3 years ago

Processing and Properties of CNTs/ADC12 Nanocomposite

Zhifan Wei, Hong Yan, Zhixiang Huang, Qingjie Wu, Yongcheng Zou

Abstract

Carbon nanotubes (CNTs)-reinforced ADC12 nanocomposite was successfully fabricated via casting. The CNTs-Al master alloy was prepared by hot extrusion, and the CNTs were dispersed into the matrix by a high-intensity ultrasonic treatment during the casting process to yield 0.5, 1.0, 1.5 wt.% of the CNTs/ADC12 composite. The key step in arriving at homogeneous distribution of CNTs was preparation of the CNTs-Al master alloy and the introduction of a high-intensity ultrasonic treatment method. The cavitation bubbles that adhered to the aggregated CNTs closed rapidly and released large amounts of energy, which had an impact via the cavitation effect, which made the aggregated CNTs dissociate and disperse homogeneously into the melt. Under the conditions of ultrasonic power of 2.1 kW and ultrasonic time of 10 min, the mean diameter of α-Al was 53.2 μm, which was 58.9% lower than that of the matrix. The microhardness and the ultimate tensile strength (UTS) of nanocomposite with 1.0 wt.% CNTs addition increased by 29.3 and 27%, respectively, as compared with the matrix. CNTs can be dispersed in the matrix homogeneously. It was observed by scanning electron microscope (SEM) that CNTs as a load-bearing element were embedded in the matrix independently, enhancing the mechanical properties. This suggested that the improvement of mechanical properties could be attributed to the size and degree of CNTs clustering, the load transfer from the matrix to the CNTs and the grain refinement of the nanocomposite.

Publisher URL: https://link.springer.com/article/10.1007/s11665-018-3752-5

DOI: 10.1007/s11665-018-3752-5

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.