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Ignition

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Image
Published: 01 June 1983
Figure 10.3 Minimum ignition temperatures forseveral nonmetals as a function of oxygen pressure ( Schmidt and Forney, 1975 ). Materials: A — polytetrafluoroethylene, A — polychlorotrifluoroethylene, C — polyamide, D — polychlorobutadiene, E — polymethylmethacrylate, F — fiberglass-filled More
Image
Published: 01 December 2009
Fig. 10.5 Detonator fuse explosive train. The electric detonator ignites an explosive transfer mechanism, which fires detonator A. This fires across a 0.30 in. gap to ignite detonator B, which then ignites the linear charges. More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1983
DOI: 10.31399/asm.tb.mlt.t62860343
EISBN: 978-1-62708-348-5
... and rank materials for use in liquid oxygen or liquid fluorine systems, and literally hundreds of materials have been tested. Compatibility tests generally fall into one of two categories: tests that determine the sensitivity of a material to ignition and combustion and tests that measure the intensity...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780159
EISBN: 978-1-62708-281-5
... methods are classified in two ways: by fire response characteristics and by particular applications of polymeric materials. fire resistance flammability test polymers A MATERIAL IS FLAMMABLE if it is subject to easy ignition and rapid flaming combustion. Combustion is defined as an oxidation...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780171
EISBN: 978-1-62708-268-6
... of the potential failure causes: Cartridge ignition simultaneity: The team knew that two cartridges generated pressure to move the piston. They suspected that failure of the cartridges to fire simultaneously would degrade performance. The team recognized the need to determine if nonsimultaneous firing had...
Image
Published: 01 December 2003
Fig. 3 Apparatus used in ASTM E 162. (1) Temperature sensor. (2) Exhaust stack. (3) Igniter. (4) Test specimen. (5) Radiant panel. Source: Ref 15 More
Image
Published: 01 December 2009
Fig. 10.7 Hurled plate formation. When the detonator fires, it shears the aluminum cup at its output end, creating a plate that is hurled across a gap. When this plate strikes the next explosive train component, kinetic energy ignites it. More
Image
Published: 01 August 2005
Fig. 1.29 A quite remarkable photograph of a self-propagating high-temperature synthesis (SHS) reaction moments after ignition of a foil of a proprietary metal combination. The excess energy is sufficient to heat the foil to white heat. Courtesy of Maximilian Franz More
Image
Published: 01 April 2013
Fig. 9 Comparison of (a) computed tomography (CT) system and a CT image at the height of the flaw shows the flaw in more detail and in a form an inexperienced viewer can readily recognize; (b) radiography system and a high quality digital radiograph of a solid rocket motor igniter shows a serious More
Image
Published: 01 December 2003
Fig. 4 Typical equipment used for the limiting oxygen index test (ASTM D 2863). (1) Burning specimen. (2) Clamp with rod support. (3) Igniter. (4) Wire screen. (5) Ring stand. (6) Glass beads in a bed. (7) Brass base. (8) Tee. (9) Cut-off-valve. (10) Orifice in holder. (11) Pressure gage. (12 More
Image
Published: 01 September 2011
Fig. 9.2 Composite pressure vessel nomenclature Composite case nomenclature Fwd and aft port openings (D F , D A ) End fitting or polar boss (opening attach feature for nozzle/igniters) Diameter (D): Twice the radius (either local or cylinder) Overall length (L = OAL More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270126
EISBN: 978-1-62708-301-0
... will be turned back to envelope this end over the stem. There is no way of igniting the fuel at this point. When the heat radiated from the turbine heats the diffuser parts to match the flash point of the fuel, it can become ignited, stabilizing a flame around the stem causing it to burn. This flame might...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780081
EISBN: 978-1-62708-268-6
... starts to rotate, and the dispenser rotational speed controls the submunition pattern on the ground. Firing of the linear charges is controlled by a dispenser fuse with an explosive train, as shown in Fig. 10.5 . Fig. 10.5 Detonator fuse explosive train. The electric detonator ignites...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230107
EISBN: 978-1-62708-298-3
..., for instance, in the accurate determination of beryllium in a high-grade ore. Two main procedures are employed, based either on the precipitation of beryllium hydroxide [ Vinci 1962 , Brewer 1952 , Rogers and Prather 1959 ] or beryllium ammonium phosphate [ Huré et al. 1952 ]. The precipitate is ignited...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870401
EISBN: 978-1-62708-314-0
... molecular weight polyethylene are relatively nonflammable; however, at high temperatures they soften, char, or melt, and their mechanical strength is reduced. Composite laminates tend to burn in layers. When heated, the resin in the first layer degrades, and any combustible products formed are ignited...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780019
EISBN: 978-1-62708-268-6
... so it cannot be fired if the trigger is accidentally pulled, and many others. Even the cartridge mentioned previously is a system consisting of the projectile, the propellant, the primer, and the cartridge case. The purpose of this system is to carry and ignite the propellant to launch...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900071
EISBN: 978-1-62708-350-8
... that the voltage has failed to support the plasma ignition at that particular pressure. In addition, high-temperature areas can occur at sharp corners, often resulting in localized overheating and even burning. If the pressure is too low (i.e., toward high vacuum), then the glow seam around the part will be very...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300163
EISBN: 978-1-62708-323-2
... in their microstructure that make them easy to machine also make these alloys prone to wear. Door keys and ignition keys for vehicles are often made from yellow brass. Keys rub on tumblers that are often made from brass. Keys wear—an ignition key on an automobile may wear out before the vehicle. This is one...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900219
EISBN: 978-1-62708-350-8
... nitrocarburizing process involves a combustible atmosphere that is explosive when operated below the self-ignition temperature, safety precautions must be rigorously enforced. It is mandatory that all safety purge systems are in place and fully operable and that the correct purge sequencing has occurred before...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900089
EISBN: 978-1-62708-350-8
... so that the arc is suppressed. Interruption of the arc will be possible during each pulse. The pause that follows each pulse should be short enough to allow an easy ignition for the next pulse—for example, less than 1 μs. The ratio of pulse to pause should be variable over a wide range...