Published 13-08-2024
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Abstract
An admixture consisting of local silica sand, feldspar and some chemical additives was used to produce varied s of glass by conventional smelting procedures.
These blends of glass with some additives were made into an aqueous slip (slurry) for wet application process. The aqueous slips prepared were applied on OL 140 type of Romanian steel by dipping. The samples were dried and subsequently enameled in an oven maintained at a range of temperatures of 700 - 900 oC. Double faced enameled surfaces were thus developed.
A microscopic characterization of the formed enamel / steel composite interface was explored with scanning electron microscope and emission dispersive atomic x – ray. The SEM revealed a continuous graded interface which made perfect contact with the glass coating and the steel support. Also dendritic networks were evident. EDAX unmasked the slope of the dissolution and diffusion of the iron into the ceramic phase. The ceramic profile is a mirror image of the iron profile. The emission dispersive atomic x – ray, (EDAX) further monitored the elemental distribution and their quantities at the point of bond formation (ceramic – metal interface). Fe and Si were found to be the major components of the interface