Interaction of barium oxyfluorochloride melts with refractories based on aluminum and magnesium oxides

The contact surface of oxyfluorochloride melts containing 20–40 wt % BaO with Al 2 O 3 , MgO, or MgO · Al 2 O 3 ceramics is studied by laser emission microspectral analysis in the course of melting of complexly alloyed nickel alloys in vacuo. The distribution profiles of barium in a crucible materia...

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Bibliographic Details
Published in:Russian metallurgy Metally 2014-11, Vol.2014 (11), p.861-864
Main Authors: Burtsev, V. T., Sidorov, V. V., Rigin, V. E.
Format: Article
Language:English
Subjects:
Aluminum base alloys
Aluminum oxide
Ceramics
Chemistry and Materials Science
Contact melting
Crucibles
Magnesium oxide
Materials Science
Melts
Metallic Materials
Metallurgy
Nickel base alloys
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Summary:The contact surface of oxyfluorochloride melts containing 20–40 wt % BaO with Al 2 O 3 , MgO, or MgO · Al 2 O 3 ceramics is studied by laser emission microspectral analysis in the course of melting of complexly alloyed nickel alloys in vacuo. The distribution profiles of barium in a crucible material are determined at different chemical compositions of a slag and ceramics to a depth of 800 μm. The diffusion coefficient of barium D Ba is calculated and ranges from 0.45 × 10 −5 to 5.8 × 10 −5 cm 2 /s. A tendency for increasing D Ba in experiments with the Al 2 O 3 ceramics and an insignificant decrease of D Ba in experiments with ceramics of another composition is observed with an increase in the weight fraction of BaO (to 40 wt %).
ISSN:0036-0295
1555-6255
1531-8648
DOI:10.1134/S0036029514110056