Effects of Carbon Content and Nitrogen Pressure on Synthesis of Ti₂Al(C, N)

Ti₂Al(C,N)was synthesized by hot pressing sintering under different carbon content and nitrogen pressure.The phase was analyzed by X-ray diffraction(XRD).The three-point bending strength was tested and the fracture morphology was analyzed by scanning electron microscopy(SEM).The results showed that the carbon content had no significant effect on the formation of pure Ti₂Al(C,N)phase,and a high nitrogen pressure was beneficial to the synthesis of pure Ti₂Al(C,N)but not conducive to the densification of samples.Density,crystallographic development and impurity phases affect the strength of the specimens.Ti₂Al(C,N)/TiAl composite under 40 kPa of nitrogen pressure was obtained at the ratio of actual carbon content to theoretical carbon content of 0.6.The bending strength of the composite was the highest,reaching 330 MPa.