Advances in brazing: Science, technology and applications by Dušan P Sekulić

By Dušan P Sekulić

Brazing is a expertise for bonding comparable or diverse substrate fabrics through the use of temperatures above 450 levels Celsius to influence the section switch in an extra filler of clad, ideally with out markedly impacting the integrity of the substrate(s). This publication bargains a set of in-depth shows dedicated to a few state-of-the paintings brazing themes. Nineteen groups, which include a number of or unmarried authors, have permitted the Editor's invitation to arrange chapters in chosen parts. The authors are from a few nations, representing essentially the most revered global associations within the box, together with nationwide laboratories, corporations, educational organisations, and examine facilities from business corporations.Part one introduces the basics of brazing, together with molten steel wetting tactics, power and margins of defense of brazed joints, and modeling of linked actual phenomena. half is going directly to contemplate particular fabrics, corresponding to tremendous alloys, filler metals for prime temperature brazing, diamonds and cubic boron nitride, and sundry ceramics and intermetallics. Chapters additionally discover brazing of carbon-carbon (C/C) composites to metals earlier than the ultimate part discusses functions of brazing and brazed fabrics, together with brazing of slicing fabrics, use of coating suggestions, and metal-nonmetal brazing for electric, packaging and structural functions, fluxless brazing, using glasses and glass ceramics for top temperature functions and nickel-based filler metals for elements in touch with ingesting water.

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Extra info for Advances in brazing: Science, technology and applications

Example text

If one attempts to correlate the highest von Mises stress values with the event of failure in lap shear joints, such values are going to be much greater than those observed in butt-brazed specimens, as shown in Fig. 5. Consequently, von Mises stress is not a very good choice for a failure criterion, due to its great variation with brazed joint geometry. In addition, a major difficulty in estimating von Mises stress in a brazed joint is a reliance on our knowledge of the elastic modulus and the yield strength properties of the braze layer within the brazed joint.

If the external pressure Pext applied to the liquid is negligible compared with the capillary pressure, the liquid will stay inside the gap (see Fig. 13). The liquid can leave the gap only if the external pressure is greater than a threshold value P*c corresponding to the position of the meniscus defined in Fig. 12(c) (in this position the angle formed by the meniscus on the lateral surface of solid A is equal to the equilibrium contact angle on A, θA). 12 (a) θ ɝ 90°: At the microscopic scale, the liquid contacts the rough surface of the solid only on a few points (left).

Kelkar GP and Carim AH (1993), ‘Synthesis, properties, and ternary phase stability of M6X compounds in the Ti-Cu-O system’, J Am Cer Soc, 76, 1815–1820. Koltsov A (2005), Physico-chimie du brasage de AlN: Mouillage et reactivité, PhD Thesis, Polytechnique Institute of Grenoble, France. Koltsov A, Hodaj F and Eustathopoulos N (2008), ‘Brazing of AlN to SiC by a Pr silicide: Physicochemical aspects’, Mat Sci Eng A, 495, 259–264. Kozlova O (2008), Brasage réactif Cu/acier inoxydable et Cu/alumina, PhD Thesis, Polytechnique Institute of Grenoble, France.

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