Composite materials based on boron carbide, titanium diboride and elemental carbon and processes for the preparation of same
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United States of America Patent
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Aug 6, 1996
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N/A
app pub date -
May 24, 1994
filing date -
Jun 11, 1993
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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.
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