一、前言 AZ-2涂层是采用真空蒸镀-扩散渗铝新工艺得到的铝化物涂层,作为发动机一级涡轮叶片的保护涂层已经投入生产应用,这在国内是首创,在国外尚未见报道。本文介绍AZ-2涂层渗态时的组织结构及其区别于一般铝化物涂层的某些特点以及涂层组织结构在氧化过程中的变化。 First, the preface AZ-2 coating is the use of vacuum evaporation - diffusion aluminizing new process obtained aluminide coating, as a protective layer of the turbine engine blades have been put into production and application, which is the first in China, not yet in foreign countries See report. This article describes the microstructure of the AZ-2 coating during its osmotic conditions and some of the characteristics that distinguish it from the typical aluminide coating and the changes in the microstructure of the coating during the oxidation process.