Method of producing bulk amorphous alloy material with excellent mechanical performances and high-magnetostriction

Abstract

The invention discloses a bulk amorphous alloy with both fine mechanical property and high magnetoconstriction and a preparation method thereof. The bulk amorphous alloy has the following chemical formula: (FeaNbbBc) 1-xTbx, wherein, a is more than or equal to 65 and less than or equal to 75, b is more than or equal to 2 and less than or equal to 8, c is more than or equal to 20 and less than or equal to 25, x is more than or equal to 1 and less than or equal to 10, and a plus b plus c equals 100. For the bulk amorphous alloy, materials are mixed according to a general formula of FeaNbbBc; first, the FeaNbbBc is smelted into master alloy, and then a master alloy spindle is ground into small pieces; Tb metal is added according to atomic ratio of (FeaNbbBc) 1-xTbx; a bar-shaped alloy sampleis obtained by putting the raw materials to an induction furnace for melting and carrying out direct spray casting; as a result, volatilization of rare earth element Tb can be reduced. The bulk amorphous alloy of the invention has a magnetostriction coefficient ranging from 398ppm to 976ppm; meanwhile, the alloy has simple components, high thermal stability and fine mechanical performance and amorphous forming capacity. The Fe-based bulk amorphous alloy of the invention can be widely applied to magnetic materials such as magnetostriction materials and the like.

Description

technical field

[0001] The invention relates to the field of amorphous magnetic materials, in particular to a method for preparing a bulk amorphous alloy with excellent mechanical properties and high magnetostriction. Background technique

[0002] When the magnetization state is changed in a magnetic field, ferromagnetic and ferrimagnetic materials cause small changes in size or volume, a phenomenon known as magnetostriction. The magnitude of the magnetostrictive effect is represented by the magnetostrictive coefficient λ. Its value is λ=δl / l, l and δl are the original length of the magnet and the length change after magnetization. The traditional magnetostrictive materials are Ni and Fe-based alloys. The saturation magnetostriction coefficient λs of such metals and alloys is (±30~70)×10 -6 , because the λ of this type of material is too small, the scope of application is limited. In the early 1960s, it was discovered that rare earth elements (R) have many unique magneti...

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