The effect of manufacturing conditions on residual stress in polycrystalline diamond cutters

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Polycrystalline diamond cutters are ultra-hard tools used for oil and gas drilling. They are produced by sintering diamond particles at High Pressure (5.5+ GPa) and High Temperature (1300+ K). After synthesis, the cutter is returned to room temperature and pressure. The significant mismatches in thermal expansion coefficient and stiffness between the diamond table and the tungsten carbide substrate result in residual stresses. The magnitude and distribution of these residual stresses is believed to impact cutter...
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