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). Martensitic 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 are 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.
|Number of pages||6|
|Journal||Jinshu Xuebao/Acta Metallurgica Sinica|
|Publication status||Published - 2006 Jan|
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