用于高温的低磁致伸缩FeCo基纳米晶软磁合金的研究

项目名称： 用于高温的低磁致伸缩FeCo基纳米晶软磁合金的研究

项目编号： No.51271130

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 王治

作者单位： 天津大学

项目金额： 80万元

中文摘要： FeCo基双相纳米晶合金具有高饱和磁感及较高的居里温度，通过适当的纳米晶化退火我们发现在非晶相居里温度以上较高温度范围内仍保持一定的磁性，但FeCo基纳米晶合金的磁导率较低，限制其在航空航天领域中高灵敏度仪器及仪表中的应用，因而成为目前FeCo基高温纳米软磁合金进一步发展的一个重要瓶颈。近期我们对FeCo基双相纳米晶合金的研究表明，晶体相较大的磁致伸缩是导致较低磁导率的主要原因。因此本项研究拟通过各种途径降低该类合金的磁致伸缩，以获得高磁导率并适于高温应用为主要目标。主要研究（1）FeCo基双相纳米晶合金磁致伸缩的形成机理及其影响因素；（2）合金元素对晶体相及非晶相磁致伸缩的影响规律；（3）低磁致伸缩高温纳米软磁合金的形成条件。通过以上研究，初步探明具有高居里温度、低磁致伸缩及高磁导率的双相纳米晶合金形成的基本规律，研究出低磁致伸缩、在高温下具有高磁导率的新型高温纳米软磁材料。

中文关键词： FeCo基双相纳米晶合金；磁致伸缩；居里温度；磁导率；高温磁性

英文摘要： As an high-temperature soft magnetic material application, FeCo-based two-phase nanocrystalline alloys with high saturation induction and high Curie temperature have encountered an important bottleneck for further developing - lower permeability, which confiined their applicaions in high-sensitivity apparatus & instrument of Aeronautics and Astronautics fields. Our recent investigation showed that the larger magnetostriction of this kind of alloys is main reason for the lower permeability. So we plan to study the formation mechanism of high-temperature soft magnetic alloys with lower magetostriction, in order to obtain the higher permeability in high temperatures. The main research contents deal with (1) exploring the formation mechanism of magetostriction for FeCo-based two-phase nanocrystalline alloys; (2) Influence of alloying element on magetostriction of crystalline phase and amorphous phase; (3) Formation conditions of high-tempeature soft magnetic alloys with lower magetostriction. By above investigations, we expect to ascertain the formation conditions of two-phase nanocrystalline alloys with high Curie temperature, low magetostriction and high peameability, at the some time, to develop new high-temperature soft magnetic materials with low magetostriction and high permeability at high temperatures.

英文关键词： FeCo-based two phase nanocrystalline alloys；magnetostriction；Curie temperature；permeability；high temperature magnetic properties