The dependence of composition varied,especially C,Si,Cr,Cu and Co in four amorphous alloy systems Fe_(80-x)Cr_xSi_5B_(15).Fe_(80-x)Cr_xC_5B_(15).Fe_(80-x)Cu_xSi_5B_(15)and (Fe_(1-x)Co_x)_(82)Cu_(0.4)Si_(4.4)B_(13.2)up...The dependence of composition varied,especially C,Si,Cr,Cu and Co in four amorphous alloy systems Fe_(80-x)Cr_xSi_5B_(15).Fe_(80-x)Cr_xC_5B_(15).Fe_(80-x)Cu_xSi_5B_(15)and (Fe_(1-x)Co_x)_(82)Cu_(0.4)Si_(4.4)B_(13.2)upon their saturation magnetostriction at room temperature has been studied.It was observed that the saturation magnetostriction of the alloys may be re- markably improved by small addition of Cu and Co.the peak value being up to 70×10^(-6)as x=0.02 in alloys(Fe_(1-x)Co_x)_(82)Cu_(0.4)Si_(4.4)B_(13.2).展开更多
The microstructural changes of Fe83Si4B13 amorphous mother alloy during the heating process were investigated by Laser Scanning Confocal Microscopy （LSCM） ,and the phase transformation was determined by the Thermo-C...The microstructural changes of Fe83Si4B13 amorphous mother alloy during the heating process were investigated by Laser Scanning Confocal Microscopy （LSCM） ,and the phase transformation was determined by the Thermo-Calc calculations. The differences in the melting points measured by Differential Scanning Calorimetry （DSC） and LSCM, and those obtained by Thermo-Calc calculations were also discussed. It is found that the melting points measured by DSC and LSCM are relatively similar, whereas the onset and end of the melting temperatures calculated by Thermo-Calc software are higher than those measured by DSC and observed by LSCM.展开更多
The magnetic moment and the magnetostriction decrease slightly with the increase of total Si+B content.A maximum of the Curie temperature appears at about 25 at.-% of Si+B.The magnetic anisotropy is uninfluential by t...The magnetic moment and the magnetostriction decrease slightly with the increase of total Si+B content.A maximum of the Curie temperature appears at about 25 at.-% of Si+B.The magnetic anisotropy is uninfluential by the content of Si+B,but much influnce by the demagnetization effect of streak.A qualitative explanation of the experimental phenomenon seems to be noted by the aid of the electron transition and structure model of amorphous al- loys.展开更多
A metallic crystalline/amorphous （c/a） bulk composite was prepared by the slow cooling method after remelting the amorphous Fe78Si9B13 ribbon. By X-ray diffraction （XRD）, differential scanning calorimetry （DSC） ...A metallic crystalline/amorphous （c/a） bulk composite was prepared by the slow cooling method after remelting the amorphous Fe78Si9B13 ribbon. By X-ray diffraction （XRD）, differential scanning calorimetry （DSC） and scanning electron microscope （SEM）, the composite consists of the primary dendrite α-Ee （without Si） as well as the amorphous matrix. After being anneal at 800 K, the uniform spheroid particles are formed in the c/a composite, which does not form in the amorphous ribbon under the various annealing process. Energy dispersive analysis of X-rays （EDAX）, SEM and XRD were applied to give more detailed information. The formation and evolution of the particle may stimulate the possible application of the Fe-matrix amorphous alloy.展开更多
Non-oriented silicon steel （35W310） and amorphous ribbon （FeT8 Si9B13 amorphous alloy） reactor U-cores are made by welding and dipping paint curing, respectively. Amorphous U-core used to make reactor cut sharply ...Non-oriented silicon steel （35W310） and amorphous ribbon （FeT8 Si9B13 amorphous alloy） reactor U-cores are made by welding and dipping paint curing, respectively. Amorphous U-core used to make reactor cut sharply ed-dy current loss due to high electrical resistivity characteristic, thickness of thin ribbon and insulation of dipping paint. The amorphous alloy has high and constant magnetic permeability, and is more suitable for reactor design power to filter high order harmonic component. Keeping off high magnetostriction district with magnetic flux density of 50-100 mT can weaken influence on inductance of inductor due to elongation of magnetostriction. Amorphous al-loy has a lower temperature rise using the software Infolytica 7.2 simulation.展开更多
文摘The dependence of composition varied,especially C,Si,Cr,Cu and Co in four amorphous alloy systems Fe_(80-x)Cr_xSi_5B_(15).Fe_(80-x)Cr_xC_5B_(15).Fe_(80-x)Cu_xSi_5B_(15)and (Fe_(1-x)Co_x)_(82)Cu_(0.4)Si_(4.4)B_(13.2)upon their saturation magnetostriction at room temperature has been studied.It was observed that the saturation magnetostriction of the alloys may be re- markably improved by small addition of Cu and Co.the peak value being up to 70×10^(-6)as x=0.02 in alloys(Fe_(1-x)Co_x)_(82)Cu_(0.4)Si_(4.4)B_(13.2).
文摘The microstructural changes of Fe83Si4B13 amorphous mother alloy during the heating process were investigated by Laser Scanning Confocal Microscopy （LSCM） ,and the phase transformation was determined by the Thermo-Calc calculations. The differences in the melting points measured by Differential Scanning Calorimetry （DSC） and LSCM, and those obtained by Thermo-Calc calculations were also discussed. It is found that the melting points measured by DSC and LSCM are relatively similar, whereas the onset and end of the melting temperatures calculated by Thermo-Calc software are higher than those measured by DSC and observed by LSCM.
文摘The magnetic moment and the magnetostriction decrease slightly with the increase of total Si+B content.A maximum of the Curie temperature appears at about 25 at.-% of Si+B.The magnetic anisotropy is uninfluential by the content of Si+B,but much influnce by the demagnetization effect of streak.A qualitative explanation of the experimental phenomenon seems to be noted by the aid of the electron transition and structure model of amorphous al- loys.
基金the National Natural Science Foundation of China(No. 50871061 and 50471052)the Shandong Science and Research Foundation (No. Y2005F02)+1 种基金the Project for New Century Talent of Ministry of Education (No. NCET-06-584)Alexander von Humboldt Foundation
文摘A metallic crystalline/amorphous （c/a） bulk composite was prepared by the slow cooling method after remelting the amorphous Fe78Si9B13 ribbon. By X-ray diffraction （XRD）, differential scanning calorimetry （DSC） and scanning electron microscope （SEM）, the composite consists of the primary dendrite α-Ee （without Si） as well as the amorphous matrix. After being anneal at 800 K, the uniform spheroid particles are formed in the c/a composite, which does not form in the amorphous ribbon under the various annealing process. Energy dispersive analysis of X-rays （EDAX）, SEM and XRD were applied to give more detailed information. The formation and evolution of the particle may stimulate the possible application of the Fe-matrix amorphous alloy.
基金Item Sponsored by National High-Tech Research and Development Program (863 Program) of China (2009AA03Z214)
文摘Non-oriented silicon steel （35W310） and amorphous ribbon （FeT8 Si9B13 amorphous alloy） reactor U-cores are made by welding and dipping paint curing, respectively. Amorphous U-core used to make reactor cut sharply ed-dy current loss due to high electrical resistivity characteristic, thickness of thin ribbon and insulation of dipping paint. The amorphous alloy has high and constant magnetic permeability, and is more suitable for reactor design power to filter high order harmonic component. Keeping off high magnetostriction district with magnetic flux density of 50-100 mT can weaken influence on inductance of inductor due to elongation of magnetostriction. Amorphous al-loy has a lower temperature rise using the software Infolytica 7.2 simulation.
