Investigation of the bond coats for thermal barrier coatings on Mg alloy

▸ Bond coats of Al@Ni, MCrAlY(M = Co, Ni) and Ni@Al for Mg alloy were investigated. ▸ The bond coats had moderate TECs (13-15 × 10−6 K−1). ▸ The structure of original powders affected the properties of the sprayed bond coats. ▸ MCrAlY bond coat had excellent oxidation resistance at 400-500 °C. ▸ MCrAlY bond coat had excellent corrosion resistance in 3.5% NaCl solution. ▸ MCrAlY was demonstrated as the most appropriate bond coat for TBCs on Mg alloy.