Composite material and method for production thereof
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United States of America Patent
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Issued Date -
Jul 22, 2004
app pub date -
Nov 17, 2003
filing date -
May 16, 2001
priority date (Note) -
Abandoned
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Abstract
The invention relates to a composite material, comprising a hard metal or cermet substrate body, coated with at least one diamond layer. According to the invention, the adhesion of the diamond layer on fine-grained hard metal or cermet substrate bodies may be improved, whereby the C content of the hard metal or cermet substrate body lies between 89% and 99%, preferably between 94% and 99% of the maximum possible content at which C porosity occurs, or, for hard metal substrate bodies with Co binder, the magnetic saturation polarisation is 89 to 99%, preferably 94 to 99% of the maximum saturation polarisation 4 .pi. .sigma.max=2Co-2,2 Cr3C2, (Co and Cr3C2 each given in mass % and 4 .pi. .sigma.max in .mu.T.m3.kg-1).
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