Boron carbide composite bodies, and methods for making same

Details Boron carbide composite bodies, and methods for making same Boron carbide composite bodies, and methods for making same

2007-04-03

2007-04-03

Johnson, Stephen M. (Department: 3641)

Ordnance

Shields

Shape or composition

Reexamination Certificate

active

11073975

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: 4981822 (1991-01-01), 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: 6503572 (2003-01-01), Waggoner et al.
patent: 6805034 (2004-10-01), McCormick et al.
patent: 6862970 (2005-03-01), Aghajanian et al.
patent: WO 00/062007 (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.

Affiliated with

Also associated with

Rating

Boron carbide composite bodies, and methods for making same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Boron carbide composite bodies, and methods for making same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Boron carbide composite bodies, and methods for making same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3784952