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Transparent ceramic composite

a ceramic composite and composite material technology, applied in the field of ceramic composites, can solve the problems of high cost, heavy weight, and thick composite materials, and ceramic composites have not been widely used as transparent armor

Inactive Publication Date: 2007-03-29
SAINT GOBAIN CERAMICS & PLASTICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011] In another aspect, a composite transparent armor is provided, the armor capable of preventing the penetration of a 7.62 mm×51 M80 ball traveling at a velocity of 835 m / s, the armor exhibiting an areal density of less than about 150 kg / m2.
[0019] In another aspect, a composite transparent armor is provided, the armor capable of preventing the penetration of a 7.62×51 AP (M61) projectile traveling at a velocity of 768 m / s, the armor having a luminous transparency of at least 75%.

Problems solved by technology

However, to provide sufficient transparency and strength, these composites may be thick, heavy, and expensive and may only be available in small sizes that provide for limited viewing areas.
As a result, ceramic composites have not been widely used as transparent armor.

Method used

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  • Transparent ceramic composite
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Examples

Experimental program
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Effect test

examples

[0064] Several samples of sapphire composites were built and evaluated via ballistic testing to determine their effectiveness as transparent armor. Results show that ceramic based transparent composites, as described herein, can be effective at preventing the penetration of a variety of projectiles including single and multiple shots. Furthermore, this level of protection can be obtained at areal densities and thicknesses that are below those of conventional glass type armor.

[0065] Eleven different projectile tests were run on two different composite laminates. Each laminate had a length of 150 mm and a width of 150 mm. Sapphire sheets of these sample laminates are produced by edge defined film fed growth techniques unless otherwise specified.

[0066] Each composite was produced as follows. The component layers were stacked together and secured with tape and placed in a vacuum bag. A vacuum was applied to the bag which was then placed in an autoclave where pressure of about 8 bars (...

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Abstract

A ceramic composite and method of making are provided. The ceramic composite may be transparent and may serve as transparent armor. The ceramic portion of the composite may be single crystal sapphire. The composite may provide adequate protection from projectiles while exhibiting large surface areas and relatively low areal densities.

Description

RELATED APPLICATIONS [0001] This application claims benefit of U.S. Provisional Patent Application Ser. No. 60 / 689,688, titled TRANSPARENT CERAMIC COMPOSITE, filed Jun. 10, 2005 and U.S. Provisional Patent Application Ser. No. 60 / 761,814, titled TRANSPARENT CERAMIC COMPOSITE, filed Jan. 25, 2006.BACKGROUND OF INVENTION [0002] 1. Field of Invention [0003] The present invention relates to ceramic composites and, in particular, to transparent ceramic armor. [0004] 2. Discussion of Related Art [0005] Ceramics exhibit a variety of properties that make them useful in products subjected to, for example, abrasion, high temperatures or high speed impacts. An excellent strength to weight ratio and superior hardness mean that ceramics can often replace and improve on structural materials such as steel, polymers and glass. Ceramic composites are materials that include a ceramic bonded to another ceramic or to a non-ceramic material. For example, a ceramic sheet can be bonded to glass or plastic...

Claims

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Application Information

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IPC IPC(8): F41H5/02
CPCB32B17/10009B32B17/10045B32B17/10761B32B17/1077F41H5/0428B32B2369/00F41H5/0407F41H5/0414B32B17/10853B33Y30/00
Inventor JONES, CHRISTOPHER D.RIOUX, JEFFREY B.LOCHER, JOHN W.CARLSON, ERIC S.FARRELL, KATHLEEN R.FURCHNER, BRIAN C.PLUEN, VINCENTMANDELARTZ, MATTHIAS
Owner SAINT GOBAIN CERAMICS & PLASTICS INC
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