|
Vol.41, No.7, 450 ~ 457, 2003
|
| Title |
| Characterization of Nano-Sized Crystallites of Mechanically Alloyed High Silicon Al-Si Alloys |
| 이정일 Lee Jung Il , 김일호 Kim Il Ho , 홍태환 Hong Tae Whan , 어순철 Ur Soon Chul , 양계준 Yang Kea Joon , 석현광 Seok Hyun Gang , 한만갑 Han Man Gap , 최국선 Choi Good Sun , 김준수 Kim Joon Soo |
|
|
|
| Abstract |
| High silicon Al-Si alloys with nanocrystalline structures have been produced by mechanical alloying process. Microstructural changes of the Al-Si alloys were investigated by scanning electron microscopy and the transmission electron microscopy. X-ray diffraction analysis was also made to characterize the lattice constant, crystallite size and misfit strain. It was found that the effective milling time by attrition milling was about 12hours for Al-70 wt％Si alloy system. The Al and Si crystallites were reduced to about 30 nm and 70 nm, respectively, by the mechanical alloying for more than 12hours. The misfit strains increased with milling time UD to 240 hours, and saturated to 5.73×10^(-3) for Al and Si crystallites, respectively. |
|
|
| Key Words |
| High silicon Al-Si alloy, XRD, Crystallite size, Misfit strain |
|
|
 |
|
