Acta Metallurgica Sinica (English Letters) >
Glass ceramic of high hardness and fracture toughness developed from iron-rich wastes
A study has been carried out on the feasibility of using high iron content wastes, generated during steel making, as a raw material for the production of glass ceramic. The iron-rich wastes were mixed and melted in different proportions with soda-lime glass cullet and sand. The devitrification of the parent glasses produced from the different mixtures was investigated using differential thermal analysis, X-ray diffraction, and scanning electron microscopy. The mechanical properties of the glass-ceramic were assessed by hardness and indentation fracture toughness measurement. A glass ceramic with mixture of 60 wt pct iron-rich wastes, 25 wt pct sand, and 15 wtpct glass cullet exhibited the best combination of properties, namely, hardness 7.9 GPa and fracture toughness 3.75 MPa.m1/2, for the sake of containing magnetite in marked dendritic morphology. These new hard glass ceramics are candidate materials for wear resistant tiles and paving for heavy industrial floors.
Key words： Iron-rich wastes; Glass ceramics; Vitrification; Hardness
Weixin HAN . Glass ceramic of high hardness and fracture toughness developed from iron-rich wastes[J]. Acta Metallurgica Sinica (English Letters), 2009 , 22(3) : 181 -190 . DOI: 10.1016/S1006-7191(08)60087-3
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