Diffusion brazing of nickel aluminides

Journal Article · Fri Sep 01 04:00:00 EDT 1995 · Welding Journal

OSTI ID:109995

Orel, S V; Parous, L C; Gale, W F ^[1]

---

1. Auburn Univ., AL (United States)

NiAl is a promising candidate material for high-temperature applications. However, NiAl suffers from poor low-temperature ductility and toughness. Hence, suitable technologies are required for NiAl to Ni-based alloy joining. In view of the poor low-temperature ductility and strong alumina-forming tendency of NiAl, diffusion brazing seems to be the most suitable technology for joining NiAl to itself and to Ni-based alloys. This paper examines the diffusion brazing of NiAl to Ni using Ni-Si-B interlayers and draws comparisons with previous work by authors on NiAl/Ni-Si-B/NiAl and Ni/Ni-Si-B/Ni diffusion brazing. The progression of micro-structural development in the NiAl/Ni-Si-B/Ni joints is compared with that expected from standard models of the diffusion brazing process in which dissolution of the substrate material, isothermal solidification and solid-state homogenization occur sequentially.

• OSTI ID: 109995
• Journal Information: Welding Journal, Journal Name: Welding Journal Journal Issue: 9 Vol. 74; ISSN 0043-2296; ISSN WEJUA3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
BORIDES
BORON ALLOYS
BRAZED JOINTS
BRAZING
BRAZING ALLOYS
HEAT RESISTING ALLOYS
MICROSTRUCTURE
NICKEL
NICKEL ALLOYS
SILICON ALLOYS