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Formation and properties of TiB2-Ni composite ceramics

Vlasova Marina (Center of Investigation in Engineering and Applied Sciences of the Autonomous University of the State of Morelos (CIICAp-UAEMor), Cuernavaca, Mexico)
Bykov Alexander (National Academy of Sciences of Ukraine, Institute for Problems of Materials Science, Kiev, Ukraine)
Kakazey Mykola (Center of Investigation in Engineering and Applied Sciences of the Autonomous University of the State of Morelos (CIICAp-UAEMor), Cuernavaca, Mexico)
Aguilar Pedro Antonio Marquez (Center of Investigation in Engineering and Applied Sciences of the Autonomous University of the State of Morelos (CIICAp-UAEMor), Cuernavaca, Mexico)
Melnikov Igor (National Research University of Electronic Technology, Department of Electronic Materials, Zelenograd, Moscow, Russian Federation.)
Rosales Isai (Center of Investigation in Engineering and Applied Sciences of the Autonomous University of the State of Morelos (CIICAp-UAEMor), Cuernavaca, Mexico)
Tapia Rene Guardian (Center of Investigation in Engineering and Applied Sciences of the Autonomous University of the State of Morelos (CIICAp-UAEMor), Cuernavaca, Mexico)

An analysis of physical and chemical processes occurring during hot pressing of the 95 wt. % TiB2-5 wt. % NiCl2By powder mixture in the temperature range 1800-2000°C has been performed by X-ray diffraction, scanning electron microscopy, an electron-probe microanalysis. It has been established that, in the process of heat treatment, sintering, TiB2 grain growth, diffusion of boron and titanium into nickel layers, and the formation of NixByTiz layers between TiB2 grains occur. These layers act as a grains binder TiB2. It is shown that the drilling of the obtained high-strength ceramics can be performed by laser machining.

Keywords: TiB2-Ni, sintering, TiB2-NixByTiz ceramics