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Advances in Brazing

Advances in Brazing
  • Author : Dušan P. Sekulić
  • Publsiher : Woodhead Publishing Limited
  • Release : 19 September 2021
  • ISBN : 9780857094230
  • Pages : 600 pages
  • Rating : 4/5 from 21 ratings
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Summary:
Brazing is a technology for bonding similar or dissimilar substrate materials by using temperatures above 450 degrees Celsius to effect the phase change in an added filler of clad, preferably without markedly impacting the integrity of the substrate(s). This book offers a collection of nineteen in-depth presentations devoted to a number of state-of-the art brazing topics. The authors represent some of the most respected world institutions in the field, including national laboratories, agencies, academic organizations, and research centers from industrial corporations. Part one introduces the fundamentals of brazing, including molten metal wetting processes, strength and margins of safety of brazed joints, and modeling of associated physical phenomena. Part two considers specific materials, such as super alloys, filler metals for high temperature brazing, diamonds and cubic boron nitride, and varied ceramics and intermetallics. Chapters explore brazing of carbon-carbon (C/C) composites to metals, and the final section discusses applications of brazing and brazed materials, including brazing of cutting materials, use of coating techniques, and metal-nonmetal brazing for electrical, packaging and structural applications, fluxless brazing, the use of glasses and glass ceramics for high temperature applications and nickel-based filler metals for components in contact with drinking water.


Advances in Brazing

Advances in Brazing
  • Author : Dušan P. Sekulić
  • Publisher : Woodhead Publishing Limited
  • Release : 19 September 2021
GET THIS BOOKAdvances in Brazing

Brazing is a technology for bonding similar or dissimilar substrate materials by using temperatures above 450 degrees Celsius to effect the phase change in an added filler of clad, preferably without markedly impacting the integrity of the substrate(s). This book offers a collection of nineteen in-depth presentations devoted to a number of state-of-the art brazing topics. The authors represent some of the most respected world institutions in the field, including national laboratories, agencies, academic organizations, and research centers from industrial

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Advances in brazing

Advances in brazing
  • Author : W. Tillmann,A. Elrefaey,L. Wojarski
  • Publisher : Elsevier Inc. Chapters
  • Release : 04 March 2013
GET THIS BOOKAdvances in brazing

An important brazing application is the production of cutting and machining tools. This chapter provides an overview of brazing alloys for the joining of cutting materials. Process-related problems and solutions are presented and discussed. High strength values can be achieved with the right filler alloy and joint design. Most cemented carbides consist of a hard material such as tungsten carbide and a metallic binder. Due to the high carbide content, wetting and bonding reactions have to be monitored. Addition of

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Advances in brazing

Advances in brazing
  • Author : H. Krappitz
  • Publisher : Elsevier Inc. Chapters
  • Release : 04 March 2013
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Although brazing is commonly regarded as a joining technique, the following chapter will introduce possibilities for using brazing as a coating technology, which offers new and unique solutions for applying functional coatings to surfaces. Details are presented of some fundamental aspects of this coating technology with regard to processes, metallurgical considerations and mechanical properties, followed by the various methods for producing coatings by brazing. Examples of applications are explained with regard to the various coating techniques. The chapter gives an

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Advances in brazing

Advances in brazing
  • Author : A. Rabinkin
  • Publisher : Elsevier Inc. Chapters
  • Release : 04 March 2013
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Huge technological progress in high-temperature brazing has made in the last few decades. This chapter reassesses the topic. It describes compositional and structural specifics of base metal (BM) classes at high temperatures. The classification of brazing filler metals (BFMs) is given, with some new compositions. In choosing optimal BFMs the metallurgical background is built on phase diagrams of BM and BFM and potential interactions. Novel methods of BFM placements, joint loading and heat treatment are covered. Rapidly solidified amorphous BFMs

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Advances in brazing

Advances in brazing
  • Author : A. Rabinkin,A.E. Shapiro,M. Boretius
  • Publisher : Elsevier Inc. Chapters
  • Release : 04 March 2013
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A quiet revolution in industry has happened over the last 50 or so years due to the use of diamond and cubic boron nitride (CBN) in many applications. Joining of diamonds to various materials via brazing is very specific compared with conventional brazing due to the unique nature of diamond. This chapter describes the properties of diamond and CBN, and their wetting by and interaction with metals and alloys; factors that affect these interactions; and practical aspects of diamonds and CBN

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Advances in brazing

Advances in brazing
  • Author : V.F. Khorunov,O.M. Sabadash
  • Publisher : Elsevier Inc. Chapters
  • Release : 04 March 2013
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The chapter focuses on the problems of reactive-flux brazing and soldering of aluminium and aluminium to steel. High-temperature fluxes of the K,Al,Si/F salt system improve wetting and capillary properties of filler metals during brazing. The possibility of brazing aluminium using a reactive flux without a filler metal is established. Brazed joints on aluminium have strength equal to that of the base metal, and joints between aluminium and steel preserve their performance after thermal cycling tests. Reactive fluxes

