In this paper, a durability study is presented to enhance the mechanical properties of an Fe-Si-Al powderbased magnetic core, through the addition of graphite. The compressive properties of Fe-Si-Al-graphite powder mixtures are explored using discrete element method (DEM), and a powder compaction experiment is performed under identical conditions to verify the reliability of the DEM analysis. Important parameters for powder compaction of Fe-Si-Algraphite powder mixtures are identified. The compressibility of the powders is observed to increase as the amount of graphite mixture increases and as the size of the graphite powders decreases. In addition, the compaction properties of the Fe-Si-Al-graphite powder mixtures are further explored by analyzing the transmissibility of stress between the top and bottom punches as well as the distribution of the compressive force. The application of graphite powders is confirmed to result in improved stress transmission and compressive force distribution, by 24% and 51%, respectively.

Abstract
1. 서 론
2. 실험 방법
3. 결과 및 토론
    3.1 Fe-Si-Al-Graphite 혼합 비율
    3.2 Fe-Si-Al-Graphite 크기 비율
    3.3 응력 전달 및 압축력 분산
4. 결 론
References

• 정준혁(한밭대학교 기계공학과) | Jun Hyeok Jeong (Department of Mechanical Engineering, Hanbat National University)
• 최진일(한밭대학교 기계공학과) | Jinnil Choi (Department of Mechanical Engineering, Hanbat National University) Corresponding Author