Study on the microstructure of SiC_f/TiAl composite materials prepared by foil metallurgy method

SiC_f/TiAl composite was prepared by hot pressing alternative Ti foil/Al foil/SiC fiber in vacuum at650℃×5h+1000℃×3h+1320℃×2h.A fully lamellar microstructure in the matrix and reactions at the interface of fiber and matrix are observed.Ear-like holes exist at the matrix/fiber/matrix interface.The interfacial phases from the fiber to the matrix,are SiC|TiC|Ti₃SiC₂|Ti₅Si₃|Ti₅（Si,Al）₃+Ti₂AlC|γ|α₂/γ colony,accordingly.The phases formation mechanism are explained from views of kinetics,dynamics and crystallography.