Open AccessStructure and properties of the ferromagnetic shape-memory alloy Co50Ni20Ga30-xSix
Author(s) -
Dai Xue-Fang,
Chengguo Sun,
Qu Jing-Ping,
Yangxian Li,
Zhu Wu,
Jinglan Chen,
Guangheng Wu
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.8602
Subject(s) - materials science , condensed matter physics , austenite , curie temperature , ferromagnetism , diffusionless transformation , martensite , atom (system on chip) , shape memory alloy , alloy , magnetization , magnetism , anisotropy , radius , metallurgy , microstructure , magnetic field , physics , optics , computer security , quantum mechanics , computer science , embedded system
The structuremartensitic transformation and magnetism have been studied in the CoNiGa alloys after certain Ga substrated by Si. From the experimental resultswe found that the alloy can form pure body-centered cubic structure accompanied by good thermal martensitic transformation when the atom ratio of Si lies in the range 0—10%. It can be concluded from further analysis that it is not only the radius of the doped atom but also the radius ratio of the doped atom and the host atom that affect the stability of the austenite. At the same timeit can be found that the Curie temperature and the saturated magnetization decrease with increasing Si. But the anisotropy of the martensite increases with the increasing Siwhich is of significance for obtaining large magnetically-induced-strain.