Enlarging heat-treatment processing windows of Fe-Si-B-P-Cu-M nanocrystalline alloys by doping transition metal elements
Enlarging heat-treatment processing windows of Fe-Si-B-P-Cu-M nanocrystalline alloys by doping transition metal elements
复制标题
通过掺杂过渡金属元素扩大Fe-Si-B-P-Cu-M纳米晶合金的热处理加工窗口
DOI：
10.1016/j.jallcom.2020.158420
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发表时间：
2021
影响因子：
6.2
通讯作者：
Pan Deng
中科院分区：
文献类型：
--
作者：
Chang Chuntao;Xiang Zheng;Zhao Chengliang;Wang Anding;Song Ruirui;Pan Deng
系统地研究了Fe83-xSi4B10P2Cu1Mx(Me=0.5V，Cr，Nb，Mo，Ta和W；x=0.02At%)纳米晶合金的晶化行为、热处理条件对软磁性能和组织演变的影响。我们发现，这些过渡金属可以扩大热处理工艺窗口，有效地改善软磁性能。对比研究结果表明，Ta和Nb是稳定和细化纳米晶组织的最佳元素。在最佳热处理条件下，合金化效应的大小顺序为：Ta=Nb&Gt；Mo=W&Gt；V&Gt；Cr，这与过渡元素与其他成分元素的负混合热焓和原子尺寸差有关。少量的Nb和Ta掺杂合金(1%)可以在大窗口中进行热处理，温度范围为70℃，时间范围为60℃，这是行业容易接受的。在743K，60min的温度下，样品获得了高的软磁性能，其Bs值为1.73T，Hc值为8.4A/m，μe值为21T×103.这些高性能合金有望成为大规模生产的候选材料，过渡金属合金化的效果可以为未来高性能合金的发展提供很好的参考。
The crystallization behavior, heat-treatment condition dependences of soft-magnetic properties and microstructural evolution in Fe83-xSi4B10P2Cu1Mx(M = V, Cr, Nb, Mo, Ta and W;x= 0–2 at%) nanocrystalline alloys were systematically investigated. We found that these transition metals can enlarge the heat-treatment processing window and effectively improve the soft-magnetic properties. According to the results of comparative studies, Ta and Nb are the optimal elements in stabilizing and refining the nanocrystalline microstructure. The order of the alloying effect on the optimal heat-treatment conditions is: Ta=Nb>Mo=W>V>Cr, which can be correlated to the negative mixing enthalpy and atomic size difference between transition element and other component elements. The minor Nb and Ta doped alloys (1 at%) can be annealed in a large window with a temperature range of 70 K and a time range of 60 min, which are readily accepted for the industry. Superior soft-magnetic properties containing highBsof 1.73 T,Hcof 8.4 A/m andμeof 21 × 103were obtained in the sample annealed at 743 K in 60 min. These high-performance alloys should be promising candidates for the mass production and the effects of transition metal alloying can be good references for the future development of highBsalloys.