摘要
对Fe_(78)Si_98_(13)非晶进行了低频磁脉冲处理(场强0.01—0.04 T,频率20—40 Hz,作用时间60—300 s),以红外非接触测温仪测量处理过程的试样温升,用M(?)ssbauer谱、透射电镜观察试样的微结构变化.研究表明,在磁脉冲作用下,非晶合金发生了低温纳米晶化(温升△T=7℃),晶化相α-Fe(Si)的晶粒尺寸约10 nm.析出量2.18%—9.43%;所形成的双相纳米合金对应的平均超精细磁场较非晶的原始制备态明显增加.
Amorphous Fe78Si9B13 alloys have been treated by low frequency magnetic pulsing. The temperature rise in the course of the application of pulsed magnetic field was measured by a non- contact infrared thermometer. The microstructure change of amorphous specimens after treatment was observed by MSssbauer spectroscopy and TEM. The results showed that nanocrystallization of amorphous specimens can occur at low temperature (the temperature rise ΔT=7℃. The volume content and grain size of nanocrystalline phase α-Fe(Si) are about 2.18%-9.43% and 10 nm, respectively. Compared with the as-quenched sample, the double-phase nanocrystalline alloy has obvious high mean hyperfine magnetic field.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第3期231-234,共4页
Acta Metallurgica Sinica
基金
国家高技术研究发展计划项目2002AA30260
高等学校博士学科点专项科研基金项目20020145009资助~~
关键词
Fe78Si9B13非晶
低频磁脉冲处理
低温纳米晶化
超精细磁场
Fe78Si9B13 amorphous, low frequency magneto-pulsing, nanocrystallization at low temperature, hyperfine magnetic field