The invention is suitable for the manufacture of flat or shaped
titanium matrix composite articles having improved mechanical properties such as lightweight plates and sheets for aircraft and automotive applications, heat-sinking lightweight electronic substrates, bulletproof structures for vests, partition walls and
doors, as well as for sporting goods such as helmets, golf clubs, sole plates, crown plates, etc. A fully-dense discontinuously-reinforced
titanium matrix composite (TMMC) material comprises (a) a matrix of
titanium or
titanium alloy as a major component, (b)
ceramic and / or
intermetallic hard particles dispersed in the matrix in the amount of ≦50 vol. %, and (c) complex
carbide- and / or
silicide particles at least partially soluble in the matrix at the
sintering or
forging temperatures such as Ti4Cr3C6, Ti3SiC2, Cr3C2, Ti3AlC2, Ti2AlC, Al4C3, Al4SiC4, Al4Si2C5, Al8SiC7, V2C, (Ti,V)C, VCr2C2, and V2Cr4C3 dispersed in the matrix in the amount of ≦20 vol. %. The method for manufacturing TMCC is comprised of the following steps: (a) preparing a basic powdered blend containing matrix
alloy or titanium powders, dispersing
ceramic and / or
intermetallic powders, and powders of said complex
carbide- and / or
silicide particles, (b) preparing the Al—V master
alloy containing ≦5 wt. % of iron, (c) preparing the Al—V—Fe master
alloy fine powder having a particle size of ≦20 μm, (d) mixing the basic powdered blend with the master alloy
powder to obtain a
chemical composition of TMCC, (e) compacting the
powder mixture at
room temperature, (f)
sintering at the temperature which provides at least partial
dissolution of dispersed powders, (g)
forging at 1500-2300° F., and (h) cooling. The resulting TMCC has density over 98% and closed discontinuous
porosity after
sintering that allows making hot deformation in air without encapsulating. The invention can be used to produce near-
full density near-
net shape parts from titanium matrix composite materials with acceptable mechanical properties without a hot deformation.