Search

A study was conducted on the strongly positive temperature dependence of diamond-based heat sink paste thermal conductivity. The n-decane/diamond interface phononscattering was found to cause a finite interfacial thermal conductance that was highly positive temperature dependent. Results also show that the enhancement of diamond particle size will increase thermal conductivity and reduce dependence on positive temperature.

Presents an analytical approach to the thermal conductivity mismatch effect based on an approximate analytical expression for the effective coefficient of thermal expansion in thermal bending under conditions of steady-state heat flow. Role of thermal conductivity mismatch effect in the magnitude of the thermal stresses; Solution suggested for materials selection for engineering design involving high magnitudes of thermal stresses.

Examines the transverse thermal conductivity of thin carbon/silicon carbide (SiC) composites fabricated by slurry infiltration and pyrolysis. Effects of heat treatment parameters on the crystallization of the polymer-derived SiC; Development of high-yield polymer precursors for stoichiometric SiC.

A review is presented of recent experimental data on the effect of microstructural and compositional het erogeneity on the thermal diffusivity/conductivity of structural materials for high-temperature applications. These materials include nitrides, carbides, oxides, and various composites. The microstructural and compositional variables include microcracking, solid solution alloying, densification aids, im purities, and the amount, type, distribution, and orientation of dispersed phases. Such variables can be used to tailor the heat transfer properties of a material for specific require ments. [ABSTRACT FROM PUBLISHER]

Expressions are derived for the effect of penny-shaped cracks of various orientations on the thermal conductivity of solid materials. [ABSTRACT FROM PUBLISHER]

A modification of the original theories of Rayleigh and Maxwell permitted the deriva tion of expressions for the effective thermal conductivity of composites consisting of a continuous matrix phase with dilute concentrations of dispersions with spherical, cylin drical and flat plate geometry with a thermal barrier resistance at the interface between the components. [ABSTRACT FROM PUBLISHER]

Comments on the complex subject of thermal conductivity of the composites. Thermal conduction behavior of carbo-fiber-reinforced aluminoborosilicate-glass matrix composites; Types of composite system.