D.C. magnetic properties of metallic glasses after flash annealing
D.C. magnetic properties of metallic glasses after flash annealing
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DOI：
10.1109/tmag.1984.1063448
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发表时间：
1984-09
影响因子：
2.1
通讯作者：
M. Gibbs;D. Lee;J. Evetts
中科院分区：
文献类型：
--
作者：
M. Gibbs;D. Lee;J. Evetts
在这项研究中，闪光退火涉及通过形状良好的直流电。已知持续时间的电流脉冲穿过金属玻璃直条。快速升温（∼ 5000 K s-1）、高最终温度（\sim500-600\deg C）、短脉冲持续时间（112 ms）和脉冲结束时的快速冷却（∼500 K s-1）相结合，实现了传统炉处理中无法获得的热循环。这项研究表明，与炉处理相比，闪速退火后可以获得更低的矫顽场 H c 值。单轴各向异性 K u 也可通过闪光退火而降低。从应力消除、蠕变增强松弛和可达到的总松弛程度方面对结果进行了讨论。概述了一种热处理金属玻璃芯的新方法，作为这项工作的延伸。
In this study, flash annealing involves passing a well shaped d.c. current pulse of known duration, through a straight strip of metallic glass. The rapid temperature rise (∼ 5000 K s-1), the high final temperature ( \sim500-600\deg C), the short pulse duration (112 ms), and the rapid cooling at the end of the pulse (∼500 K s-1) combine to achieve a thermal cycle unobtainable in a conventional furnace treatment. This study shows that a lower value of coercive field, H c , can be achieved after flash annealing than is possible in a furnace treatment. The uniaxial anisotropy, K u , is also reduced by flash annealing. A discussion of the results is given in terms of stress relief, creep enhanced relaxation and the total degree of relaxation attainable. A novel method of heat treating metallic glass cores is outlined, as an extension of this work.