Polycrystalline diamond element with unleached side surface and system and method of controlling leaching at the side surface of a polycrystalline diamond element
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United States of America Patent
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May 17, 2016
Grant Date -
Nov 7, 2013
app pub date -
May 1, 2012
filing date -
May 1, 2012
priority date (Note) -
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Abstract
The disclosure provides a PCD element containing a substrate and a PCD layer. The PCD has a top surface, a side surface, an intermediate surface, an unleached region containing a diamond body matrix and an interstitial matrix including a catalyst, and a leached region containing a diamond body matrix and empty space in the place of the interstitial matrix. The catalyst has been leached from the empty space in the place of the interstitial matrix. The unleached region is adjacent to a substantial portion of the side surface and the leached region is not adjacent to a substantial portion of the side surface, and the leached region is adjacent to the top surface or the intermediate surface. The disclosure also provides a system and method for leaching a PCD element including a liquid able to leach a catalyst and a protective member.
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