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Advances in brazing

Advances in brazing
  • Author : N. Eustathopoulos,F. Hodaj,O. Kozlova
  • Publisher : Elsevier Inc. Chapters
  • Release : 04 March 2013
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The fundamental equations of wetting and adhesion are presented and the contact angles of non-reactive liquid metals and molten oxides on different types of solids are interpreted. The main features of reactive wetting are briefly described and illustrated. The two types of brazing used in practice (capillary brazing and sandwich brazing) are defined and the thermodynamics and kinetics of capillary infiltration are presented. The different configurations expected to occur in ‘sandwich brazing’ at varying intrinsic contact angles are described and

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Advances in brazing

Advances in brazing
  • Author : D.K. Hawksworth
  • Publisher : Elsevier Inc. Chapters
  • Release : 04 March 2013
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The creation of a thermally induced metallic bond between aluminium components in the absence of powdered brazing fluxes has been achieved using a number of different techniques. Oxide disruption to promote the wetting and flow of filler metal on the surface is necessary for brazed joint formation. This can be achieved by making modifications to the brazing sheet surface, filler metal alloy and the use of composite alloy–flux materials. Different inert atmosphere brazing techniques and associated brazing mechanisms are

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Advances in brazing

Advances in brazing
  • Author : I. Hoyer,B. Wielage
  • Publisher : Elsevier Inc. Chapters
  • Release : 04 March 2013
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The amendment of the Drinking Water Directive has reduced the permissible nickel ion content in drinking water from 50μg/l to 20μg/l. The development of draft standards has begun on a European level so that national standards can be adjusted and transformed to meet European and international standards. For example, DIN EN 15664-1, valid since June 2008, regulates the influence of metallic materials on water intended for human consumption. Since heat exchangers joined with nickel-based filler metals are applied in

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Advances in brazing

Advances in brazing
  • Author : D.P. Sekulić
  • Publisher : Elsevier Inc. Chapters
  • Release : 04 March 2013
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The phenomena involved in a brazing process constitute a set of very complex spatially distributed, transient physical and chemical processes, influenced by multiple parameters. This has been difficult to model reliably. This chapter offers a high level review of three broad areas of modeling: (i) the heating/cooling process during brazing, (ii) the thermomechanical behavior of brazed assemblies, and (iii) micro-scale phenomena, taking place in the joint zone and primarily related to transport phenomena. This discussion illustrates the importance of

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Advances in brazing

Advances in brazing
  • Author : C.A. Walker
  • Publisher : Elsevier Inc. Chapters
  • Release : 04 March 2013
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Metal–nonmetal brazing is an established joining method used to fabricate products such as hermetic electronic packages, insulators for power generation and turbo-machinery components. Brazing presents opportunities for the materials engineer seeking to utilize recently engineered materials in advanced applications and extreme environments. Three commonly used brazing methods used for joining metals to nonmetals will be discussed: conventional brazing methods that use metallization coatings on the nonmetal surface to be brazed; active brazing methods that eliminate the need for metallization

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Advances in brazing

Advances in brazing
  • Author : H. Peng
  • Publisher : Elsevier Inc. Chapters
  • Release : 04 March 2013
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Intermetallics have many metallic characteristics, including luster, and electrical and thermal conductivity. Ordered intermetallic structural materials have recently been the focus of many investigations. The physical and brazing properties of Ni–Al system intermetallics, Fe–Al intermetallics and Ti–Al intermetallics are presented in this chapter, including brazing methods, joint microstructure and corresponding mechanical strengths. The suitability of a variety of brazing filler metals for Ti–Al intermetallics is also discussed, and an extensive comparison is made between the brazing

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Advances in brazing

Advances in brazing
  • Author : V.F. Khorunov,S.V. Maksymova
  • Publisher : Elsevier Inc. Chapters
  • Release : 04 March 2013
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This chapter investigates the problem of brazing heat-resistant materials – high nickel-base and γ-TiAl-base intermetallic alloys. Diffusion brazing with filler metals of the Ni–Cr–B and Ni–Cr–B–Si systems is inefficient for nickel alloys, while composite filler metals based on these systems yield satisfactory results. When used as an alternative to boron- and silicon-containing filler metals, alloys of the Ni–Cr–Zr systems do not form hard and brittle phases at the interface in the joints. Filler metals

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Advances in Brazing

Advances in Brazing
  • Author : Dušan P Sekulić
  • Publisher : Elsevier
  • Release : 04 March 2013
GET THIS BOOKAdvances in Brazing

Brazing processes offer enhanced control, adaptability and cost-efficiency in the joining of materials. Unsurprisingly, this has lead to great interest and investment in the area. Drawing on important research in the field, Advances in brazing provides a clear guide to the principles, materials, methods and key applications of brazing. Part one introduces the fundamentals of brazing, including molten metal wetting processes, strength and margins of safety of brazed joints, and modeling of associated physical phenomena. Part two goes on to

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Advances in brazing

Advances in brazing
  • Author : R. Asthana,M. Singh
  • Publisher : Elsevier Inc. Chapters
  • Release : 04 March 2013
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Advanced ceramic-matrix composites (CMCs) outperform traditional ceramics in many ways and have shown potential for demanding applications. Net-shape manufacture of CMC parts is challenging, and many advanced applications demand robust and reliable integration technologies such as brazing. Brazing of CMC/metal joints is reviewed, highlighting scientific issues together with a discussion of some of the challenges that brazing of CMCs presents. Brazing practices for SiC–SiC, C–SiC, C–C, ZrB2-based ultra-high-temperature composites, and oxide, nitride and silicate-based composites

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