永磁性Pr_(55)Al_(12)Fe_(30)Cu_3大块金属玻璃  

Hard magnetic Pr_(55)Al_(12)Fe_(30)Cu_3bulk metallic glass

作　　者：李正[1] 白海洋[1] 赵德乾[1] 潘明祥[1] 王万录[2] 汪卫华[1] 

机构地区：[1]中国科学院物理研究所,北京100080 [2]重庆大学数理学院应用科学与技术系,重庆400044

出　　处：《物理学报》2003年第3期652-655,共4页Acta Physica Sinica

基　　金：国家自然科学基金 (批准号 :5 0 1710 75 ;5 0 0 3 10 10和 10 1740 88);国家高技术研究发展计划 (批准号 :2 0 0 1AA3 2 0 70 3 )资助的课题~~

摘　　要：报道一个新的Pr55Al1 2 Fe30 Cu3大块金属玻璃 .采用铜模吸铸法制备了直径为 5mm、长度达 10 0mm的Pr55Al1 2 Fe30Cu3大块金属玻璃 .差示扫描量热分析结果表明在该Pr基大块金属玻璃体系具有宽达 6 4K左右的过冷液相区 ,而且该合金呈非晶态时的熔化温度要比相应晶态样品的熔化温度高约 14 0K .磁滞回线测量表明非晶态Pr55Al1 2 Fe30Cu3块体合金在室温下呈现永磁特性 ,而完全晶化后样品在室温下呈现软磁特性 .In this paper we report the formation of a new Pr-55 Al-12 Fe-30 Cu-3 bulk metallic glass. Cylindrical Pr-55 Al-12 Fe-30 Cu-3 specimens of 5 mm in diameter and 100 mm in length were prepared by copper mold suction casting. Differential scanning calorimetry results indicated that the Pr-based bulk metallic glass system has a wide supercooled liquid region about 64K. The melting temperature of the amorphous state is about 140K higher than that of its crystalline state. Hysteresis loops were measured, and the results indicated that the Pr-55 Al-12 Fe-30 Cu-3 bulk metallic has hard magnetic property, while the completely crystallized alloy has soft magnetic property at room temperature.

关 键 词：Pr55Al12Fe30Cu3大块金属玻璃 晶化 永磁性 铜模吸铸法 熔化 合金体系 

分 类 号：TG139[一般工业技术—材料科学与工程]