TY - JOUR

T1 - Cyclic Solid-Liquid Phase Transformations in the CaO – SiO 2 System—Experiments and Modelling

AU - Ogris, Daniel

AU - Kircher, Volkmar

AU - Gamsjäger, Ernst

N1 - Publisher Copyright: © 2023, The Author(s).

PY - 2023/4/19

Y1 - 2023/4/19

N2 - The cyclic growth and shrinkage of solid oxides (i.e. wollastonite) in CaO–SiO2-based slags is investigated in-situ by means of High-Temperature Confocal Scanning Laser Microscopy (HT-CSLM). The compositions of the slags are carefully selected to induce different phase transformation conditions, i.e. congruent and incongruent melting/solidification. To complement the experimental results, the kinetics of growth and shrinkage of oxide crystals is investigated by means of a sharp interface model where the interfacial reaction and diffusion in the liquid bulk are considered as possible rate-controlling processes. The modelling approach combined with data analysis from key experiments reveals the underlying dissipative processes of solidification and melting phenomena, here, diffusion in the liquid bulk material and/or the interfacial reactions. The modelling approach is likely to be applicable for future materials design and processing problems from this perspective.

AB - The cyclic growth and shrinkage of solid oxides (i.e. wollastonite) in CaO–SiO2-based slags is investigated in-situ by means of High-Temperature Confocal Scanning Laser Microscopy (HT-CSLM). The compositions of the slags are carefully selected to induce different phase transformation conditions, i.e. congruent and incongruent melting/solidification. To complement the experimental results, the kinetics of growth and shrinkage of oxide crystals is investigated by means of a sharp interface model where the interfacial reaction and diffusion in the liquid bulk are considered as possible rate-controlling processes. The modelling approach combined with data analysis from key experiments reveals the underlying dissipative processes of solidification and melting phenomena, here, diffusion in the liquid bulk material and/or the interfacial reactions. The modelling approach is likely to be applicable for future materials design and processing problems from this perspective.

UR - http://www.scopus.com/inward/record.url?scp=85153107598&partnerID=8YFLogxK

U2 - 10.1007/s11663-023-02783-8

DO - 10.1007/s11663-023-02783-8

M3 - Article

AN - SCOPUS:85153107598

VL - 54.2023

SP - 1555

EP - 1564

JO - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science

JF - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science

SN - 1073-5615

IS - June

ER -