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diffusion brazing

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.pb.t51230207
EISBN: 978-1-62708-351-5
...Selected material combinations used for diffusion brazing Table 6.1 Selected material combinations used for diffusion brazing Substrate Filler metal Process temperature Remelt temperature Ref °C °F °C °F Alumina Cu/Ni/Cu interlayers 1150 1920 1400 2550 Shalz et al...
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Published: 01 August 2005
Fig. 6.4 Sequential stages in diffusion brazing for a parent metal A and filler metal B that enter into a single eutectic reaction and do not form intermediate intermetallic compounds. In stage 1, at the commencement of heating, some interdiffusion occurs until melting commences at composition More
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Published: 01 August 2005
Fig. 6.10 Fully machined heat exchangers fabricated by copper-tin diffusion brazing More
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Published: 01 August 2005
Fig. 7.27 Alumina assemblies joined by active diffusion brazing. (a) Plot of fracture strength in four-point bend tests of beams cut from assemblies. Adapted from Marks et al. [2000] . Each plate was coated with copper and joined at 1400 °C (2550 °F), in a vacuum better than 13 mPa (2 × 10 –6 More
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Published: 01 August 2005
Fig. 6.2 Plot of shear strength as a function of brazing temperature for diffusion-brazed assemblies, each comprising a foil of copper plated on both sides with a 2 μm (80 μin.) thick layer of tin sandwiched between copper-plated CuCrZr test pieces. The assembly was held for 5 min More
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Published: 01 August 2005
Fig. 6.1 Schematic illustration of the steps involved in making a diffusion-brazed joint More
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Published: 01 August 2005
Fig. 6.9 Patterned, plated, and stacked sheets, aligned in a jig ready for application of the compressive load and diffusion brazing in a vacuum oven. The diffusion brazing conditions were a compressive stress of 3 MPa (440 psi) and a process temperature of 820 °C (1510 °F), sustained for 10 h. More
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Published: 01 August 2005
Fig. 6.6 Nomograph based on Eq 6.1 in the text defining the relationship between brazing time ( t ), tin thickness ( W o ), and the diffusivity ( D α ¯ ) of the solute in the base metal, according to the model of Tuah-Poku, Dollar, and Massalski 1988 [adapted from MacDonald More
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Published: 01 August 2005
Fig. 6.8 Single sheet of copper patterned by photochemical etching to contain a single plan section through six heat exchanger modules. To achieve the total component height, 185 identical sheets were required. The diffusion braze, in this case, 2 μm (8 μin.) of tin, was applied to both sides More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.pb.t5123000x
EISBN: 978-1-62708-351-5
... origins. An early application of diffusion brazing, known as Sheffield plate, was developed by Thomas Bolsover in 1743 [ Bradbury 1912 ]. Sheffield plate is produced by rolling together a plate of copper sandwiched between two thin sheets of silver. The pressed assembly is heated in air using a small...
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Published: 01 November 2011
Fig. 7.9 Diffusion process resulting in loss of identity of original brazed joint. Source: Ref 7.9 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.pb.t51230221
EISBN: 978-1-62708-351-5
...-titanium braze Fig. 7.27 Alumina assemblies joined by active diffusion brazing. (a) Plot of fracture strength in four-point bend tests of beams cut from assemblies. Adapted from Marks et al. [2000] . Each plate was coated with copper and joined at 1400 °C (2550 °F), in a vacuum better than 13...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290165
EISBN: 978-1-62708-306-5
... metal. The composition and surface energy of liquids and solids are assumed to remain constant. In real systems, however, these interactions occur: Alloy formation between liquid and base metal Diffusion of base metal into brazing filler metal Diffusion of filler metal into grains...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2004
DOI: 10.31399/asm.tb.ps.t62440001
EISBN: 978-1-62708-352-2
... and Thermodynamic Properties of Interfaces in Metallic Systems , Proc. Conf. British Association for Brazing and Soldering , Third International Conference , London , paper 5 • Feature , 1976 . Diffusion Bonding—Tomorrow’s Low-Cost Fabrication Tool , Met. Mater. , Feb , p 37 – 39...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290137
EISBN: 978-1-62708-306-5
... Abstract Solid-state welding processes are those that produce coalescence of the faying surfaces at temperatures below the melting point of the base metals being joined without the addition of brazing or solder filler metal. This chapter discusses solid-state welding processes such as diffusion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.pb.9781627083515
EISBN: 978-1-62708-351-5
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.pb.t51230001
EISBN: 978-1-62708-351-5
.... ), Paper 5 • Feature , 1976 . Diffusion Bonding—Tomorrow’s Low-Cost Fabrication Tool , Met. Mater. , Feb , p 37 – 39 • Feduska W. , 1959 . High-Temperature Brazing Alloy—Base Metal Wetting Reactions , Weld. J. Res. Suppl. , Vol 38 ( No. 3 ), p 122s – 130s • Fleetwood...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280149
EISBN: 978-1-62708-267-9
...). Intermediate layers are essential to most diffusion bonding operations. The interlayer may be different from any of the basis metals/alloys. Brazing relies on the melting and subsequent solidification of an interlayer (braze metal) without any melting of the basis metals. Joining Superalloys...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230401
EISBN: 978-1-62708-298-3
..., and testing. beryllium alloys beryllium bonding brazing soldering welding BERYLLIUM has been successfully joined by fusion welding, brazing, solid-state bonding (diffusion bonding and deformation bonding), and soldering. These different processes are described, and the advantages...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.pb.t51230143
EISBN: 978-1-62708-351-5
... Temperature Brazing and Diffusion Welding , Aachen , Nov 24 – 26 , (DVS-Berichte Band 148, Dusseldorf), p 35 – 37 • Schwartz M.M. , 2003 . Brazing , 2nd ed. , ASM International • Sloboda M.H. , 1961 . Design and Strength of Brazed Joints , Weld. Met. Fabr. , Vol 29...