Composite polycrystalline diamond compact with improved impact resistance
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United States of America Patent
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Apr 30, 1991
Grant Date -
N/A
app pub date -
Aug 7, 1989
filing date -
Aug 7, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A compact blank for use in operations that require very high impact strength and abrasion resistance is disclosed. The compact comprises a substrate formed of tungsten carbide or other hard material with a diamond or cubic boron nitride layer bonded to the substrate. The interface between the layers is defined by topography with irregularities having non-planar side walls such that the concentration of substrate material continuously and gradually decreases at deeper penetrations into the diamond layer.
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