%0 Journal Article
%T Formula of Thermogradient Effect
%A Zviad Kovziridze
%J Journal of Electronics Cooling and Thermal Control
%P 49-54
%@ 2162-6170
%D 2018
%I Scientific Research Publishing
%R 10.4236/jectc.2018.84004
%X <strong>Goal</strong>: Formulation of empiric formula, which establishes relations between major matrix parameters of ceramic materials and composites and the coefficient of resistance to material thermogradient. <strong>Method</strong>: HarcpurtˇŻs method of cooling of water in boiling regime till disappearance of water. <strong>Results</strong>: 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. <strong>Conclusion</strong>: 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.
%K Thermogradient Effect
%K Matrix Curvature Radius
%K Parameters
%K Temperature Field
%K Thermal Stress
%K Thermal Expansion
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=89568