Composite materials based on boron carbide, titanium diboride an

Details Composite materials based on boron carbide, titanium diboride an Composite materials based on boron carbide, titanium diboride an

1994-05-24

1996-08-06

Turner, A. A.

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 87, 501 96, 501 99, 428698, C04B 3552

Patent

active

055433707

ABSTRACT:
A composite material includes boron carbide and titanium diboride in a volume ratio B.sub.4 C/TiB.sub.2 of from 90:10 to 10:90 parts and a proportion of elemental carbon greater than 2% by weight up to a maximum of 50% by weight, based on the boron carbide content. The composite material has a density greater than 92% TD, a hardness HK 0.1 greater than 2300, a four-point flexural strength greater than 400 MPa and a fracture toughness greater than 3.5 MPa.sqroot.m. The composite material is suitable for producing wear-resistant components or cutting tools.

REFERENCES:
patent: Re23789 (1954-02-01), Montgomery et al.
patent: 4379852 (1983-04-01), Watanabe et al.

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