Fe-Zr-B纳米晶合金的热膨胀和磁性研究

金属学报, 1994, 30(18): 265-269.

Fe-Zr-B纳米晶合金的热膨胀和磁性研究

卢志超 , 鲜于泽 , 沈保根 , 吕曼祺

东北大学

中国科学院物理研究所

基金项目: 中国科学院金属研究所快速凝固非平衡态合金开放实验室资助

关键词：热膨胀 , saturation magnetic moment , nanocrystalline alloy , amorphous alloy , Fe-Zr-B alloy

THERMAL EXPANSION AND MAGNETIC PROPERTIES OF NANOCRYSTALLINE Fe-Zr-B ALLOYS

LU Zhichao , XIANYU Ze (Department of Physics , Northeastern University , Shenyang)SHEN Baogen((Institute of Physics

Keywords： :thermal expansion , 饱和磁矩 , Ｆｅ－Ｚｒ－Ｂ合金 , 纳米晶 , 非晶

将非晶态Ｆｅ－Ｚｒ－Ｂ合金经不同温度退火制备成纳米晶合金，测量了它们的热膨胀曲线和饱和磁化强度．初步结果表明，纳米晶的形成导致Ｃｕｒｉｅ温度（ＴＣ）以下的热膨胀系数和７７Ｋ下的饱和磁矩急剧增加，而ＴＣ以上的热膨胀系数几乎不随退火温度变化，用因瓦效应解释了实验结果．

Thermal expansion curves and magnetic properties for the nanocrystalline Fe-Zr-B alloys prepared by annealing amorphous alloys at various temperatures were measured. Preliminary results show that the formation of nanocrystallites gives a drastic increase of the thermal expansion coefficient below Curie temperature TC and the saturation magnetic moment at 77 K, while the expansion coefficient above the TC remains almost unchanged as annealing temperature increase. Invar effect has been proposed to explain the observed results.

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