한국분말야금학회지 Vol. 26 No. 2 (p.107-111)

기계적 합금화 투입에너지 계산에 의한 이원합금계의 상변태 시간 예측

Prediction the Phase Transformation Time of Binary Alloy System by calculating the Input Energy of Mechanical Alloying
키워드 :
High energy milling,Mechanical Alloying,Al-Ni alloy,Phase transformation,Energy Analysis

목차

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

초록

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.