Magnetocaloric effect in Er-Al-Co bulk metallic glasses  

作　　者：HUI XiDong XU ZhiYi WU Yuan CHEN XiaoHua LIU XiongJun LU ZhaoPing 

机构地区：[1]State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

出　　处：《Chinese Science Bulletin》2011年第36期3978-3983,共6页

基　　金：supported by the National Natural Science Foundation of China (50871013 and 51071018);the National Basic Research Program of China (2007CB613901)

摘　　要：A series of Er-Al-Co bulk metallic glasses (BMGs) have been prepared by the copper mold casting method. The glass forming ability and magnetocaloric effect (MCE) for these alloys have been investigated. The second-order magnetic transition from para-magnetic to ferromagnetic states takes place at about 9 K. These BMGs exhibit excellent MCE because of their large effective magneton number; Er56Al24Co20 BMG has a maximum entropy change and refrigeration capacity of 16.06 J kg-1 K-1 and 546 J kg-1,respectively,under the field of 50 kOe (10 kOe=795.775 kA/m) indicating that these BMGs are potential candidate magnetic materials for hydrogen liquefaction.A series of Er-Al-Co bulk metallic glasses （BMGs） have been prepared by the copper mold casting method. The glass forming ability and magnetocaloric effect （MCE） for these alloys have been investigated. The second-order magnetic transition from para-magnetic to ferromagnetic states takes place at about 9 K. These BMGs exhibit excellent MCE because of their large effective magneton number; Er56Al24Co20 BMG has a maximum entropy change and refrigeration capacity of 16.06 J kg-1 K-1 and 546 J kg-1,respectively,under the field of 50 kOe （10 kOe=795.775 kA/m） indicating that these BMGs are potential candidate magnetic materials for hydrogen liquefaction.

关 键 词：大块金属玻璃 磁热效应 块体非晶合金 玻璃形成能力 钴 铝 磁性材料 铸造方法 

分 类 号：TG139.8[一般工业技术—材料科学与工程] TB64[金属学及工艺—合金]