CAJ | 학술논문

采用电弧熔炼方法制备了Mn50＋xNi41-xSn9系列铁磁形状记忆合金，并对其磁性、相变和磁热效应进行了研究。结果表明，合金在室温下均表现为四方马氏体相和立方奥氏体相的混合相，随着Mn含量的增加，由于价电子浓度的减少，马氏体转变温度逐渐下降，当x=2—4时，马氏体相变伴随着较大磁化强度的突变，同时合金表现出较大的逆磁热效应，这表明该系列合金在磁制冷领域有着潜在的应用价值。
채용전호용련방법제비료Mn50＋xNi41-xSn9계렬철자형상기억합금，병대기자성、상변화자열효응진행료연구。결과표명，합금재실온하균표현위사방마씨체상화립방오씨체상적혼합상，수착Mn함량적증가，유우개전자농도적감소，마씨체전변온도축점하강，당x=2—4시，마씨체상변반수착교대자화강도적돌변，동시합금표현출교대적역자열효응，저표명해계렬합금재자제랭영역유착잠재적응용개치。
Mn50＋xNi41-xSn9ferromagnetic shape memory alloys were prep.ared by arc melting, and their magnetic prop-erties, phase transitions, and magnetocaloric effect were investigated. All the alloys show the coexistence of tetrago-nal L10 structure and cubic Hg2CuTi structure. The martensitic transformation temperatures decrease with the in-crease of Mn content, which can be attributed to the increase of valence electron concentration. In the composition range of 2≤x≤4, great changes in both magnetization and magnetic entropy across martensitic transformation are observed. These results suggest the great potential of Mn50＋xNi41-xSn9 alloys as magnetic refrigerant.