Co41Ni32Al27-xSix合金的马氏体相变和磁性转变

金属学报, 2005, 41(7): 680-684. doi: 10.3321/j.issn:0412-1961.2005.07.002

Co41Ni32Al27-xSix合金的马氏体相变和磁性转变

罗丰华 ^1, , 及川胜成 ^2, , 石田清仁 ^3,

1.中南大学粉末冶金国家重点实验室,长沙,410083;日本产业技术综合研究所东北中心,仙台,983-8551

2.日本产业技术综合研究所东北中心,仙台,983-8551

3.日本东北大学工学部,仙台,980-8579

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 , Co-Ni-Al-Si合金 , 马氏体相(L10)

MARTENSITIC TRANSFORMATION AND MAGNETIC TRANSITION OF Co41Ni32Al27-xSix Alloy

利用金相显微组织分析技术、示差扫描量热法(DSC)和振动磁力计(VSM),考察了Co41Ni32Al27-xSix合金中Si元素含量x对马氏体相变和铁磁性转变的影响,用X射线衍射方法分析马氏体相的结构类型.增加x能够显著提高合金的马氏体相变温度,并且同时提高铁磁性转变Curie点;在x≤5的范围内,x增加1可以造成马氏体相变温度提高50-60 K,同时Curie点提高大约10 K;马氏体相的晶体结构仍然是L10型有序结构,但是随着x的增加,单胞体积减小.讨论了马氏体相变温度和Curie点同时提高的原因.

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Co41Ni32Al27-xSix合金的马氏体相变和磁性转变

MARTENSITIC TRANSFORMATION AND MAGNETIC TRANSITION OF Co41Ni32Al27-xSix Alloy

参考文献