摘要
用熔融快淬法制备了FeCuNbSiB非晶纤维,分别在300℃,400℃,450℃,500℃进行了1h退火处理。用扫描电镜分析了退火前后的纤维表面形貌。用X射线衍射分析了纤维在此温度段的晶化行为,估算其晶粒尺寸约为37nm。用差示扫描量热仪分析了纤维的晶化温度在530℃左右。若退火温度升高到约700℃时则有其它相析出,使软磁性能恶化。随退火温度的升高,纤维的比饱和磁化强度减小,纳米晶相体积分数增大,非晶相减少。对饱和磁化强度的影响占主导地位的是纳米晶相。
The FeCuNbSiB fibers prepared by melt-spinning were annealed for 1 h at 300℃, 400℃, 450℃, 500℃, respectively. By scanning electron microscope （SEM）, the fiber surface morphologies of before and after annealing were analyzed. The nanocrystallization behavior was analyzed by X-ray diffraction （XRD） in this range, and the grain size is about 37 nm. The nanocrystallization temperature is about 530℃ according to differential scanning calorimeter （DSC）. If the annealing temperature is increased to 700℃, the other phase will precipitate in the amorphous matrix, and it will worsen the soft magnetic properties. With increasing of anneal temperature, the fiber specific saturation magnetism decreases, the volume fraction of nanocrystalline increases and the amorphous decreases. The dominant influence on specific saturation magnetism is attributed to nanocrystalline.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2006年第12期2005-2007,共3页
Rare Metal Materials and Engineering
基金
四川省青年科技基金(04ZQ026-008)
