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POLYCRYSTALLINE DIAMOND COMPACTS HAVING LEACH DEPTHS SELECTED TO CONTROL PHYSICAL PROPERTIES AND METHODS OF FORMING SUCH COMPACTS
POLYCRYSTALLINE DIAMOND COMPACTS HAVING LEACH DEPTHS SELECTED TO CONTROL PHYSICAL PROPERTIES AND METHODS OF FORMING SUCH COMPACTS
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机译:具有选择浸出深度以控制物理性能的多晶金刚石复合材料和形成这种复合材料的方法
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摘要
A method of forming a polycrystalline diamond compact includes forming a polycrystalline diamond material at a temperature and a pressure sufficient to form diamond-to-diamond bonds in the presence of a catalyst; substantially removing the catalyst from a volume of the polycrystalline diamond material from a first surface to a first leach depth; and substantially removing the catalyst from a volume of the polycrystalline diamond material from a second surface to a second, different leach depth. A polycrystalline diamond compact includes a polycrystalline diamond material having a first volume, a second volume, and a boundary between the first volume and the second volume. The first volume includes a catalyst disposed in interstitial spaces between diamond grains. The second volume is substantially free of the catalyst. The boundary's location is selected to control thermal stability and/or impact resistance.
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