MCrAlY( M = Ni,Co,NiCo) 合金材料由于其优异的抗氧化性能和抗腐蚀性能,作为热障涂层的粘结层材料或单层涂层得到广泛应用。 简要介绍了 MCrAlY 涂层的组成,并系统地阐述了为提高 MCrAlY粘结层材料性能,对粘结层成分进行改性的研究进展,主要包括掺杂合金元素和掺杂硬质颗粒。 合金元素主要包含 Re,Hf,Pt,Ta 等稀土元素;硬质颗粒主要是 CeO₂,Al₂O₃ 等氧化物颗粒。 通过掺杂合金元素和硬质颗粒,可以使 MCrAlY 涂层中形成扩散障碍,改变 MCrAlY 的相组成,降低粘结层中 Al,Cr 等元素的扩散速率,从而有效地降低 TGO 的生长速率,延缓 TGO 中尖晶石相的形成,提高 MCrAlY 涂层的抗氧化性能。

Due to its outstanding resistance against oxidation and corrosion, MCrAlY ( M = Ni,Co,NiCo) alloy has been widely used as bond coating for thermal barrier coatings or single coating. This paper introduced the MCrAlY coatings and systematically summarized the modification methods for the compositions of MCrAlY coatings, including doping alloy elements or solid particles. Alloy elements were rare elements, such as Re, Hf, Pt, Ta, and the solid particles mainly were CeO₂or Al₂O₃ . Doping with alloy elements and solid particles could facilitate the formation of diffusion barriers in the coatings to decrease the diffusion rate of elements, such as Al, Cr, and change the phase compositions of MCrAlY coatings. This process could effectively reduce the growth rate of TGO, restrain the formation of spinel phases and improve the oxidation resistance of the coatings.