多孔泡沫金属及其磁导率的研究

研究了多孔泡沫金属的磁导率,建立了电沉积金属磁导率的计算模型。利用石蜡熔融的方法,得到了电沉积所得的多孔泡沫金属的孔隙率;利用振动样品磁强计对结构参数相同、磁导率不同的三种多孔泡沫金属进行了测试,得到了多孔泡沫金属及电沉积金属的相对磁导率,根据等效磁阻的原理,对电沉积金属相对磁导率进行了仿真计算,计算结果与实验相近;结果表明,建立的模型可以用来计算电沉积金属的相对磁导率;多孔泡沫金属的磁导率随着电沉积金属磁导率的增加而增加,随着孔隙率的增加而减小,为研究多孔泡沫金属的磁性能提供了理论和实验依据。

Investigation on Magnetic Permeability of Porous Foam Metals

The relative magnetic permeability of porous foam metal is investigated and the model of computation of electrodeposited metals is built up in this paper.First,the porosity of porous foam metal is tested and obtained by using the fusible paraffin;the magnetic permeability of three kinds of porous foam metal with the same structure parameters and different relative permeability are tested by vibrating sample magnetometer（VSM）.The initial relative permeability of the electrodeposited metals is simulated based on the equivalent reluctivity,and the calculated results are close to the testing results.The results show that the calculation model can be used to calculate the relative permeability of electrodeposited metals,at the same time,according to the calculation,the relative permeability of porous foam metals will increase with the increased relative permeability of electrodeposited metals and decrease with the increased porosity,which provide the theorical and experimental proof for the research on magnetic characteristics of porous foam metals.