Abstract
Hot-dip aluminizing and interdiffusion treatment were used to develop a TiAl3-rich coating on Ti–6Al–4V alloy. Interrupted oxidation at temperatures from 600 to 900°C and isothermal oxidation at 700 and 800°C of the coating were conducted. The coating markedly decreases the oxidation rate in comparison with the alloy at temperatures below 800°C during the interrupted oxidation. The oxidation kinetics follows parabolic relations at 700 and 800°C during the isothermal oxidation. A layered structure of Al2O3/TiAl3/TiAl2/TiAl/alloy from the outside to the inside forms after oxidation at 700°C without changing the main body of the coating.
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