POLYCRYSTALLINE DIAMOND CONSTRUCTION AND METHOD OF MAKING SAME
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United States of America Patent
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Aug 28, 2013
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Aug 31, 2012
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Abstract
A polycrystalline diamond construction comprising a body of polycrystalline diamond material is formed of a mass of diamond grains exhibiting inter-granular bonding and defining a plurality of interstitial regions therebetween, and a non-diamond phase at least partially filling a plurality of the interstitial regions to form non-diamond phase pools, the non-diamond phase pools each having an individual cross-sectional area. The percentage of non-diamond phase in the total area of a cross-section of the body of polycrystalline diamond material and the mean of the individual cross-sectional areas of the non-diamond phase pools in the image analysed using an image analysis technique at a selected magnification is less than 0.7, or less than 0.340 microns squared, or between around 0.005 to 0.340 microns squared depending on the percentage of non-diamond phase in the total area of the cross-section of the polycrystalline diamond construction. The body of polycrystalline material in the construction has a cutting surface having a surface topology comprising one or more indentations therein and/or projections therefrom. There is also disclosed a method of making such a construction.
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