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disintegration

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Image
Published: 01 January 2005
Fig. 22 Gr/AZ91C/AZ31B Mg metal-matrix composite disintegrating in laboratory air after 15 years exposure More
Image
Published: 01 December 1998
Fig. 2 Uniform-layer dezincification in an admiralty brass heat-exchanger tube. The top layer of the micrograph, which consists of porous, disintegrated particles of copper, was from the inner surface of the tube that was exposed to water at pH 8.0, 31 to 49 °C (87 to 120 °F), and 207 kPa (30 More
Image
Published: 01 January 2005
Fig. 13 Behavioral difference in seemingly similar composites from different lots. (a) Gr/6061-T6 Al metal-matrix composite (MMC), fabricated by the TiB 2 vapor deposit method, disintegrating in laboratory air after more than 10 years exposure. (b) Gr/Al MMC, processed by the same method More
Image
Published: 01 January 2003
the bottom external surface where the pipe rested on the soil. The small-diameter piece in the foreground is a gray iron pump impeller on which the impeller vanes have disintegrated because of graphitic corrosion. Courtesy of Robert D. Port. Permission granted by Nalco Chemical Company, 1987 More
Image
Published: 01 January 2003
Fig. 3 Uniform-layer dezincification in an admiralty brass 19 mm ( 3 4 in.) diameter heat-exchanger tube. The top layer of the micrograph, which consists of porous, disintegrated particles of copper, was from the inner surface of the tube that was exposed to water at pH 8.0, 31 to 49 More
Image
Published: 01 December 2004
, the continuous nickel fibers break into short pieces or disintegrate into rows of spherical particles. 1000× More
Image
Published: 01 January 2005
Fig. 34 A metal screen used to retain insulation to the inlet box of a gas cooler system in an acid plant disintegrated after a few months' service. The heat-resistant alloy UNS N08330 (Fe-35Ni-19Cr-1.2Si-0.05C) was selected on the basis that the incoming gases (approximately 80% N, 11% O, 9.5 More
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001749
EISBN: 978-1-62708-178-8
..., and its measurement can be used to identify the nuclide in the absence of more sophisticated methods. That the half-life is a constant for a given radioactive isotope leads directly to the simple basis for radioanalysis. The disintegration rate D of a given isotope in a sample is directly...
Book Chapter

By Bo Hu
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006102
EISBN: 978-1-62708-175-7
... of iron powders (95% <45 μm, or 1.8 mils) produced from different manufacturing processes. (a) Atomized iron. (b) Reduced iron. (c) Electrolytic iron. (d) Carbonyl iron. Top row: SEM images; bottom row: cross section optical microscope images Atomized iron powder is produced with disintegrating...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006066
EISBN: 978-1-62708-175-7
... sensitization process was employed for commercial production of stainless steel powders. This process employed intentionally sensitized wrought stainless sheets (chromium depleted at grain boundaries), which were then disintegrated into powder particles by leaching in an acid. The powder particles were...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001391
EISBN: 978-1-62708-173-3
... is an intermetallic compound that forms a heterogeneous filler metal. During this type of reaction, surface oxides are either displaced or disintegrated, which can eliminate the need for protective atmospheres or fluxes ( Ref 1 ). Process Advantages and Disadvantages Exothermic brazing is most frequently used...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006065
EISBN: 978-1-62708-175-7
... and centrifugal atomization, ultrasonic or pulsed atomization, melt spinning with attrition, and mechanically alloying. Gas atomization is used for several applications. In gas atomization, a high-velocity gas jet disintegrates molten aluminum into droplets that solidify to form the powder. In the Alcoa...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006448
EISBN: 978-1-62708-190-0
... the traditional unit of a curie (1 Ci = 37 × 10 9 disintegrations per second). The corresponding unit in the Système International d’Unités (SI) system is a gigabecquerel (1 GBq = 1 × 10 9 disintegrations per second). The spectrum of radiation is often expressed in terms of photon energy rather than...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006084
EISBN: 978-1-62708-175-7
... that supplies a uniform and controlled head of molten metal to the tundish nozzle. The nozzle, which is located at the base of the tundish, controls the shape and size of the metal stream and directs it through an atomizing nozzle system in which the metal stream is disintegrated into fine droplets by the high...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006081
EISBN: 978-1-62708-175-7
... of alloying elements on compressibility Production of Iron and Steel Powder by Water Atomization Water Atomization and Annealing Atomization processes are widely used to make iron and steel powders. Atomization consists of mechanical disintegration of molten metal stream into small droplets...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001361
EISBN: 978-1-62708-173-3
... in.). Fig. 2 Initial-gap CD stud welding. See text for explanation. Source: Ref 1 Initial-Contact Mode The initial-contact mode ( Fig. 3 ) begins with the weld stud in contact with the work surface. The weld cycle is initiated with a surge of current that disintegrates the weld tip, thus...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005554
EISBN: 978-1-62708-174-0
.... 3 ) begins with the weld stud in contact with the work surface. The weld cycle is initiated with a surge of current that disintegrates the weld tip, thus melting the stud face area and the work surface that it immediately contacts. The stud is forced into the molten material, forming a strong...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006068
EISBN: 978-1-62708-175-7
..., is removed. After this the induction furnace is gradually tilted to allow the liquid metal to flow, via a runner, into the tundish. From the bottom of the tundish the molten metal emerges as a well-defined stream within the atomization chamber, in which it is disintegrated into a powder. Oxidation...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005681
EISBN: 978-1-62708-198-6
... decreases the water sorption and subsequent disintegration in water of the cured resin composite ( Ref 20 ). In addition, the coupling reaction has tremendous influence on the mechanical properties of the composite ( Ref 4 , 18 ). The most common coupling agent used in dentistry is γ...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001354
EISBN: 978-1-62708-173-3
... short to the workpiece, become superheated, and disintegrate, producing considerable spatter. Therefore, the arc length must be long enough to ensure that the drop detaches before it contacts the weld pool. However, when higher voltage values are used, the weld is likely to be unacceptable, because...