Joining of superalloys to intermetallics using nanolayers

• Type: Article in International Scientific Journal
• Date: 2009

Authors

Ana Sofia Ramos (Author) FEUP; M. Teresa Vieira (Author) FEUP; Sónia Simões (Author) FEUP; Filomena Viana (Author) FEUP; Manuel F. Vieira (Author) FEUP

Journal

Title: Advanced Materials Research

Vol. 59

Pages: 225-229

ISSN: 1022-6680

Publisher: Trans Tech Publications

Indexing

ISI Proceedings

Scopus

INSPEC

COMPENDEX

Scientific classification

FOS: Engineering and technology > Materials engineering

Other information

DOI: 10.4028/www.scientific.net/AMR.59.225

Abstract (EN): Joining nickel based superalloys to gamma-TiAl intermetallic alloys will contribute to a more efficient application of these advanced materials, particularly in extreme environments. In this study, Inconel alloy and gamma-TiAl are joined using as filler alternated nanolayer thin films deposited onto each base material. The nanolayers consisted in Ni/Al exothermic reactive multilayer thin films with periods of 5 and 14 nm deposited by d.c. magnetron sputtering in order to improve the adhesion to the substrates and to avoid the reaction between Ni and Al. Diffusion bonding experiments with multilayer coated alloys were performed under vacuum at 800°C by applying 50 MPa during 1h. Bonding was achieved in large areas of the centre of the joints where regions without cracks or pores were produced, especially when using multilayer thin films with a 14 nm modulation period.

Language: English

Type (Professor's evaluation): Scientific