Preparation and Characterization of Copper-Niekel

• Published in: 武汉理工大学学报：材料科学英文版 2014 (3), p.606-611
• Main Author: WU Xiaoqiang TANG Yongjian WANG Lan AN Xuguang YI Zao SUN Weiguo
• Format: Article
• Language: English
• Subjects: 佛罗里达州; 扫描电子显微镜; 烧结温度; 直接制备; 纳米晶铜; 表征; 透射电子显微镜; 镍纳米颗粒
• ISSN: 1000-2413; 1993-0437

Copper-nickel nanoparticle was directly prepared by flow-levitation method （FL） and sintered by vacuum sintering of powder （VSP） method. Several characterizations, such as transmission electron microscopy （TEM）, scanning electron microscopy （SEM）, X-ray diffraction （XRD）, differential thermal analysis （DTA）, and energy-dispersive X-ray spectroscopy （EDX） were used to investigate the prepared nanostructures. The results of the study show that FL method could prepare high purity Cu-Ni nanocrystals of uniform spheres with size distribution between 20 and 90 nm. After sintering the bulk nanocrystalline copper-nickel has obvious thermal stability and the surface Webster hardness increases with the rising sintering temperature. At the temperature of 900 ℃, the specimen shows higher surface Webster hardness, which is about two times of traditional materials. When the sintering temperature arrives at 1 000 ℃ the relative density of bulk nanocrystals can reach 97.86 percent. In this paper, the variation tendency of porosity, phase and particles size of bulk along with the changing of sintering temperature have been studied.