Magnetic Pulsed Compaction(MPC)법으로 성형된 Cu 나노 분말 성형체의 미세구조 및 기계적 특성
Nanostructures and Mechanical Properties of Copper Nano Powder Compacted by Magnetic Pulsed Compaction (MPC) Method
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Abstract
Nano Cu powders, synthesized by Pulsed Wire Evaporation (PWE) method, have been compacted by Magnetic Pulsed Compaction(MPC) method. The microstructure and mechanical properties were analyzed. The optimal condition for proper mechanical properties with nanostructure was found. Both pure nano Cu powders and passivated nano Cu powders were compacted, and the effect of passivated layer on the mechanical properties was investigated. The compacts by MPC, which had ultra-fine and uniform nanostructure, showed higher density of 95% of theoretical density than that of static compaction. The pure and passivated Cu compacted at 300℃ exhibited maximum hardnesses of 248 and 260 Hv, respectively. The wear resistance of those compacts corres-ponded to the hardness.