摘要
真空感应熔炼法制备了多晶Ni52 Mn2 4 .4 Ga2 3.6 合金 ,对多晶合金进行了DSC分析和显微组织观察 ;采用粉末压缩压制的方法制备了粘结Ni52 Mn2 4 .4 Ga2 3.6 磁体 ;通过X射线衍射分析 ,讨论了外应力场和磁场对粘结Ni52 Mn2 4 .4 Ga2 3.6磁体马氏体相变的影响 ;测量了粘结Ni52 Mn2 4 .4 Ga2 3.6 磁体在磁场下的磁诱发应变。结果表明 :室温时粘结磁体在 1.2T的磁场下能产生 15 0ppm的饱和伸长应变。
Polycrystalline alloy Ni_ 52Mn_ 24.4Ga_ 23.6 was prepared by repeated induction melting and was observed by means of DSC analysis, optical microscopy and scanning microscope. Bonded Ni_ 52Mn_ 24.4Ga_ 23.6 magnets were prepared by powder compression method, and the effects of external stress and magnetic field on the martensitic transformation of bonded Ni_ 52Mn_ 24.4Ga_ 23.6 magnets were discussed by X-ray diffraction. Magnetic-induced strains (MFIS) of bonded Ni_ 52Mn_ 24.4Ga_ 23.6 magnets were measured. The results show that saturated MFIS with an expanse of 150ppm can be obtained by applying a magnetic field of about 1.2T at room temperature.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2005年第3期439-443,共5页
Journal of Materials Science and Engineering
基金
湖北省自然科学基金资助项目 (0 2JJY2 0 82 )
