Preparation and Mechanical properties of in-situ TiCx/Ni composite materials

Abstract:

TiC_x/Ni composite materials was prepared using Ti₃AlC₂ and Ni alloy powders as raw materials by in-situ hot-pressing sintering. Ni alloy, under the high temperature, triggers Ti₃AlC₂ dissociation, Al atoms and a small number of Ti atoms seperate from the matrix of Ti₃AlC₂ and react with Ni alloy. TiC_x in the value of x equal to 0.625 and 0.715 was formed as adding 20Vol%Ti₃AlC₂ and 40Vol% Ti₃AlC₂, respectively.XRD, SEM and EDS were used to analysize the phase composition and microstructure of composite.The interface between in situ generated TiC_x and Ni alloy combined strongly, therefore the composite materials perform excellent mechanical properties. After adding 20Vol% and 40Vol%Ti₃AlC₂, the compression strength of composite material reached to 2.09 GPa and 2.2 GPa, and corresponding compression fracture strain was 9.6% and 8.5%, respectively.#$NLKeywords: In-situ TiC_x; hot-pressing sintering; mechanical properties; microstructure

Key words:In-situ TiCx; hot-pressing sintering; mechanical properties; microstructure