Predescu Andra Mihaela, Vidu Ruxandra, Vizureanu Petrică, Predescu Andrei, Matei Ecaterina, Predescu Cristian
Faculty of Materials Science and Engineering, University POLITEHNICA of Bucharest, RO-060042 Bucharest, Romania.
Department of Electrical and Computer Engineering, University of California Davis, Davis, CA 95616, USA.
Materials (Basel). 2020 Jul 10;13(14):3086. doi: 10.3390/ma13143086.
Copper matrix nanocomposites reinforced with magnetite nanoparticles were developed using powder metallurgy. Various processing parameters were taken into consideration, such as magnetite content, compaction pressure, sintering time and temperature. The nanopowder blends were compacted using various uniaxial pressures and sintered at 650 and 800 °C in order to study the influence of processing parameters on morphology, structure, thermal, magnetic and mechanical properties. The structure and morphology of the nanocomposites analyzed by X-ray diffraction (XRD), bright field transmission electron microscopy (TEMBF) and scanning electron microscopy (SEM) showed that sintered composites retained the nanoscale characteristics of the initial FeO and Cu nanopowders. These nanocomposites have good cold-rolling deformability and Vickers micro-hardness. The Cu-xFeO nanocomposites have thermal and magnetic properties that make them suitable for electronical applications.
采用粉末冶金法制备了用磁铁矿纳米颗粒增强的铜基纳米复合材料。考虑了各种加工参数，如磁铁矿含量、压制压力、烧结时间和温度。为了研究加工参数对形态、结构、热、磁和力学性能的影响，将纳米粉末混合物在不同的单轴压力下压制，并在650℃和800℃下烧结。通过X射线衍射（XRD）、明场透射电子显微镜（TEMBF）和扫描电子显微镜（SEM）分析的纳米复合材料的结构和形态表明，烧结后的复合材料保留了初始FeO和Cu纳米粉末的纳米级特征。这些纳米复合材料具有良好的冷轧变形性和维氏显微硬度。Cu-xFeO纳米复合材料具有的热性能和磁性能使其适用于电子应用。
