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reaction bonding

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Published: 01 October 2012
Fig. 11.24 Flow diagram of the reaction bonding process for processing SCS-6 fiber/Si 3 N 4 composites. Source: Ref 11.11 More
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Published: 01 October 2012
Fig. 10.11 Statistical aspects of material design. (a) Weibull plot for reaction-bonded silicon nitride. (b) Improved Weibull distributions. (c) Modification of normal distribution by proof testing. Source: Ref 10.9 More
Image
Published: 01 October 2012
Fig. 11.25 Microstructure of reaction-bonded SCS-6 fiber/Si 3 N 4 composite showing uniform fiber distribution and small amounts of residual porosity around the periphery of the large-diameter fibers. Source: Ref 11.11 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550569
EISBN: 978-1-62708-307-2
..., continuous fiber ceramic composites, and carbon-carbon composites. It also describes a number of ceramic-matrix composite processing methods, including cold pressing and sintering, hot pressing, reaction bonding, directed metal oxidation, and liquid, vapor, and polymer infiltration. ceramic-matrix...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550511
EISBN: 978-1-62708-307-2
... 33 18 3.1 1.1 3.3 800 (116) 725 (105) 13 1400 2550     Reaction-bonded (RBSN) 200 29.0 0.22 10 10 3.1 0.87 2.7 295 (43) 295 (43) 10 1400 2550 Silicon carbide     Hot-pressed (HPSN) 430 62.4 0.17 80 51 4.6 0.67 3.3 550 (80) 520 (75) 10 1500 2730...
Image
Published: 01 October 2012
Fig. 10.23 Variation of flexural strength with temperature for various types of silicon nitride ceramics. SSN, sintered silicon nitride; HPSN, hot-pressed silicon nitride; HIPSN, hot isostatically pressed silicon nitride; RBSN, reaction-bonded silicon nitride. Source: Ref 10.7 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290279
EISBN: 978-1-62708-306-5
..., that is, an irreversible crosslinking reaction. Neither molded thermoset or vulcanized elastomer components can be reshaped by means of heating, because degradation occurs. It follows that thermoset and vulcanized rubber components can be joined only with adhesive bonding or mechanical fastening methods. Thermoplastic...
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 August 2013
DOI: 10.31399/asm.tb.ems.t53730081
EISBN: 978-1-62708-283-9
.... There also are materials formed by reactions involving water. Most ceramics are brittle: they fracture before they deform very much. Crystalline Ceramics Crystalline ceramics are compounds consisting of metal and nonmetal ions bonded either covalently or ionically. Most have high melting points...
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
..., to “stick” the components together. The process involves a chemical reaction, which may simply occur through exposure of the adhesive to air, leading to the formation of a hydrogen-type bond between the cured adhesive and the respective components. The original interfaces of the joint are preserved...
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
... material, often containing various additives, to “stick” the components together. The process involves a chemical reaction, which may simply comprise exposure of the adhesive to air, leading to the formation of a hydrogen-type bond between the cured adhesive and the respective components. The original...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610327
EISBN: 978-1-62708-303-4
... at 1000 °C (1830 °F). (g) Hot pressed at 27 °C (80 °F). (h) Hot pressed at 1000 °C (1830 °F). (j) At 300 K (27 °C, or 80 °F). (k) At 1473 K (1200 °C, or 2190 °F). (m) Sintered. (n) Hot pressed. (p) Reaction bonded. Source: Ref 6 If the resistance of the material...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ems.t53730099
EISBN: 978-1-62708-283-9
... → | -CH 2 -CH 2 - | n where n is a very large number. This reaction is called an addition reaction. It must be initiated by breaking the double carbon-carbon bond in the ethylene monomer. This may be broken by stimulation of an initiator such as a radical, R − , which produces...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780329
EISBN: 978-1-62708-281-5
... that does not occur outdoors. The activation energy of most photochemical reactions in the gas phase usually lies no more than 5 to 6% above the dissociation energy of the bond being broken. Typical bond dissociation energies in plastics range between 420 and 290 kJ/mol (100 and 70 kcal/mol). Therefore...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.pb.9781627083515
EISBN: 978-1-62708-351-5
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2004
DOI: 10.31399/asm.tb.ps.9781627083522
EISBN: 978-1-62708-352-2
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
... fillets at the edges of the joint. Diffusion bonding sidesteps the need for wetting and spreading by a filler metal (see Chapter 1, section 1.1.7.3 ). Once formed, diffusion-bonded joints are stable to high temperatures so that the service temperature of the assembly can actually exceed the peak...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870063
EISBN: 978-1-62708-314-0
..., and they exhibit more shrinkage during cure. Polyesters cure by addition reactions in which unsaturated carbon-carbon double bonds (C=C) are the locations where crosslinking occurs. A typical polyester consists of at least three ingredients: a polyester; a crosslinking agent such as styrene; and an initiator...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230441
EISBN: 978-1-62708-298-3
..., acrylamide, and acrylonitrile. They are all two-part systems. They are not mixed for application; rather, the resin is applied to one adherent, and the accelerant applied to the other adherent. When mated, the bonding reaction occurs quickly (in minutes), even at room temperature. Pretreated parts can...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240607
EISBN: 978-1-62708-251-8
... of reinforcement spacing and orientation, promotion of wetting and bonding between the matrix and reinforcement, and minimization of reinforcement damage, primarily due to chemical reactions between the matrix and reinforcement. The interface between the reinforcement and matrix is important in determining...