Method for making polycrystalline sandwich compacts
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United States of America Patent
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Apr 23, 1991
Grant Date -
N/A
app pub date -
Nov 30, 1988
filing date -
Nov 30, 1988
priority date (Note) -
Expired
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Abstract
Disclosed is a method for manufacturing a polycrystalline sandwich compact comprising a polycrystalline diamond or CBN core interposed between outer support layers. The method comprises providing an assembly comprising a mass of diamond or CBN particles, a pair of compression disks, and two metal layers, one of each of which is interposed between said mass and each said compression disk. When said mass comprises diamond particles, a source of sintering aid/catalyst for diamond sintering also is provided in the assembly and optionally for CBN particles a source of sintering aid/catalyst for CBN sintering is provided in said assembly. The assembly then is subjected to HP/HT sintering for forming a sintered polycrystalline diamond or CBN core having two metal-derived support layers adherently bound thereto.
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