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Nanocarbon in the Structure of a Hypereutectic Aluminum-Matrix Composite
Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2020-08-25 , DOI: 10.1134/s1027451020040023
A. S. Aronin , I. M. Aristova , G. E. Abrosimova , V. V. Vasenev , V. N. Mironenko

The peculiarities of the fine structure of Al–Si–Ni aluminum-matrix composite with a low thermal coefficient of linear expansion, mechanically activated with the addition of nanoscale reduced graphene oxide (RGO), is investigated. The structure is studied by X-ray diffraction analysis, scanning, transmission and high-resolution transmission electron microscopy. The presence of quasi-graphene layers on the surface of aluminum and silicon particles is detected and it is shown that this shell protects them from clumping upon mechanical alloying, which significantly increases the manufacturability of the process of mechanical activation and subsequent compaction. Thus, it is possible to obtain composite materials with a homogeneous structure and higher physical properties (the use of RGO instead of electrode graphite reduces the thermal coefficient of linear expansion (TCLE) of the composite by 10%).

中文翻译:

过共晶铝基复合材料结构中的纳米碳

研究了低线性膨胀热系数的Al-Si-Ni铝基复合材料的精细结构的特性,该结构通过添加纳米级氧化石墨烯(RGO)机械活化。通过X射线衍射分析,扫描,透射和高分辨率透射电子显微镜研究了该结构。检测到铝和硅颗粒表面上存在准石墨烯层,并且表明该壳可防止它们在机械合金化时结块,从而显着提高了机械活化和后续压制过程的可制造性。从而,
更新日期:2020-08-25
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