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METHODS FOR FABRICATING POLYCRYSTALLINE DIAMOND COMPACTS USING AT LEAST ONE PREFORMED TRANSITION LAYER AND RESULTANT POLYCRYSTALLINE DIAMOND COMPACTS
METHODS FOR FABRICATING POLYCRYSTALLINE DIAMOND COMPACTS USING AT LEAST ONE PREFORMED TRANSITION LAYER AND RESULTANT POLYCRYSTALLINE DIAMOND COMPACTS
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机译:至少使用一个预制的过渡层和所得的多晶金刚石压片来制造多晶金刚石压片的方法
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摘要
Embodiments relate to polycrystalline diamond compacts (“PDCs”) that are less susceptible to liquid metal embrittlement damage due to the use of at least one transition layer between a polycrystalline diamond (“PCD”) layer and a substrate. In an embodiment, a PDC includes a PCD layer, a cemented carbide substrate, and at least one transition layer bonded to the substrate and the PCD layer. The at least one transition layer is formulated with a coefficient of thermal expansion (“CTE”) that is less than a CTE of the substrate and greater than a CTE of the PCD layer. At least a portion of the PCD layer includes diamond grains defining interstitial regions and a metal-solvent catalyst occupying at least a portion of the interstitial regions. The diamond grains and the catalyst collectively exhibit a coercivity of about 115 Oersteds or more and a specific magnetic saturation of about 15 Gauss·cm3/grams or less.
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