Wärmesperrenschicht für industrielle Gasturbinenschaufel, und industrielle Gasturbine damit

Details

Veröffentlichungs-Nr.

EP2684976

Aktenzeichen

EP13175928

Anmeldetag

10. Juli 2013

Veröffentlichung

13. Oktober 2021

Erteilung

13. Oktober 2021

Rechtsraum

EP

IPC

C23C10/00C23C28/00C23C10/02C23C10/38C23C10/60F01D5/28

Abstract

Disclosed is a turbine blade for an industrial gas turbine including a blade substrate; a multilayer alloy coating containing a diffusion barrier layer; a bond coat; and a top coat, the blade substrate being formed of a single crystal alloy which consists essentially of 0.06 to 0.08% of C, 0.016 to 0.035% of B, 0.2 to 0.3% of Hf, 6.9 to 7.3% of Cr, 0.7 to 1.0% of Mo, 7.0 to 9.0% of W, 1.2 to 1.6% of Re, 8.5 to 9.5% of Ta, 0.6 to 1.0% of Nb, 4.9 to 5.2% of Al, 0.8 to 1.2% of Co, and the balance being Ni and incidental impurities by weight, the multilayer alloy coating, the bond coat and the top coat being directly and sequentially laminated on a surface of the blade substrate, in which the diffusion barrier layer is a multilayer and a discontinuous layer. Thus, the thermal barrier coating structure including a diffusion barrier layer can be provided for the single-crystal turbine blade for the industrial gas turbine formed of a single crystal alloy. The thermal barrier coating structure can suppress growth of a secondary reaction zone caused by element diffusion into the substrate, and can provide durability against thermal fatigue due to thermal cycles and durability against mechanical fatigue.

Anmelder

Firmen

Mitsubishi Power, Ltd.
National University Corporation Hokkaido University
Mitsubishi Hitachi Power Systems, Ltd.
Hitachi, Ltd.
Hitachi Ltd.

Land

🇯🇵 Japan

Fachgebiete