材料科学
尖晶石
物理气相沉积
图层(电子)
涂层
冶金
溅射沉积
沉积(地质)
溅射
高温合金
燃气轮机
扩散
复合材料
薄膜
合金
纳米技术
古生物学
工程类
物理
热力学
生物
机械工程
沉积物
作者
Bin Peng,Yu X. Xu,Zhiping Fan,Qimin Wang
标识
DOI:10.1016/j.surfcoat.2023.130307
摘要
NiCrAlY has been widely used as a protective layer on gas turbine engine hot section components and can be synthesized by different physical vapor deposition techniques. Here, the oxidation behaviors of arc-evaporated, magnetron-sputtered, and hybrid arc/sputtering NiCrAlY coatings were investigated. Preparation techniques can significantly affect the oxidation behavior of NiCrAlY coatings by adjusting the Al content. Arc-evaporated NiCrAlY coating has the lowest resistance against oxidation at 1100 °C, forming a bi-layered scale with outer spinel-rich and inner alumina-rich oxides. In comparison, the other two NiCrAlY coatings with higher Al content were oxidized to form dense scales enriched in α-Al2O3 after 250 h of oxidation. Furthermore, the outward diffusion of Mn from Hastelloy X promotes the production of spinel oxides, which accelerates the oxidation process.
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