Characteristics of power loss in soft magnetic composites a key for designing the best values of technological parameters
Characteristics of power loss in soft magnetic composites a key for designing the best values of technological parameters
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DOI：
10.1016/j.jallcom.2013.07.084
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发表时间：
2013-12
影响因子：
6.2
通讯作者：
B. Slusarek;B. Jankowski;K. Sokalski;J. Szczygłowski
中科院分区：
文献类型：
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作者：
B. Slusarek;B. Jankowski;K. Sokalski;J. Szczygłowski
本文提出了一种新的方法来确定制备软磁复合材料所需的工艺参数，如压制压力和硬化温度。新方法基于软磁复合材料中功率损耗的优化。功率损耗已在Somaloy 500样品中测量，用于宽范围的频率和磁感应。这些样品是在广泛的压实压力和硬化温度下制备的。假设所研究的样品服从标度律，推导出了功率损耗特性。实验数据和标度理论之间的一致性证实了这一假设。此外，给定样品的实验数据已被压缩成一条曲线，该曲线代表了所有频率和磁感应强度值的测量值。缩放将损耗特性从二维表面转换为一维曲线。根据两种方法制备样品：不同压力下恒温和不同温度下恒压。在这两种情况下，功率损耗随着压力的增加和温度的增加而减小。随着压实压力和硬化温度的增加，功率损失分别减少，停止其特定的临界值。高于这些值，功率损耗突然增加。上述临界压力和临界温度是寻求最佳值的解决方案。为了减少参数设置，在压力-温度平面内导出了极限曲线。该曲线构成对应于高损耗和低损耗的参数值之间的分离曲线。
In this paper, we consider a new way to choice values of technological parameters, such as compaction pressure and hardening temperature which are required during preparation of soft magnetic composites. The novel approach based on an optimization of power loss in soft magnetic composites. The power losses have been measured in Somaloy 500 samples for a wide range of frequency and magnetic induction. These samples have been prepared under a wide range of compaction pressures and hardening temperatures. The power loss characteristics have been derived by assuming that investigated samples obeyed the scaling law. Agreement obtained between the experimental data and the scaling theory has confirmed this assumption. Moreover, the experimental data of the given sample have been collapsed to a single curve which represented measurements for all values of frequency and magnetic induction. The scaling transforms the loss characteristics from the two dimensional surfaces to the one dimensional curves. The samples were produced according to two methods: for different pressures with constant temperature and at different temperatures with constant pressure. In both cases the power losses decrease with increasing pressure and with increasing temperature. The reduction of power losses with increasing compaction pressure and hardening temperature respectively, stops for their certain critical values. Above these values, the power losses increase suddenly. The aforementioned, the critical pressure and the critical temperature are sought after solutions for optimal values. In order to reduce the parameters values set, the limit curve has been derived in the pressure–temperature plane. This curve constitutes a separation curve between the parameters values corresponding to high and low losses.