THERMAL CONDUCTIVITY OF MONO- AND POLYCRYSTALLINE DIAMOND AND COMPOSITES BASED ON IT (REVIEW)

Abstract

The analysis of the accumulated theoretical and experimental data on the study of the thermal conductivity of mono- and polycrystalline diamond and composites based on it was carried out.

As follows from the above review, single- and polycrystalline diamonds of various genesis and composites based on them, due to their unique thermophysical properties, are virtually unrivaled when used as heat sinks in high-power electronic devices. The development of special technologies for the production of diamond single crystals (growth by the T-gradient method under HPHT conditions or using the CVD growth method) made it possible to obtain single crystals with thermal conductivity that is not inferior to natural type IIa diamond single crystals. Modern progressive diamond polycrystalline and composite materials have enormous potential for solving a large number of problems in various high-tech industries, including usage as a heat-conducting tool or structural material, or usage in heat exchange devices operating under extreme thermal loads. The development of new technologies for obtaining diamond composite materials with high thermal conductivity (up to 1000 W×m^-1×K^-1) will allow them to compete with natural diamond in the development of qualitatively new devices of the next generation.