Scalable manufacturing of immiscible Al-Bi alloy by self-assembled nanoparticles

作者：Cao, Chezheng; Liu, Weiqing; Liu, Zhiwei; Xu, Jiaquan; Hwang, Injoo; De Rosa, Igor; Li, Xiaochun^*

来源：Materials and Design, 2018, 146: 163-171.

DOI：10.1016/j.matdes.2018.03.008

• Al-Bi immiscible alloy
• Phase control
• Self-assembled nanoparticles
• Scalable manufacturing

Immiscible Al-Bi alloy, with a miscibility gap in the liquid state is not only scientifically important, but also it can offer outstanding self-lubricating properties. However, it is still difficult to control the distribution and size of minority Bi phase during cooling and solidification. Here we show that by applying a scalable molten salt assisted incorporation process, TiC nanoparticles can be incorporated in Al matrix to produce Al-TiC master nanocomposites, which can be readily used to process Al-Bi immiscible alloy and restrict the size of minority Bi phase. TiC nanoparticles can be self-assembled on the Al-Bi interface and restrict Bi phase size substantially. In addition, submicron minority Bi phase can be achieved by combining the addition of nanoparticles with high cooling rates. Mechanical properties of Al-Bi immiscible alloys can be further enhanced by the addition of Cu element and cold rolling.

• 出版日期2018-5-15
• 单位哈尔滨工业大学