Crystal Structure of Fayalite Fe2SiO4

The relatively large silicon concentration in many TRIP-assisted steels causes the formation of hard, adherent oxides making it difficult to implement surface cleaning prior to hot-rolling. This results in a poor surface finish. The stronger adhesion comes from that fact that the silicon reacts to form Fayalite (Fe2SiO4), which is more coherent with the steel substrate than FeO.

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Fayalite_1
Crystal structure of Fayalite
Fayalite_3
Crystal structure of Fayalite
Fayalite_4
Crystal structure of Fayalite
Fayalite_2
Crystal structure of Fayalite
Fayalite_5
Crystal structure of Fayalite