Download PDF by Lisa Prokurat Franks, Jonathan Salem, Dongming Zhu: Advances in Ceramic Armor III: Ceramic and Engineering

By Lisa Prokurat Franks, Jonathan Salem, Dongming Zhu

ISBN-10: 047019636X

ISBN-13: 9780470196366

ISBN-10: 0470339691

ISBN-13: 9780470339695

Papers from the yank Ceramic Society's thirty first foreign convention on complicated Ceramics and Composites, held in Daytona seashore, Florida, January 21-26, 2007. issues comprise obvious ceramics for impression resistance, defense opposed to mine blast and fragments, demanding situations dealing with ceramic armor brands, novel fabric recommendations and improvement of legitimate armor layout and characterization instruments to foretell functionality for air and floor cars in addition to the person soldier.Content:

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Extra resources for Advances in Ceramic Armor III: Ceramic and Engineering Science Proceedings, Volume 28, Issue 5

Example text

Ofcoiuse. bound to an upper size limit and becomes invalid uhen instead ofcommon fragmentation the ceramic would fracture intojust a few-large pieces). ticliriiii Hardness is the resistance of the ceramic against localizedplosfic deformation. Regarding the dynaiiiic character of the abrasive interaction the question arises whether in the present discussion the sfutic hardness should be substituted by the dynamically measured Hugoniot elastic limit (HEL). Fig. 5 shows a close correlation of these two parameters covering all oxide and nonoxide armor ceramics with most different grain sizes.

The same should hold by similar reasons for the critical stress intensity Kit. On the other hand. y. different ceramics shall be distinguished by a ranking of their quality. Nevertheless. Fig 6 does not incorporate the compressive strength because it is regarded as a mere coniposite parameter that is determined in a complicated way by stiffness (+ Young's ~ other basic parameters. Therefore and modulus). flaw- population (+ tensional strength). K I and regarding the general relationship between compressive deformation, Young's modulus and hardness it is assumed here that a n additional introduction o f t h e compressive strength into Fig 6 v-ould rather obscure than contribute to the physical figure of this hierarchy.

69. 5 was used for static and dynamic fracture toughness measurenieiits. To study the influence of strain rate on the indentation induced crack patterns. static and dynamic indentation experiments were also 32 . Advances in Ceramic Armor 111 Static and Dynamic Indentation Response of Fine Grained Boron Carbide conducted on the polished and etched boron carbide specimens. Then scanning electron microscopy was performed to observe the crack patterns. 3. 1 Density and microstructure Boron carbide disks sintered at 1750°C for 2 niin achieved only 96% of the theoretical densit) The porosity associated with this disk is clearly seen on the fracture surfaces shoun i n Fig.

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Advances in Ceramic Armor III: Ceramic and Engineering Science Proceedings, Volume 28, Issue 5 by Lisa Prokurat Franks, Jonathan Salem, Dongming Zhu


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