Polycrystalline superhard material
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United States of America Patent
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Sep 1, 2015
Grant Date -
Aug 8, 2013
app pub date -
Apr 20, 2011
filing date -
Apr 23, 2010
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Abstract
A polycrystalline superhard material comprises a sintered mass of superhard grains having a mean superhard grain contiguity of at least 62 percent and at most 92 percent. There is also disclosed a method of making such a polycrystalline superhard material. The method comprises providing a precursor body comprising superhard grains and interstices between the superhard grains, and introducing additive particles into the interstices to form a pre-sinter body. The pre-sinter body is submitted to a temperature and pressure at which superhard material is thermodynamically stable, sintering it and forming polycrystalline superhard material.
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