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| rdf:type
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| Description
| - The investigation concerned the method of preparation of single crystal ingots of low-alloyed alloys on the base of tungsten and molybdenum directly from tungsten and molybdenum rods and wires of appropriate alloying metals, excluding the stage of pre-fusion of the components in an arc furnace, which is more economical than the traditional method. In this way ingots were prepared from the following alloys of binary systems: W–Mo, W–Ta, Mo–W, Mo–Nb, Mo–Ta, the content of the above alloying elements was about 1.5 wt.% each. The preparation of source material and modes of plasma-arc melting (for single crystals of alloys on the base of tungsten) and electron beam zone melting (for single crystals of alloys on the base of molybdenum) is described. Structural parameters and perfectness of the obtained single crystals were investigated using X-ray topography, the back-reflection Laue method and light optical microscopy. It was found out that the efficient removal of carbon (by 2 orders of magnitude) from single crystals of molybdenum grown by electron beam method and particularly of tungsten, took place even after a single plasma-arc re-melting. The structure of ingots consists of large blocks with relatively high disorientation of sub-boundaries of the 1st order. During the growth from the beginning to the top of the ingot the blocks got crushed. It was established that the conditions of this experiment, even in case of a single re-melting, ensure obtaining of alloys with single-crystalline structure, where the crystal imperfectness can be eliminated by further re-melts.
- The investigation concerned the method of preparation of single crystal ingots of low-alloyed alloys on the base of tungsten and molybdenum directly from tungsten and molybdenum rods and wires of appropriate alloying metals, excluding the stage of pre-fusion of the components in an arc furnace, which is more economical than the traditional method. In this way ingots were prepared from the following alloys of binary systems: W–Mo, W–Ta, Mo–W, Mo–Nb, Mo–Ta, the content of the above alloying elements was about 1.5 wt.% each. The preparation of source material and modes of plasma-arc melting (for single crystals of alloys on the base of tungsten) and electron beam zone melting (for single crystals of alloys on the base of molybdenum) is described. Structural parameters and perfectness of the obtained single crystals were investigated using X-ray topography, the back-reflection Laue method and light optical microscopy. It was found out that the efficient removal of carbon (by 2 orders of magnitude) from single crystals of molybdenum grown by electron beam method and particularly of tungsten, took place even after a single plasma-arc re-melting. The structure of ingots consists of large blocks with relatively high disorientation of sub-boundaries of the 1st order. During the growth from the beginning to the top of the ingot the blocks got crushed. It was established that the conditions of this experiment, even in case of a single re-melting, ensure obtaining of alloys with single-crystalline structure, where the crystal imperfectness can be eliminated by further re-melts. (en)
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| Title
| - Preparation and investigation of structural parameters of single crystals of low-alloyed alloys on the base of tungsten and molybdenum
- Preparation and investigation of structural parameters of single crystals of low-alloyed alloys on the base of tungsten and molybdenum (en)
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| skos:prefLabel
| - Preparation and investigation of structural parameters of single crystals of low-alloyed alloys on the base of tungsten and molybdenum
- Preparation and investigation of structural parameters of single crystals of low-alloyed alloys on the base of tungsten and molybdenum (en)
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| skos:notation
| - RIV/61989100:27360/13:86088441!RIV14-MSM-27360___
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/61989100:27360/13:86088441
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - x-ray topography; EBFZM; single crystals; molybdenum; tungsten (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
| - DE - Spolková republika Německo
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
| - Advanced Engineering Materials
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Drápala, Jaromír
- Burkhanov, G. S.
- Skotnicová, Kateřina
- Kirillova, V. M.
- Abramov, N. N.
- Dementyev, V. A.
- Kuz'mishev, V. A.
- Sdobyrev, V. V.
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| issn
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| number of pages
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| http://localhost/t...ganizacniJednotka
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