Journal Article

Technical and Economical Aspects of Current Thermal Barrier Coating Systems for Gas Turbine Engines by Thermal Spray and EBPVD: A Review

Feuerstein, Albert, Knapp, James, Taylor, Thomas, Hitchman, Neil, Ashary, Adil, Bolcavage, Ann

2008

Overview

The most advanced thermal barrier coating (TBC) systems for aircraft engine and power generation hot section components consist of electron beam physical vapor deposition (EBPVD) applied yttria-stabilized zirconia and platinum modified diffusion aluminide bond coating. Thermally sprayed ceramic and MCrAlY bond coatings, however, are still used extensively for combustors and power generation blades and vanes. This article highlights the key features of plasma spray and HVOF, diffusion aluminizing, and EBPVD coating processes. The coating characteristics of thermally sprayed MCrAlY bond coat as well as low density and dense vertically cracked (DVC) Zircoat TBC are described. Essential features of a typical EBPVD TBC coating system, consisting of a diffusion aluminide and a columnar TBC, are also presented. The major coating cost elements such as material, equipment and processing are explained for the different technologies, with a performance and cost comparison given for selected examples.

• Publisher: Springer US,Springer,Springer Nature B.V
• Subject: Aerospace engines / Analytical Chemistry / Applied sciences / Bonding / Characterization and Evaluation of Materials / Chemistry and Materials Science / Coating / Coating processes / Corrosion and Coatings / Diffusion / Diffusion coating / Electron-beam physical vapor deposition / Exact sciences and technology / Gas turbines / Machines / Manufacturing / Materials Science / Metals. Metallurgy / Nonmetallic coatings / Peer Reviewed / Processes / Production techniques / Sprayers / Sprays / Surface treatment / Surfaces and Interfaces / Thin Films / Tribology / Turbines / Yttria stabilized zirconia