The phase equilibria of the La-Ti-Si ternary system at 773 K

The phase equilibria of the La–Ti–Si ternary system at 773 K have been investigated mainly by means of X-ray powder diffraction (XRD) with the aid of scanning electron microscopy (SEM), optical microscopy (OM) and differential thermal analysis (DTA). The isothermal section consists of 14 single phase regions, 25 binary phase regions and 12 ternary phase regions. The binary compounds Ti5Si4 and La2Si3 are confirmed at 773 K. Therefore, there are 11 binary compounds in the system, which are La5Si3, La3Si2, La5Si4, LaSi, La2Si3, LaSi2, Ti3Si, Ti5Si3, Ti5Si4, TiSi and TiSi2. No ternary compound is found in the work. None of the phases in this system reveals a remarkable homogeneity range at 773 K.