Äusserste Abrasive Turbinenschaufelschicht mit Abgestuften Keramiken

Details

Veröffentlichungs-Nr.

EP4729743

Anmeldetag

26. September 2025

Veröffentlichung

22. April 2026

Rechtsraum

EP

IPC

F01D5/28, F01D11/12, C23C28/00

Abstract

A turbine blade (114) and related method for forming an outermost abrasive layer (170) are disclosed. The blade includes an airfoil body (124) having a radial outermost surface (160) relative to a turbine rotor, a bond coat (172) over the radial outermost surface, and the outermost abrasive layer over the bond coat. The outermost abrasive layer (170) includes a graded oxide ceramic layer (174) or a graded metal ceramic layer (176). The outermost abrasive layer is vacuum heat treated to harden the layer, resulting in increased rub and improved clearance between the blade tip, creating a smaller tip gap and lower leakage. The heat-treated abrasive layer is also resistant to oxidation at higher temperatures, e.g. greater than 1090°C (~2000°F), caused by the increased use of higher temperature fuels, such as hydrogen. The vacuum heat treatment also results in thermal cycle testing improvements.

Anmelder

Firma

GE Vernova Technology GmbH

Land

🇨🇭 Schweiz