The improvement of strength without compromising the conductivity remains a major issue in developing superior aluminium conductors. This could be addressed by dispersion of nano-sized high melting point elements such as tungsten which has limited solid-solubility in the aluminium matrix. The composites fabricated in this study shows 1.3 times improvement in yield strength, and 2 times increase in UTS. The composites also exhibit superior electrical conductivity compared to other aluminium alloys. Solid-state processing technique was adopted for composite fabrication to avoid thermally activated reaction, between matrix and particles. An unexpected result was the observation of mechanical energy induced interface reaction between aluminum and tungsten during the processing which was not expected at the low processing temperatures. This was confirmed by detailed TEM examination that probed the formation and structure of this new phase. These findings open up newer possibilities toward efficient and scalable manufacturing of high conductive composites with improved strength. (C) 2018 Published by Elsevier B.V.

中文翻译：

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电应用纳米钨粒子增强高强度铝复合材料的制造及加工过程中的原位反应研究

在不影响导电性的情况下提高强度仍然是开发优质铝导体的主要问题。这可以通过分散在铝基体中固溶性有限的纳米级高熔点元素（例如钨）来解决。本研究中制造的复合材料的屈服强度提高了 1.3 倍，UTS 提高了 2 倍。与其他铝合金相比，该复合材料还表现出优异的导电性。复合材料制造采用固态加工技术，以避免基体和颗粒之间的热活化反应。一个意想不到的结果是在加工过程中观察到机械能引起的铝和钨之间的界面反应，这在低加工温度下是预料不到的。详细的 TEM 检查证实了这一点，该检查探测了这一新相的形成和结构。这些发现为高效、可扩展地制造强度更高的高导电复合材料开辟了新的可能性。(C) 2018 年 Elsevier BV 出版