Abstract

The choice of the composition of the components of a composite material that determines its prospects and demand has been substantiated. Liquid-phase combination is used to fabricate billets of an aluminum-matrix composite material of a new composition. The technological problems of introducing discrete Al₂O₃ nanofibers into an aluminum matrix are solved. A copper powder is used to overcome surface tension forces and to ensure a uniform reinforcing component distribution. When the components of the composite material are prepared, the reinforcing phase consisting of a transport powder and nanofibers is ground and the resulting conglomerate is introduced into a melt to form a composite material. The hardness of the reinforced specimens is higher than the hardness of the matrix, and sufficient uniformity of the hardness distribution over the cross section demonstrates the uniformity of introduced component distribution. An analysis of the fracture of specimens demonstrates a clear predominance of plastic deformation for the initial matrix alloy and an embrittlement effect in the case of reinforcement. Structural studies on a macrolevel show the signs characteristic of brittle fracture, and scanning electron microscopy (Tescan Vega IILMH microscope) studies demonstrate signs of ductile fracture. The fabrication of high-quality specimens and the results of studying the structure and properties confirm the efficiency of the technology developed for the introduction of fillers.

中文翻译：

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分立的Al 2 O 3纤维生产理想的铝基复合材料的技术

摘要

已经证实了决定其前景和需求的复合材料成分组成的选择。液相组合用于制造新组成的铝基复合材料坯料。引入离散Al ₂ O ₃的技术问题解决了将纳米纤维转变成铝基质的问题。铜粉用于克服表面张力并确保均匀的增强组分分布。当制备复合材料的组分时，将由输送粉末和纳米纤维组成的增强相研磨，并将所得的团块引入熔体中以形成复合材料。增强样品的硬度高于基体的硬度，并且横截面上的硬度分布足够均匀，表明引入的成分分布均匀。对样品断裂的分析表明，初始基体合金明显具有塑性变形优势，而在增强情况下具有脆化效应。宏观上的结构研究表明了脆性断裂的迹象，而扫描电子显微镜（Tescan Vega IILMH显微镜）研究表明了韧性断裂的迹象。高质量样品的制造以及对结构和性能的研究结果证实了为引入填料而开发的技术的效率。