Interaction of Lantanum and Cerium with Oxygen and Sulfur in Nickel Melts at PAr = 0.1 MPa

The method of instant EMF fixation has been used to determine the activity of oxygen in model Ni melts containing up to 0.001–0.20 wt % La and Ce. It is shown that, at P Ar = 0.1 MPa and 1560°C, when cerium is introduced into the melt, the oxygen activity is 4.7 times lower than when deoxidizing wit...

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Bibliographic Details
Published in:Inorganic materials : applied research 2021, Vol.12 (3), p.836-841
Main Authors: Burtsev, V. T., Chabina, E. B., Sidorov, V. V.
Format: Article
Language:English
Subjects:
Bonding strength
Cerium
Chemistry
Chemistry and Materials Science
Deoxidizing
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Lanthanum
Materials Science
Melts
New Methods of Treatment and Production of Materials with Required Properties
Nickel
Nonmetallic inclusions
Oxygen
Sulfur
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Summary:The method of instant EMF fixation has been used to determine the activity of oxygen in model Ni melts containing up to 0.001–0.20 wt % La and Ce. It is shown that, at P Ar = 0.1 MPa and 1560°C, when cerium is introduced into the melt, the oxygen activity is 4.7 times lower than when deoxidizing with lanthanum. SEM investigation shows that the composition of nonmetallic inclusions in molten Ni deoxidized by La and Ce indicates a stronger bonding of Ce with oxygen than with La and a stronger bonding of La with sulfur than with Ce.
ISSN:2075-1133
2075-115X
DOI:10.1134/S2075113321030059