Abstract
Abstract The phase diagram of the Ni–Cr–Al–Y system can provide theoretical guidance for the composition design of NiCrAlY alloy coated on the surface of Ni-based superalloy, and as Ni–Cr–Y is a sub-ternary system of Ni–Al–Cr–Y, its phase relationship is the basis in establishing the thermodynamic database of Ni–Al–Cr–Y system. In the present work, the isothermal section of the Ni–Cr–Y ternary system at 900 °C is experimentally determined using the equilibrated alloys method combined with scanning electron microscopy and energy dispersive X-ray spectroscopy and X-ray diffractometry. Eight three-phase regions are confirmed and one three-phase region can be deduced in the isothermal section, and no new ternary compound is found.
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