Diffusion Bonding of Advanced Aerospace Metallics

Abstract

Advanced aluminium and titanium alloys, metal matrix composites (MMC's) and intermetallic compounds are of considerable interest to the aerospace industry. These materials offer significant mechanical improvements over many conventional materials. Appropriate joining technologies are being developed to utilise the advantages these materials offer in aerospace applications. Diffusion bonding offers considerable potential as a joining process. This keynote paper will review diffusion bonding with reference to these advanced metallic systems.

Production, Characterization, and Mechanical Evaluation of Dissimilar Metal/Ceramic Joints

“…The technique has been applied, so far, mainly for the joining of Al 2 O 3 and SiO 2 , but its utility has also been demonstrated for joining of Si 3 N 4 and other new engineering ceramics like WC. The technological advantages of diffusion bonding are low deformation which enables parts to be joined with little distortion, the ability to join large areas, the applicability of diffusion bonded joints at high service temperatures, and the www.intechopen.com possibilities for joining materials in a none conventional way (Dunford & Wisbey, 1993). However, the major disadvantages of diffusion bonding are high capital costs, and the restricted joint geometries that can be produced (Peteves et al, 1996).…”

Diffusion bonding of silicon nitride to titanium

“…the ability to joïn large areas, the applicability of diffusion bonded joints at high service temperatures. and the possibilities for joining materials in a none conventional way (37) .…”

Investigations on the diffusion bonding of titanium alloy and aluminum alloy using copper at low bonding pressure

“…16 Many authors have recommended diffusion bonding (DB) as a suitable technique to fabricate dissimilar materials primarily because it offers significant advantages and addresses several limitations encountered with the joining mentioned above processes. [17][18][19] However, oxidation and inadequate solubility of Al at the bonding area are a few technical difficulties that are allied with DB at high temperatures. 20 The previous literature on dissimilar DB of specimens for a longer time reported the development of discontinuities in diffusion interfaces and high costs linked to energy consumption.…”