摘要
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.
The effects of Si on the martensitic transformation and magnetic transition of Co41Ni32Al27-x:Six alloys were investigated by optical micrography, DSC and VSM methods. The structure type of martensitic phase was determined by X-ray diffraction. Martensitic transformation temperatures of Co41Ni32Al27 alloys are obviously elevated by the substitute of Si for Al element, the addition of 1% Si can increase the martensitic transformation temperature by about 50 K. Curie points are also increased with increasing of Si content, 1% Si can increase the Curie temperature by 10 K. Martensites are all of ordered L10 structure, but the unit cell volumes are decreased with increasing Si content. The reason for above results were discussed.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第7期680-684,共5页
Acta Metallurgica Sinica
基金
日本能源与产业技术综合开发机构2002年度产业技术研究项目
