Infiltration processing of boron carbide-, boron-, and...

Details Infiltration processing of boron carbide-, boron-, and... Infiltration processing of boron carbide-, boron-, and...

C - Chemistry, Metallurgy

04

B

22/175

C04B 41/88 (2006.01) C04B 35/563 (2006.01) C04B 35/65 (2006.01) C04B 38/00 (2006.01) C04B 41/51 (2006.01) C22C 1/10 (2006.01) C22C 29/00 (2006.01)

Patent

CA 1290134

INFILTRATION PROCESSING OF BORON CARBIDE-, BORON-, AND BORIDE- REACTIVE METAL CERMETS ABSTRACT Of THE INVENTION A chemical pretreatment method is used to produce boron carbide-, boron-, and boride-reactive metal composites by an infiltration process. The boron carbide or other starting constituents, in powder form, are immersed in various alcohols, or other chemical agents, to change the surface chemistry of the starting constituents. The chemically treated starting constituents are consoli- dated into a porous ceramic precursor which is then infil- trated by molten aluminum or other metal by heating to wetting conditions. Chemical treatment of the starting constituents allows infiltration to full density. The infiltrated precursor is further heat treated to produce a tailorable microstructure. The process at low cost pro- duces composites with improved characteristics, including increased toughness, strength.

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