Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 24    No. 1    July 2014

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Mechanical properties of aluminum-based nanocompositereinforced with fullerenes
Kwangmin CHOI1, Jiyeon SEO2, Donghyun BAE2, Hyunjoo CHOI1

1. School of Advanced Materials Engineering, Kookmin University, Seoul 136-702, Korea;
2. School of Advanced Materials Engineering, Yonsei University, Seoul 120-749, Korea

Abstract: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.

 

Key words: aluminum; fullerenes; ball-milling; powder metallurgy; composites

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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