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directed metal oxidation

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Published: 01 November 2010
Fig. 21.19 Directed metal oxidation process. Aluminum (Al), chemical vapor deposition (CVD) More
Image
Published: 01 October 2012
Fig. 11.27 Schematic of the directed metal oxidation process. CMC, ceramic-matrix composite. Courtesy of Lanxide Corporation. Source: Ref 11.11 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870573
EISBN: 978-1-62708-314-0
... and pyrolysis, chemical vapor infiltration, directed metal oxidation, and liquid silicon infiltration. ceramic matrix composites chemical vapor infiltration directed metal oxidation liquid silicon infiltration polymer infiltration and pyrolysis slurry infiltration MONOLITHIC CERAMIC MATERIALS...
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 August 2013
DOI: 10.31399/asm.tb.ems.t53730129
EISBN: 978-1-62708-283-9
.... This has led to their use in architecture and sculpture. Direct Oxidation Direct oxidation of most metals in the absence of water occurs only at high temperature. It might seem that high-temperature oxidation would not involve an electrolytic cell. However, there is an anode and cathode. The anode...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220009
EISBN: 978-1-62708-259-4
... reduction processes. As iron in the ores is in an oxidized state (Fe +3 , Fe +2 ), the chemical reaction that transforms it into metallic iron (Fe 0 ) is a reduction reaction, and such processes are therefore called reduction processes. 2.1.1 The Blast Furnace The classical process for reduction...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940001
EISBN: 978-1-62708-302-7
... in the chemical process industry Corrosion of automobile exhaust systems by direct reaction of the metal with high-temperature gases and by condensation of water and absorption of the oxides of sulfur and nitrogen to produce aqueous acid environments Corrosion of turbine blades in gas turbines by hot...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030165
EISBN: 978-1-62708-282-2
... cathodic protection corrosion behavior galvanic couples coatings corrosion inhibitors CORROSION is an oxidation reaction where the corroding metal is the anode in an electrochemical cell. In addition to the anode, there are three other components that are necessary for corrosion to occur...
Image
Published: 01 November 2007
Fig. 5.57 Mechanism of metal dusting for chromia formers with the following steps: (a) Development of local defects in the oxide scale, allowing carbon transfer from the environment to the metal, (b) carbon ingress into the metal resulting in the formation of stable carbides, M 23 C 6 and M 7 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060223
EISBN: 978-1-62708-343-0
...-matrix composite and its constituents. (a) Cold, stress free. (b) Hot (+Δ T ), unbonded. (c) Hot (+Δ T ), bonded Fig. 9.3 Cyclic strain resistance (from Δ T = 425 °C, or 800 °F) of SCS-6/Ti-15-3 metal-matrix composite in [0]32 direction with k f = 0.35. Source: Ref 9.3 Fig. 9.1...
Image
Published: 01 August 1999
×. (c) Lamellar tear initiated at groups of angular oxide inclusions. 1% nital. 250×. (d) Semikilled carbon-manganese steel. Testpiece (cut in short transverse direction) containing large elongated silicate inclusions. 8% reduction of area. Unetched. 500×. (e) Semikilled, aluminum-treated carbon More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200187
EISBN: 978-1-62708-354-6
.... Induction charges must be clean and dry to avoid the pick-up of hydrogen. Since relatively little refining occurs during melting, the charge chemistry is the same as the desired final chemistry. Refining Reactions During the initial melting of the metal, oxidation of Al, Si, Mn, and Cr may occur...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140047
EISBN: 978-1-62708-335-5
..., and shorter reaction times to achieve low hydrogen levels. The use of active fluxing gases and filtration removes oxides, permitting acceptable quality castings to be produced from metal with higher hydrogen contents. 5.2 Shrinkage Porosity For most metals, the transformation from the liquid...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940087
EISBN: 978-1-62708-302-7
... rate expressed as current density; and ΔG* el,ox = G* el – G el,M o = electrochemical free energy of activation for the oxidation reaction. Since G el = G + mF ϕ, G* el = G* + mFϕ*, and from Fig. 3.6 it is seen that in the oxidation direction (i.e., on going from the metal to the activated...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910497
EISBN: 978-1-62708-250-1
... in the rain. See also atmo- spheric corrosion. active. The negative direction of electrode potential. Also used to de- scribe corrosion and its associated potential range when an electrode potential is more negative than an adjacent depressed corrosion rate (passive) range. active metal. A metal ready...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740001
EISBN: 978-1-62708-308-9
... reduces to metallic iron from iron because the free energies of CO and CO 2 are both lower than that of iron oxide. This greatly increases the temperature and provides the required carbon for steelmaking. The resulting liquid iron is tapped at regular intervals by opening a hole in the bottom...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.9781627082501
EISBN: 978-1-62708-250-1
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910049
EISBN: 978-1-62708-250-1
... electrons are left at the iron surface for each iron atom that becomes a ferrous ion. This type of reaction is equivalent to corrosion and results in metal loss. When at equilibrium, the reaction proceeds at the same rate in both directions, and there is no net change in ferrous ion concentration...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030380
EISBN: 978-1-62708-282-2
... (negative) direction due to current ow. See also polarization. cathodic protection. (1) Reduction of corrosion rate by shifting the potential of the electrode toward a less oxidizing potential with an externally applied voltage. (2) Partial or complete protection of a metal from corrosion by making...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.9781627082822
EISBN: 978-1-62708-282-2