纳米晶Fe_(74.7-x)Cu_1Nb_xV_(1.8)Si_(13.5)B_9合金的磁性

金属学报

1995, Vol. 31

Issue (17): 212-219

论文

本期目录 | 过刊浏览

纳米晶Fe_(74.7-x)Cu_1Nb_xV_(1.8)Si_(13.5)B_9合金的磁性

张延忠;年素珍;金慧娟;许桂琴;杨燮龙;李香箐

上海钢铁研究所;华东师范大学

MAGNETIC PROPERTIES OF NANOCRYSTALLINE Fe_(74.7-X)Cu_1Nb_xV_(1.8)Si_(13.5)B_9 ALLOYS

ZHANG Yanzhong; (Shanghai Iron and Steel Research Institute; ShanHhai 200940) NIAN Suzhen; JIN Huijuan; XU Guiqin (Shanghai Iron and STeel Research Instituie; Shanghai 200940 ); YANG XielonK; LI Xiangqing(East China Normal University; Shanghai 200062)

引用本文:

张延忠;年素珍;金慧娟;许桂琴;杨燮龙;李香箐. 纳米晶Fe_(74.7-x)Cu_1Nb_xV_(1.8)Si_(13.5)B_9合金的磁性[J]. 金属学报, 1995, 31(17): 212-219.
, , , , , . MAGNETIC PROPERTIES OF NANOCRYSTALLINE Fe_(74.7-X)Cu_1Nb_xV_(1.8)Si_(13.5)B_9 ALLOYS[J]. Acta Metall Sin, 1995, 31(17): 212-219.

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摘要: 本文报道Ｆｅ７４．７－ｘＣｕ１ＮｂｘＶ１．８Ｓｉ１３．５Ｂ９（ｘ＝１，１．５，２）纳米晶软磁合金的综合磁性。ｘ＝２的合金的高频铁损水平为：ｐ３／１００ｋ＝４６８ｋｗ／ｍ３：Ｐ２／２００ｋ＝７０６ｋＷ／ｍ３；Ｐ２／５００Ｋ＝３６２０ｋｗ／ｍ３和Ｐ０．５／１０００ｋ＝８１０ｋｗ／ｍ３优于Ｆｅ－Ｃｕ－Ｎｂ－Ｓｉ－Ｂ类纳米晶合金的水平所考察的三种合金铁损水平都大大优于功率优良的Ｍｎ－Ｚｎ铁氧体Ｈ７Ｃ４考察了起始磁化率的温度关系，观察到原始非晶样品出现两个尖锐的Ｈｏｐｋｉｎｓｏｎ峰，与此不同的是，在具有最佳磁性的样品中只出现第二Ｈｏｐｋｉｎｓｏｎ峰，用Ｔｈｏｍａｓ理论解释了这一现象。观察到高温下纳米α－Ｆｅ（Ｓｉ）晶粒系统的超顺磁行为，起始磁化率的温度关系符合Ｃｕｒｌｅ－Ｗｅｉｓｓ定律。

关键词 ：纳米晶合金, 相对有效磁导率, 相对起始磁化率, 铁损, 超顺磁性

Abstract：The synthetical soft magnetic properties are reported for newly-developed nanocrystalline Fe74.7-xCu1NbxV1.8Si13.5B9( x=1, 1 .5. 2.0) alloys. The levels of high-frequency core loss of the alloy with x=2.0 are as follows: P3/100k=468 kW /m3, P2/200 k=706kW/m3; P2/500k=3620kW/m3 and P0.5/1000k=810 kW/m3, they are lower than those of Fe-Cu-Nb-Si-B nanocrystalline alloys. The high-frequency core losses of three new alloys are much lower than those of the superior power Mn-Zn ferrite H7c4 The temperature dependences of initial susceptibility of new alloy have been investigated. It has been observed that two sharp Hopkinson peaks appear in as-quenched samples during heating. whereas the second Hopkinson peak merely appears in the samples with optimum maqnetic properties.This phenomenon is interpreted by Thomas theory. It has been observed that the assembly of α-Fe(Si) grains with nanometre size exhibits superparamagnetic behaviour and Curie-Weiss type of temperature dependence of initial susceptibity at elevated temperature.

Key words： nanocrystalline alloy relative effective permeability relative initial susceptibility core loss superparamagnetism

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