Fe_(86)Zr_7B_6Cu_1非晶条带在热等静压中的纳米晶化及其软磁性能

Nanocrystallization and soft magnetic properties of amorphous Fe_(86)Zr_7B_6Cu_1 ribbons annealed by hot isothermal pressing

为了细化纳米晶软磁材料中纳米颗粒的晶粒尺寸和提高其体积分数,对热等静压(HIP)晶化处理非晶Fe86Zr7B6Cu1条带进行研究。利用DSC对非晶合金进行热分析,利用X线衍射(XRD)对纳米晶条带进行相结构、晶粒尺寸和体积分数分析和测算,采用振动样品磁强计(VSM)测定试样的饱和磁感应强度和矫顽力。研究结果表明:当压力由常压增大到150MPa时,α-Fe纳米颗粒的晶粒尺寸由13.2nm降至7.3nm;当压力由常压增大到100MPa时,α-Fe纳米颗粒的体积分数由64.8%上升到72.2%,而后当压力进一步增大到150MPa,体积分数则降至70.2%;当压力由常压增大到150MPa时,试样的矫顽力由15.8A/m减小到1.8A/m;经100MPa热等静压处理后,试样的饱和磁感应强度高达1.65T,矫顽力仅为2.4A/m。

In order to decrease the grain size of nanocrystallites and increase its volume fraction in nanocrystalline soft magnetic alloys, hot isothermal pressing （HIP） was used to anneal amorphous Fe86Zr7B6Cu1 ribbons. Thermal analysis was performed by differential scanning calorimetry （DSC）. Phase structures, grain sizes and volume fractions were measured by X-ray diffraction （XRD）. Saturation magnetization and coercive force were tested with a vibrating sample magnetometer （VSM）. The results show that the grain size of α-Fe nanocrystallites decreases from 13.2nm to 7.3nm with increasing pressure from ambient pressure to 150 MPa. The volume fraction of α-Fe nanocrystallites increases from 64.8% to 72.2% when enhancing pressure from ambient pressure to 100 MPa, but the volume fraction of α-Fe nanocrystallites decreases to 70.2% after enhancing pressure to 150 MPa. The coercive force decreases from 15.8 A/m to 1.8 A/m with increasing pressure from ambient pressure to 150 MPa. The sample annealed by HIP under the pressure of 100 MPa exhibits a high saturation magnetization of 1.65 T and a low coercive force of 2.4 A/re.