The 1100 °C isothermal section of the Ti-Co-Si ternary system

The 1100 °C isothermal section of the Ti-Co-Si ternary system has been determined, for which 24 single-phase fields, 42 two-phase fields, and 22 three-phase fields were detected. Ten ternary phases were detected; these include eight previously reported in the literature plus two previously unreported, H(Ti4CoSi4) and J(Ti3Co2Si). The I phase, whose crystallographic data have not been reported before, is found to be orthorhombic with a = 0.7961 nm, b = 0.7048 nm, and c = 0.5467 nm. Except for K and H, all ternary phases show considerable composition ranges, especially the G' and V phases.