Preparation and Characterization of Copper-Nickel Bulk Nanocrystals
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2014年第3期
论文作者：吴小强 TANG Yongjian WANG Lan AN Xuguang YI Zao 孙卫国
文章页码：606 - 611
摘 要：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.
吴小强1,2，TANG Yongjian2，WANG Lan1，AN Xuguang1，YI Zao2，孙卫国1
1. Department of Materials Science and Engineering, Xihua University2. Research Center of Laser Fusion,China Academy of Engineering Physics
摘 要：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.
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