𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Fundamental investigation of the degradation laws of aluminide coatings during high-temperature oxidation

✍ Scribed by P. S. Liu

Publisher
John Wiley and Sons
Year
2003
Tongue
German
Weight
93 KB
Volume
54
Category
Article
ISSN
0947-5117

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

During high‐temperature oxidation, the aluminide coating degrades by two mechanisms, one is the oxidation of the outer surface, and the other is Al diffusion into the substrate. The relevant laws are investigated for coatings on Co‐base superalloys oxidised in air at high temperatures. The driving force mainly comes from the oxidation reaction for the outer degradation layer, and the chemical potential for the inner degradation layer. By an approximation approach, it can be concluded that the life of the outward‐diffusion coating is roughly directly proportional to the second power of the main‐phase thickness of the coating.

📜 SIMILAR VOLUMES

Investigation on the oxidation behaviour
Investigation on the oxidation behaviour of gamma titanium aluminides coated with thermal barrier coatings
✍ R. Braun; M. Fröhlich; A. Ebach-Stahl; C. Leyens 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 German ⚖ 677 KB

## Abstract In the present study, the applicability of thermal barrier coatings (TBCs) on γ‐TiAl alloys was investigated. Two alloys with the chemical compositions of Ti‐45Al‐8Nb‐0.2B‐0.15C and Ti‐45Al‐1Cr‐6Nb‐0.4W‐0.2B‐0.5C‐0.2Si were used. Before TBC deposition, the specimens were pre‐oxidised in