DZ40M钴基合金铝化物涂层的循环氧化

Cyclic Oxidation Behavior of the Aluminide Coatings on the Co-Base Superalloy DZ40M

摘要:

以新型定向凝固钴基高温合金ＤＺ４０Ｍ为基体，研究其低压化学气相沉积铝化物涂层的循环氧化行为，发现该涂层具有较高的抗循环氧化性能，涂层与基体结合良好。涂层退化主要是由外表面氧化膜的愈合消耗Ａｌ源所造成，沉积渗剂中加入Ｔｉ可加速涂层的退化。

Abstract:

The cyclic oxidation behavior of aluminide coatings made by low pressure chemical vapor deposition on to a new Co base superalloy DZ40M has been investigated. It was found that these coatings bonded well to the matrix well. Coating degradation when it occurs is due primarily to a depleting Al source as the oxide scale on outer surface is heated during cyclic oxidation. This degradation will be accelerated if Ti is added to the aluminizing reagent during deposition.