Ordnance – Shields – Shape or composition
Reexamination Certificate
2005-03-08
2005-03-08
Johnson, Stephen M. (Department: 3641)
Ordnance
Shields
Shape or composition
C109S049500
Reexamination Certificate
active
06862970
ABSTRACT:
A composite body produced by a reactive infiltration process that possesses high mechanical strength, high hardness and high stiffness has applications in such diverse industries as precision equipment and ballistic armor. Specifically, the composite material features a boron carbide filler or reinforcement phase, and a silicon carbide matrix produced by the reactive infiltration of an infiltrant having a silicon component with a porous mass having a carbonaceous component. Potential deleterious reaction of the boron carbide with silicon during infiltration is suppressed by alloying or dissolving boron into the silicon prior to contact of the silicon infiltrant with the boron carbide. In a preferred embodiment of the invention related specifically to armor, good ballistic performance can be advanced by loading the porous mass or preform to be infiltrated to a high degree with one or more hard fillers such as boron carbide, and by limiting the size of the largest particles making up the mass. The instant reaction-bonded silicon carbide (RBSC) composite bodies surpass previous RBSC's as armor materials, and in this capacity approach the ballistic performance of current carbide armor ceramics but with potentially lower cost manufacturing methods, e.g., infiltration techniques.
REFERENCES:
patent: 3205043 (1965-09-01), Taylor
patent: 3275722 (1966-09-01), Popper
patent: 3495939 (1970-02-01), Forrest
patent: 3725015 (1973-04-01), Weaver
patent: 3796564 (1974-03-01), Taylor et al.
patent: 3857744 (1974-12-01), Moss
patent: 3859399 (1975-01-01), Bailey et al.
patent: 3998646 (1976-12-01), Weaver
patent: 4019913 (1977-04-01), Weaver et al.
patent: 4104062 (1978-08-01), Weaver
patent: 4154787 (1979-05-01), Brown
patent: 4692418 (1987-09-01), Boecker et al.
patent: 4868040 (1989-09-01), Hallal et al.
patent: 4876941 (1989-10-01), Barnes et al.
patent: 4944904 (1990-07-01), Singh et al.
patent: 5180697 (1993-01-01), Claar et al.
patent: 5205970 (1993-04-01), Brun et al.
patent: 5372978 (1994-12-01), Ezis
patent: 5571758 (1996-11-01), Grossman
patent: 5840221 (1998-11-01), Lau et al.
patent: 5955391 (1999-09-01), Kameda et al.
patent: 6074750 (2000-06-01), Brun et al.
patent: 6245424 (2001-06-01), Lau et al.
patent: 30 05 586 (1981-08-01), None
patent: WO 00062007 (2000-10-01), None
Dennis J. ViechnickI, Michael J. Slavin and Morton I. KlIman, “Development and Current Status of Armor Ceramics”,Ceramic Bulletin, vol. 70, No. 6, pp. 1035-1039 (1991).
D. ViechnickI, W. Blumenthal, M. Slavin, C. Tracy, and H. Skeele, “Armor Ceramics—1987”, pp. 27-53, presented at Third TACOM Armor Coordinating Conference, Feb. 17-19, 1987, Monterey, California.
Roy C. Laible, “Ceramic Composite ArMOR”, inBallistic Materials and Penetration Mechanics, pp. 150-151, Elsevier Scientific Publishing Co., (1980).
“Reaction-Bonded Silicon Carbide”,Ceramics and Glasses Handbook, American Society for Materials, p. 293, 1990.
Aghajanian Michael K.
Liszkiewicz, Jr. Anthony F.
McCormick Allyn L.
Morgan Bradley N.
Johnson Stephen M.
M Cubed Technologies, Inc.
Ramberg Jeffrey R.
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