FeSiAl纳米晶片状微粉的结构及磁性能研究  

Structure and magnetic characteristic of FeSiAl nanocrystalline flaky powders

作　　者：周廷栋[1] 邓龙江[1] 梁迪飞[1] 余志海[1] 

机构地区：[1]电子科技大学微电子与固体电子学院

出　　处：《金属热处理》2008年第3期36-39,共4页Heat Treatment of Metals

基　　金：四川省青年科技基金(04ZQ026-008)

摘　　要：用熔融快淬法制备FeSiAl合金薄带,分别在600℃和650℃进行了1 h退火处理,然后将薄带分别球磨30、50、70、90 h,得到薄片状微粉。用扫描电镜分析了微粉的表面形貌,X射线衍射分析了微粉晶体结构的有序度、晶格常数、晶粒尺寸;用振动样品磁强计测量了微粉球磨后的比饱和磁化强度。结果表明,热处理使DO3超点阵有序度增加,球磨可增大微粉的长径比,铝在球磨中会析出,球磨70 h时晶粒尺寸最小,比饱和磁化强度最大。The FeSiAl alloy ribbons prepared by melt-quench were annealed for 1 h at 600℃ and 650℃ respectively. The flaky powders were obtained by milling annealed ribbons for 30,50,70 and 90 h respectively. The powder＇s profiles were studied by SEM. Ordering degree,lattice constant and grain size of flaky powders were analyzed by XRD. The specific saturation magnetization was measured by vibrating samples magnetometer （VSM）. The results show that the ordering degree of DO3 superlattice structure increases after heat treating, and the aspect ratios of flaky powers increase with increasing the milling time, and Al precipitates from alloy during milling. The minimum grain size and the largest specific saturation magnetization were obtained for 70h of milling.

关 键 词：FeSiAl片状微粉 超点阵 有序度 比饱和磁化强度 

分 类 号：TM274[一般工业技术—材料科学与工程]