements in tungsten and molybdenum single crystals during the electron beam zone melting
  • Studium mikrosegregací legujících prvků ve wolframu a molybdenu během elektronového zonálního tavení (cs)
  • Study of microsegregations of alloying elements in tungsten and molybdenum single crystals during the electron beam zone melting (en)
skos:notation
  • RIV/61989100:27360/06:00014342!RIV07-MSM-27360___
http://linked.open.../vavai/riv/strany
  • 14-15
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • Z(MSM6198910013)
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 502284
http://linked.open...ai/riv/idVysledku
  • RIV/61989100:27360/06:00014342
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • Single crystals; molybdenum; tantalum; tungsten; electron beam floating zone melting; microsegregation (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...ontrolniKodProRIV
  • [D3F79E960198]
http://linked.open...i/riv/mistoVydani
  • Praha
http://linked.open...i/riv/nazevZdroje
  • Development of Materials Science in Research and Education
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...UplatneniVysledku
http://linked.open...iv/tvurceVysledku
  • Drápala, Jaromír
  • Bujnošková, Kateřina
  • Babnič, Pavel
http://linked.open...n/vavai/riv/zamer
number of pages
http://purl.org/ne...btex#hasPublisher
  • Czech and Slovak Crystallographic Association Praha
https://schema.org/isbn
  • 80-901748-7-6
http://localhost/t...ganizacniJednotka
  • 27360
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