Manufacturing Technology 2023, 23(4):436-448 | DOI: 10.21062/mft.2023.052

High Temperature Protective Coatings for Aeroengine Applications

Jakub Jopek ORCID..., Magdalena Mokrzycka ORCID..., Marek Góral ORCID..., Barbara Koscielniak ORCID..., Kamil Ochal ORCID..., Marcin Drajewicz ORCID...
Research and Development Laboratory for Aerospace Materials, Rzeszow University of Technology, Powstancow Warszawy 12, 35-959 Rzeszow, Poland

Nickel superalloys are the main materials used in manufacturing of turbine blades and vanes in aero-space industry. They works is extremely high temperature in a corrosive environment (oxidation, hot corrosion) and undergo several different thermo-mechanical loads. Aluminide coatings are the main method of protection of the surface of nickel superalloys against exhaust gasses environment in jet en-gine. In presented article the microstructural characterization of aluminide coatings produced using two industrial methods (pack cementation and out of pack was conducted. The commercially available powders manufactured by Oerlikon-Metco were used in aluminizing process using industrial Bernex BPX Pro 325S CVD system. The MAR M247 was used as a base material. Amount of activator and pure aluminum had a noticeable effect on the total thickness of obtained layers. Both samples with increased activator and pure aluminum content formed 5 to 11.5 x thicker aluminide coatings in comparison to other sample, which was aluminized using an Al-Co powder as aluminum source. Further investiga-tions are needed to specify precise phase composition of analyzed coatings.

Keywords: Aluminide coatings, Turbine blades, MAR M247, CVD

Received: March 7, 2023; Revised: July 11, 2023; Accepted: July 13, 2023; Prepublished online: July 13, 2023; Published: September 5, 2023  Show citation

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Jopek J, Mokrzycka M, Góral M, Koscielniak B, Ochal K, Drajewicz M. High Temperature Protective Coatings for Aeroengine Applications. Manufacturing Technology. 2023;23(4):436-448. doi: 10.21062/mft.2023.052.
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