V.V. Prasizkij, R.I.Habibulin, A.S.Matveyev, M.V.Inyuhin

The composite materials based on copper alloys, tungsten and molybdenum obtained in the form of pseudoalloys used in mass production of microelectronic products. This is primarily related to heat dissipation in power electronics. Typically, heat sinks is recommended to use materials with a high level of thermal conductivity, for example, diamond ceramics, various organic composites with diamond filling, aluminum nitride ceramics. Given that the practical application of such materials in mass production in the microelectronics products - the case of the distant future was proposed technological solution for manufacturing composite pseudo VD30. The conventional manufacturing techniques pseudoalloys based on tungsten and copper have a number of deficiencies of both the type of equipment used and the natural desire to reduce production costs, so the imperfection of some technological operations. For the blanks manufacturing the pressing powders of tungsten and copper in the metal mold in a hydraulic press with a variety of specific forces, sintering was carried out in the entrance of the hydrogen furnace used. The studies found that the initial density of blanks virtually no effect on the relative density of sintered material. This changes only the final details of the geometric dimensions. On the other hand, increasing the initial density was necessary to increase the regenerative soaking in hydrogen. When the sintering temperature is 1373 K and 1523 K, even with soaking 7:00 rearrangement of particles of a refractory phase has not occurred. At the turn of whole areas are clearly visible clusters of tungsten are not coated with copper. To obtain a uniform structure of the material had to increase the sintering temperature up to 1650 K at the time of process for 4 hours. Thus a technological process of obtaining a pseudo VD30 was developed that led to the relative density at 98 %, the uniform three-dimensional structure and the possibility of cutting blanks without the use of milling operations.