摘要
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 Ni_(52)Ga_(28)Fe_(20-x)Co_x 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 Ni_(52)Ga_(28)Fe_(20-x)Co_x 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—60K．低温淬火(773K/1h)对 Ni_(52)Ga_(28)Fe_(20-x)Co_x 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773K 两种温度处理后都只出现 L1_0(2M)马氏体．
The effects of Co content x on the martensitic and magnetic transition of Ni52Ga28Fe20-xCox alloys were investigated by optical micrography, SEM, DSC and VSM methods. The structure type of martensitic phase was determined by powder X-ray diffraction （XRD）. Maxtensitic tranformation temperatures of Ni52Ga28Fe20-xCox alloys could be elevated quickly by the substitute of Co for Fe element in the Co content range of x ≤6, whereas their curie points axe unchanged, x value increased by 1 can increase the martensitic transformation temperature by 50-60 K. Annealing at 773 K for 1 h doesn＇t change the martensitic transformation temperatures, of studied alloys but increases their Curie points by 20-30 K. XRD patterns showed that only L10 （2 M） type of martensitic phases appeared in powder samples both annealed at 1423 K and at 773 K.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第1期93-98,共6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~~
