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INTEGRAL EXPANSION OF VITREOUS ENAMELS BETWEEN THE SOFTENING POINT AND ROOM TEMPERATURE *
Author(s) -
Rosbnbero J. H.,
Langerman A.
Publication year - 1937
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1937.tb19896.x
Subject(s) - enamel paint , materials science , softening point , composite material , softening , thermal expansion
A bstract The differential expansion of vitreous enamels and base metal is estimated from the mechanical properties of a closed ring of the sheet metal covered on the outside with enamel. An equation is derived relating the tangential static force necessary to overcome the stress in the ring to the coefficient of expansion and elastic properties of the enamel. The equation is reduced to linear form and a plot gives accurately ( as – ae ) Δ T , where as and ae are, respectively, the average coefficients of the steel and the enamel in the temperature interval, Δ T , between the softening point of the enamel and room temperature. The results by this method are in good agreement with those obtained by interferometer measurements.