Ni52Ga28Fe20-xCOx合金的马氏体相变和磁性转变

金属学报, 2006, 42(1): 93-98. doi: 10.3321/j.issn:0412-1961.2006.01.017

Ni52Ga28Fe20-xCOx合金的马氏体相变和磁性转变

罗丰华 ^1, , 陈嘉砚 ^2, , 及川胜男 ^3, , 石田清仁 ^4,

1.中南大学粉末冶金国家重点实验室,长沙,410083

2.钢铁研究总院结构材料研究所,北京,100081

3.钢铁研究总院结构材料研究所,北京,100081

4.东北大学工学部材料科学系,仙台,980-8579,日本

基金项目: 日本能源与产业技术综合开发机构产业技术研究项目

关键词：铁磁性记忆合金 , Ni-Ga-Fe-Co合金 , L10马氏体相

MARTENSITIC TRANSFORMATION AND MAGNETIC TRANSITION OF Ni52Ga28Fe20-xCox ALLOY

利用金相和SEM显微组织分析技术,示差扫描量热法(DSC)和振动磁力计(VSM)考察了Ni52Ga28Fe20-xCox合金中Co元素含量x对马氏体相变和铁磁性转变的影响,用粉末X射线衍射方法(XRD)分析马氏体相的结构类型.在x≤6的范围内Co代替Fe能够显著提高Ni52Ga28Fe20-xCox合金的马氏体相变温度,对铁磁性转变Curie点的影响不大.x每增加1可以使马氏体相变温度提高50-60 K.低温淬火(773 K/1 h)对Ni52Ga28Fe20-xCox合金马氏体相变温度的影响不大,但使合金的Curie点提高20-30 K.粉末XRD分析表明该合金系列经1423和773 K两种温度处理后都只出现L10(2 M)马氏体.

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Ni52Ga28Fe20-xCOx合金的马氏体相变和磁性转变

MARTENSITIC TRANSFORMATION AND MAGNETIC TRANSITION OF Ni52Ga28Fe20-xCox ALLOY

参考文献