Tib.sub.2 composite materials and process of producing the same

Details Tib.sub.2 composite materials and process of producing the same Tib.sub.2 composite materials and process of producing the same

C - Chemistry, Metallurgy

22

C

75/1.2

C22C 29/14 (2006.01)

Patent

CA 1253717

ABSTRACT OF THE DISCLOSURE There is disclosed a process for synthetizing TiB2 composite materials containing a metallic phase. The preparation of these composites comprises providing mixtures of titanium alloys which in addition to at least 30 wt% titanium also contain Fe, Ni, Al, Mo, Cr, Co, Cu or mixtures thereof, and boron or ferroboron, reacting these mixtures by local igniting and exothermic reaction or by heating or melting, resulting in the synthesis of composite material containing fine TiB2 crystals dispersed in a fine metallic phase which is derived from the metallic element previously alloyed or combined with the titanium of the titanium alloys or the metallic element or elements contained in the ferroboron. By leaching out the metallic phase, fine TiB2 powders may be obtained. Parts and coatings can also be obtained. The parts are normally obtained by treating the TiB2 material by powder metallurgic techniques. Coatings may be obtained by thermo or plasma sprayed depositing on a substrate. Hard facing techniques may lead to TiB2 composite overlays.

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