Martensitic transformation behaviors and magnetic properties of Ni–Mn–Ga rapidly quenched ribbons

Martensitic transformation behaviors and magnetic properties of Ni–Mn–Ga rapidly quenched ribbons
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Ni-Mn-Ga快淬薄带的马氏体相变行为及磁性能

DOI:
10.1016/j.matlet.2009.01.035
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发表时间:
2009-05
期刊:
影响因子:
3
通讯作者:
--
中科院分区:
材料科学3区
文献类型:
--
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本文讨论了Ni50Mn28+xGa22−x(x= 0,1,2,3)合金和薄带的相变行为、结构以及薄带的磁性。急冷工艺降低了薄带的有序度,并引入一定的内应力,影响薄带的马氏体相变温度。薄带的组织为7M调制马氏体,这与相应块体材料的5M调制马氏体不同。较高的退火温度和磁场退火均有利于薄带的磁化,这与薄带垂直于表面的取向增强有关。
In this paper, the phase transformation behaviors and structures of Ni50Mn28+xGa22−x(x=0, 1, 2, 3) alloys and ribbons as well as the magnetic properties of ribbons are discussed. Rapidly quenching process decreases the degree of order and introduces some internal stress, which influences the martensitic transformation temperatures of the ribbons. The structures of the ribbons become 7 M modulated, which is different from the 5 M modulated martensite of the corresponding bulk materials. Higher annealing temperature and annealing under magnetic field are all in favor of the magnetization of the ribbons, and this is related to the enhancement of orientation perpendicular to the surface of the ribbons.
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