Abstract
Some unsatisfactory characteristics of Ti2AlNb-based alloys restrict its practical application, such as the insufficient high temperature oxidation, corrosion resistance and poor wear resistance. The double glow plasma surface chromizing can improve their wear resistance, however the hot corrosion properties of surface plasma chromised Ti2AlNb-based alloys were little investigated. The microstructure, composition and surface hot corrosion morphologies of Ti2AlNb-based alloy were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The XRD of alloying layer indicated that the Cr-Nb alloy phase was the main composition, including the compact and uniform Cr2Nb phase, which was benefit to improve the hot corrosion properties of alloy.
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