Any development of new ceramic materials with unique performance based on consolidation of nanosized powders could only succeed on condition of controlling the inevitable active re-precipitation processes during consolidation stage. A fairly effective way to control the grain growth and interphase formation is based on using the shielding effect of additional phases, introduced to obtain the desired parameters of the ceramic composition. Designing the heterophase ceramics one could estimate the phase compatibility either through thermodynamic calculations, or by using structural data of the component phases. The suggested classification of quasi-binary systems encompasses the co-existing refractory phases and defines the prospective 3- to 5-phase eutectics (over 500 systems). Using multi-phase sintered compositions guarantees to realize all the advantages of eutectic systems, such as lower sintering temperature and controlled evolution of the structure.

The VIRIAL Ltd. company gives practical implementation to the above ideas on potential of the multi-phase systems based on ultrafine or nanosized refractory components. A broad range of the high-performance composite systems (Me^dC-Me^dB₂, Me^dN-Me^dB₂, B₄C-Me^dB₂, SiC-Me^dB₂, AlN-Me^dN, Al₂O₃-ZrO₂, SiC-TiC-TiB₂, SiC-B₄C-TiB₂ etc.) were developed for most demanding applications, such as slide bearings and seal rings operating in corrosive and abrasive media, forming and cutting tools, and special high-temperature components. These high-performance products are manufactured commercially using the state-of-the-art machinery. Creative synergy between research and production results in high innovation tempo and development of new materials with maximally precise parameter combinations for specific technical applications.

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