Abstract: The invention discloses a method for in-situ exsolution modification of a surface of a metal material, which comprises steps of : (1) a substrate metal powder are fully mixed with a metal powder for modification to obtain a raw material powder; (2) the raw material powder obtained in step (1) are prepared into a metal material by a preparation method at a non-equilibrium condition; (3) a heat treatment on the metal material prepared in step (2) is performed so that the metal material reaches an equilibrium state; after cooling to room temperature, a doped phase is exsolved to the surface of the metal material to obtain a modified metal material.

Abstract: The present disclosure discloses a method for coating an environmental barrier coating, comprising: coating an aluminum film layer on a surface of a rare earth silicate ceramic layer, and heat treating the aluminum film layer to form a rare earth aluminate phase at least in pores of a side of the rare earth silicate ceramic layer facing the aluminum film layer. An environmental barrier coating prepared by the above method is also disclosed.