Composite body comprising a hard metal, cermet or ceramic substrate body and method of producing same
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United States of America Patent
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Jun 19, 2001
Grant Date -
N/A
app pub date -
Jun 3, 1999
filing date -
Dec 24, 1996
priority date (Note) -
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Abstract
The invention concerns a composite body consisting of a hard metal, cermet or ceramic substrate body and at least one layer of a mechanically resistant material, a ceramic substance, a diamond-like layer, amorphous carbon and/or hexagonal boron nitride. The invention also concerns a method of producing this composite body, wherein, when the green compact has been dewaxed, with its pores still open and whilst it continues to be heated as from a temperature of between 600.degree. C. and 1100.degree. C., it is acted upon by sublimable solids and/or reaction gases which are necessary for coating purposes. The temperature of the green compact is then further increased and the latter is fully compressed by sintering, before one or more layers of the above-mentioned type is/are applied.
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