Component, in particular turbine blade which can be exposed to high temperatures, and method of producing said component

US5395699A · kind A · utility

Assignee

• Asea Brown Boveri, S.A. · CH

Inventors

• Peter Ernst · Hattersheim, DE
• Manfred Thumann · Ennetbaden, CH
• Christoph Tonnes · Wettingen, CH

Key dates

• Filing date: Jun 4, 1993
• Grant date: Mar 7, 1995
• Expiry date: Jun 4, 2013

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12174
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A turbine blade including a blade foot and a blade. The blade foot is formed by a ductile material and the blade comprises a material which is brittle compared to the ductile material but resistant to high temperature. The two materials are alloys of different chemical compositions and are hot-compacted with the formation of a boundary layer joining the blade foot and blade to produce a bimetallic composite material. The blade foot predominantly comprises a titanium-base alloy and the blade comprises a gamma-titanium aluminide containing 0.5 to 8 atomic percent of a dopant. The turbine blade exhibits outstanding mechanical properties at high temperatures, good ductility at room temperature and a long service life.