Plasma pressure compaction of nanodiamond |
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| Affiliation: | 1. Materials Science and Engineering Department and A. J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, PA 19104, USA;2. Orise Appoitnee, U.S. Army Research Laboratory, Weapons and Materials Research Directorate, Aberdeen Proving Ground, MD 21005-5069, USA;3. U.S. Army Research Laboratory, Weapons and Materials Research Directorate, Aberdeen Proving Ground, MD 21005-5069, USA;4. School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245, USA |
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| Abstract: | Detonation synthesized nanodiamond (ND) was sintered using a Plasma Pressure Compaction (P2C) technique. Sintering was performed for 1 min at temperatures between 700 and 1200 °C, and for 1–10 min at 900 °C under 65 MPa pressure. Structure and composition of the sintered samples were analyzed by X-ray diffraction, transmission electron microscopy and Raman microspectroscopy. The selected sintering conditions prevent excessive graphitization of diamond and allow formation of porous pellets having the density of 1.3–1.6 g/cm3, hardness > 0.1 GPa and Young's modulus > 3 GPa. The sintered ND pellets with porosity of about 50% have mechanical properties sufficient for handling and can be infiltrated to produce ND composites. |
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