TITLE:
Formula of Thermogradient Effect
AUTHORS:
Zviad Kovziridze
KEYWORDS:
Thermogradient Effect, Matrix Curvature Radius, Parameters, Temperature Field, Thermal Stress, Thermal Expansion
JOURNAL NAME:
Journal of Electronics Cooling and Thermal Control,
Vol.8 No.4,
December
28,
2018
ABSTRACT: Goal: Formulation of empiric formula, which establishes relations between major matrix parameters of ceramic materials and composites and the coefficient of resistance to material thermogradient. Method: Harcpurt’s method of cooling of water in boiling regime till disappearance of water. Results: It is proved that work-pieces reveal maximum thermal resistance and preservation of exploitation properties, when total closed porosity is within 2% - 8%, and pore sizes vary within 1 - 6 mcm. Besides, they are more or less of spherical form and are spread equally in the matrix. Conclusion: Thermogradient effect formula was defined for complex form work-pieces, when surfaces in the pieces are transacted several times by angles of various curvature radii.