Fabrication of (Ti-Al-Si)/(Ti-C)/Ti – layered alloy by SHS pressing

A metal-carbide-intermetallic material based on combustion products of the layer system (Ti-Al-Si)/(Ti-C)/Ti was for first time obtained with help self-propagating high-temperature synthesis (SHS) combined pressing. Exothermic from elementary powders carried out at a pressure 10 MPa, and pressing hot product 100 MPa. It has been shown that SHS contributes to formation permanent joints «metal/carbide/intermetallic» layers. The main features microstructure formation, phase composition, strength properties transition zones boundary between reacting compositions, Ti-C Ti-Al-Si Ti-metal substrate are investigated. is during reaction, homogeneous layers an insignificant content cracks pores formed. thickness zone least 15 µm. formed in is, according results X -ray analysis, triple Ti 20 Al 3 Si 9 , which, calculated by Rietveld method, 87 wt. %. In addition, contains secondary amount 13 energy dispersion analysis revealed diffusion aluminium through titanium carbide into depth approx. 30 µm observed. Microhardness value about GPa. rectilinear nature crack propagation synthesized layer, as well Palmquist resistance coefficient varying within 5.1-5.7 MPa·m 1/2 indicate fragility material.