Effect of Inclusions on Coercive Force of Iron
Effect of Inclusions on Coercive Force of Iron
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夹杂物对铁矫顽力的影响
DOI：
10.1103/physrev.79.979
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发表时间：
1950
期刊：
影响因子：
--
通讯作者：
C. Wert
中科院分区：
文献类型：
--
作者：
L. Dijkstra;C. Wert
本文提出了随机分布的非磁性夹杂物对铁矫顽力贡献的理论。两个贡献的影响进行检查：（1）表面张力的效果，（2）内部磁极的效果。结果表明，矫顽力既取决于夹杂物的总体积分数，也取决于夹杂物的分散状态。对于给定的合金成分，对于比畴壁厚度δ大得多和小得多的颗粒，对矫顽力的净贡献很小。最大的影响发生在直径约等于δ的颗粒上。测量已经使用分散在铁的Fe 3 C的形状的球体，其直径可以在所需的范围内变化。发现对矫顽力的最大影响发生在尺寸约为1200埃的颗粒上，表明δ值约为该量级。对于这个值的d的矫顽力的测量值被发现同意以及与计算值。
A theory is developed for the contribution to the coercive force of iron of randomly distributed non-magnetic inclusions. Two contributing effects are examined:(1) the surface tension effect, and (2) the effect of internal magnetic poles. It is found that the coercive force depends both on the total volume fraction of inclusions and the state of dispersion. For a given composition of alloy, for particles both much larger and much smaller than the thickness of the domain wall, δ, the net contribution to the coercive force is small. The largest effect occurs for particles whose diameter is about equal to δ. Measurements have been made using a dispersion in iron of Fe 3 C in the shape of spheres, the diameters of which could be varied over the desired range. The maximum effect on coercive force is found to occur for particles of size about 1200 angstroms, indicating a value for δ of about this magnitude. For this value of d the measured value of the coercive force is found to agree well with the calculated value.