The activation energy to create a phase transformation or for the reaction to move to the next stage in the milling process can be calculated from the slop of the DSC plot, obtained at the various heating rates for mechanically activated Al-Ni alloy systems by using Kissinger's equation. The mechanically activated material has been called “the driven material” as it creates new phases or intermetallic compounds of AlNi in Al-Ni alloy systems. The reaction time for phase transformation by milling can be calculated using the activation energy obtained from the above mentioned method and from the real required energy. The real required energy (activation energy) could be calculated by subtracting the loss energy from the total input energy (calculated input energy from electric motor). The loss energy and real required energy divided by the reaction time are considered the “metabolic energy” and “the effective input energy”, respectively. The milling time for phase transformation at other Al-Co alloy systems from the calculated data of Al-Ni systems can be predicted accordingly.

Abstract
 1. 서 론
 2. 실험방법
 3. 실험결과 및 고찰
 4. 결 론
 References

• 박동규(경상대학교 링크사업단) | Dong-Kyu Park (LINC, Gyeongsang National University)
• 안인섭(경상대학교 나노·신소재공학부) | In-Shup Ahn (School of Nano and Advanced Materials Science & Engineering, Gyeongsang National University) Corresponding Author