Open AccessLow-alloyed molybdenum single crystals: preparation, structure and properties
Author(s) -
Г. С. Бурханов,
V. S. Yusupov,
V. M. Kirillova,
V. V. Sdobyrev,
В. А. Дементьев,
N. A. Dormidontov,
Б. П. Михайлов,
V. A. Ermishkin,
Н. А. Минина
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1347/1/012119
Subject(s) - molybdenum , rod , single crystal , materials science , foil method , fusion , crystallography , zone melting , single stage , thermal expansion , metallurgy , composite material , chemistry , medicine , linguistics , alternative medicine , philosophy , pathology , engineering , aerospace engineering
Investigation concerns the method of preparation of low-alloyed molybdenum single crystals directly from molybdenum rods and wire, rod or foil containing the appropriate alloying metal, excluding the stage of pre-fusion of the components in an arc furnace, which is more economical than traditional method. In this way Mo-W, Mo-Ta (1,5 wt.% alloying elements of each) and Mo-Re (2 and 3 wt.%) single crystals were prepared by electron-beam zone melting. Authors discuss in more detail the structure and structural parameters of prepared single crystals. Some structural features of Mo-2 wt.% Re and Mo-3 wt.% Re single crystals are explained. Moreover the coefficient thermal linear expansion (CTLE) was measured for Mo-Re single crystals. As shown the proposed method ensures the preparation of single crystal even in single stage melt. The structural imperfections may be removed by following re-melting.