Martensitic transformations in the powders of Ni-Mn-Ga alloys fabricated by a method of spark erosion

被引：0
|
作者：
Shcherba, A. A. [1 ]
Kokorin, V. V.
Perekos, A. O.
Olikhovska, L. O.
Boytsov, O. F.
Zakharchenko, S. M.
机构：
[1] Natl Acad Sci Ukraine, Inst Electrodynam, Kiev, Ukraine
[2] Natl Acad Sci Ukraine, Inst Magnetism, Kiev, Ukraine
[3] Natl Acad Sci Ukraine, Kurdyumov Inst Met Phys, Kiev, Ukraine
来源：
METALLOFIZIKA I NOVEISHIE TEKHNOLOGII | 2007年 / 29卷 / 02期
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中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The structure and magnetic properties of Ni-Mn-Ga alloy powders fabricated by the volume electroerosion method are investigated. The particles of a powder have a spherical form with an average size of similar to 2.7 mu m. As shown by x-ray analysis, the particles are in a martensitic state at the room temperature. The magnetization of powder particles is substantially increased during the process of annealing that specifies on the increase of the atomic long-range order degree (of L2(1) type) in a solid solution based on the Ni2MnGa compound. The used method of the electroerosion dispersion provides the high-rate cooling of particles that, probably, allows preventing an atomic long-range ordering in most powder particles.
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页码：201 / 210
页数：10
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