PROVIDING A CATLYST FREE DIAMOND LAYER ON DRILLING CUTTERS
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United States of America Patent
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Issued Date -
Jun 5, 2014
app pub date -
Dec 5, 2012
filing date -
Dec 5, 2012
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Abstract
A method of making a polycrystalline diamond compact including providing a layer of graphene on top of a sintered PCD and transforming the graphene at high pressure and temperature into diamond that is free of metal catalyst. A method of making PCD by providing a layer of graphene powder on top of a layer of diamond powder and sintering at high pressure and temperature to transform the graphene into diamond that is free of metal catalyst at the surface.
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