论文摘要
High silicon content Al-Si composites with a composition of Al-40 wt% Si were fabricated via a highenergy ball milling method. The microstructure evolution of Al-40 wt% Si milled powders and sintered composites has been thoroughly studied by scanning electron microscopy, X-ray diffraction, energydispersive spectrometry and high-resolution transmission electron microscopy. The mechanism of ball milling Al-40 wt% Si powders has been disclosed in detail: fracture mechanism dominating in the early stages, followed by the agglomeration mechanism, finally reaching the balance between the fragments and the agglomerates. It has been found that the average particle sizes of mixed Al-Si powders can be refined to the nanoscale, and the crystallite sizes of Al and Si have been reduced to 10nm and 62nm upon milling for 2h–50h, respectively. The finally formed Al-Si interfaces after ball milling for 50h are wellcohesive. A dense and homogenous Al-40 wt% Si composite have been achieved by solid-state sintering at550?C. The results thus provide an effective support for producing bulk nanostructured Al-Si composites.
论文目录
文章来源
类型: 期刊论文
作者: Yuanyuan Chen,Zhangping Hu,Yifei Xu,Jiangyong Wang,Peter Schützendübe,Yuan Huang,Yongchang Liu,Zumin Wang
来源: Journal of Materials Science & Technology 2019年04期
年度: 2019
分类: 工程科技Ⅰ辑
专业: 材料科学
单位: School of Materials Science and Engineering,Tianjin University,Department of Physics,Shantou University,Max Planck Institute for Intelligent Systems
基金: financially supported by the National Natural Science Foundation of China (No.51571148),the National Key Research and Development Program of China (No.2017YFE0302600 and No.2017YFB0701801),the Thousand Talents Program for Distinguished Young Scholars of China
分类号: TB33
页码: 512-519
总页数: 8
文件大小: 2508K
下载量: 12
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