Surface Tension, Interfacial Segregation, and Graphite Shape in Cast Irons

Using literature data on iron melts, an expression of the surface tension of cast iron melts as a function of temperature and composition was obtained. Its predictions were satisfactorily compared with reported experimental results. Then, an analysis of experimental information of sessile drop exper...

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Bibliographic Details
Published in:Metallurgical and materials transactions. B, Process metallurgy and materials processing science Process metallurgy and materials processing science, 2022-02, Vol.53 (1), p.161-177
Main Authors: Lacaze, J., Dezellus, O.
Format: Article
Language:English
Subjects:
Adhesive strength
Cast iron
Characterization and Evaluation of Materials
Chemical Sciences
Chemistry and Materials Science
Graphite
Material chemistry
Materials Science
Melts
Metallic Materials
Nanotechnology
Original Research Article
Shape effects
Spheroidizing
Structural Materials
Substrates
Sulfur
Surface tension
Surfaces and Interfaces
Thin Films
Trace elements
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Summary:Using literature data on iron melts, an expression of the surface tension of cast iron melts as a function of temperature and composition was obtained. Its predictions were satisfactorily compared with reported experimental results. Then, an analysis of experimental information of sessile drop experiments with cast iron melts onto graphite substrates showed a strong adhesion between these two phases when sulfur is present and its dramatic decrease when the sulfur activity is reduced by the addition of spheroidizers such as Mg and Ce. Finally, analysis and discussion of results on the segregation of impurities and trace elements at the graphite matrix interface in cast irons led to the proposal of a scheme for their effect on graphite shape.
ISSN:1073-5615
1543-1916
DOI:10.1007/s11663-021-02352-x