Polycrystalline diamond cutters sintered with magnesium carbonate in cubic anvil press |
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| Affiliation: | 1. Element Six UK Ltd, Global Innovation Centre, OX11 0QR, Harwell Oxford, UK;2. University College Dublin, School of Mechanical & Materials Engineering, Dublin, Ireland;1. Centre for High Resolution TEM, Department of Physics, Nelson Mandela Metropolitan University, Port Elizabeth, South Africa;2. DST/NRF Centre of Excellence in Strong Materials at School of Chemical Engineering and Metallurgy, University of the Witwatersrand, Johannesburg, South Africa;1. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China;2. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China;1. School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, PR China;2. Key Laboratory on Deep Geo-drilling Technology of the Ministry of Land and Resources, China University of Geosciences (Beijing), Beijing 100083, PR China |
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| Abstract: | Polycrystalline diamond cutters (PDC) were sintered with magnesium carbonate (MgCO3) around 8 GPa and 2200–2400 °C in a single-stage cubic anvil press. Different analyzing techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS) were applied to characterize the micro-structure, sintering behavior, and composition of the diamond-MgCO3 system. Wear resistance, thermal stability, and rupture strength of MgCO3-sintered PDC were compared against conventional cobalt-sintered PDC. An improvement in performance was observed from our laboratory tests, which may enable MgCO3-sintered PDC to be a functional superhard material for the cutting, drilling, and machining industries. |
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