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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
... Abstract This chapter discusses the process, principles, and modeling of the diffusion brazing system. The applications of diffusion brazing to wide-gap joining and layer manufacturing are also discussed. diffusion brazing filler metals layer manufacturing wide-gap modeling...
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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: 31 December 2024
Fig. 11.47 Diffusion brazing connection. (a) Schematic illustration of a copper pipe in an aluminum pipe. (b) Cross section showing the assembly of the two pipes. (c) Brazed connection 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
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
... century, it acquired the meaning “solder with an alloy of copper and zinc,” i.e., essentially its present connotation, including the original precious metal origins. An early application of diffusion brazing, known as Sheffield plate, was developed by Thomas Bolsover in 1743 [ Bradbury 1912...
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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
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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
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.pb.t51230221
EISBN: 978-1-62708-351-5
... in character and conducive to metallic bonding. Therefore, in brazing to nonmetals, diffusion and chemical reaction are inextricably linked to wetting and spreading by the filler. The interaction between a braze and a nonmetal can take one of two forms. It may be classified as either chemical bonding...
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
... of these joining methods. It presents a comparison between solders and brazes. Further details on pressure welding and diffusion bonding are also provided. Key parameters of soldering are discussed, including surface energy and surface tension, wetting and contact angle, fluid flow, filler spreading...
Book Chapter

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...
Book

By David M. Jacobson, Giles Humpston
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
..., brazed and soldered joints often can be endowed with the advantageous mechanical properties of welded and diffusion-bonded joints; at the same time, in most cases they can be disassembled readily, without detriment to the components, like mechanically fastened joints. These features make brazing...
Book Chapter

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...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560309
EISBN: 978-1-62708-291-4
... the steel, and the central portions of some of them remain as islands in the filler metal. Diffusion of copper into the steel has also occurred; this is evidenced by the dark-etching band in the steel adjacent to the joint interface. The third example, given in Fig. 11.2(c) and (d) , is a braze weld...