Stability conditions of the build-up formation on the surface of the refractory

J. Kaupużs¹ - A. Jakoviċs² - B. Nacke³

¹ Institute of Mathematics and Computer Science, University of Latvia, LV-1459 Riga, Latvia
² Department of Physics, University of Latvia, LV-1002, Latvia
³ Institute for Electrothermal Processes, University of Hannover, D-30167 Hannover, Germany

Abstract
A phenomenological model has been developed to describe the build-up formation and to study the stability conditions of a uniform growth of the build-up layer. Based on suitable approximations, analytical formulae have been derived allowing to evaluate the stability region in the concentration-temperature plane depending on the initial roughness of the growing surface. Tables 2, Figs 5, Refs 8.