The strengthening effect of fullerenes in aluminum matrix composites was investigated. The composites are produced using a two-step ball-milling technique combined with a hot rolling process. First, fullerene aggregates, where fullerene molecules initially come together to form giant particles (∼200 μm in diameter) via van der Waals bonding, are shattered into smaller particles (∼1 μm in diameter) by planetary milling. Second, primarily ball-milled fullerenes are dispersed in aluminum powder via attrition milling. Finally, aluminum/fullerene composite powder is consolidated by hot-rolling at 480 °C. For the composite sheet, grain refinement strengthening and dispersion hardening by fullerenes are accomplished at the same time, thereby exhibiting HV ∼222 of Vickers hardness (e.g., ∼740 MPa of yield strength) with only 2% (volume fraction) of fullerenes.
|Journal||Transactions of Nonferrous Metals Society of China (English Edition)|
|Issue number||SUPPL. 1|
|Publication status||Published - 2014|
Bibliographical noteFunding Information:
This work was supported in part by the New Faculty Research Program 2012 of Kookmin University in Korea. Hyunjoo Choi also acknowledges the support from the Priority Research Centers Program (2012-0006680) and the Korea-Belarus Joint Research Program (2012-057348) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Geotechnical Engineering and Engineering Geology
- Metals and Alloys
- Materials Chemistry