Fe-based bulk amorphous alloy and method for preparing same

An amorphous alloy and bulk technology, applied in the field of Fe-based bulk amorphous alloy and its preparation, can solve problems such as affecting the soft magnetic properties of materials, and achieve the effects of improving remanence, simple process and improving magnetic properties

Inactive Publication Date: 2007-08-08
SHANGHAI UNIV
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Problems solved by technology

As a result, the existence of uniaxial planar magnetic domain anisotropy effect w...

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  • Fe-based bulk amorphous alloy and method for preparing same

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Embodiment 1

[0024] The composition (atomic percentage) of the iron-based bulk amorphous alloy in this embodiment is: Fe 53%, Nd 33%, Al 10%, B 4%. The preparation process and steps are as follows: Prepare 20 grams of industrially pure metal raw materials Fe, Nd, Al and FeB alloy according to the Fe-based bulk amorphous alloy composition of this embodiment, and then use a vacuum non-consumable electric arc furnace under the protection of argon Carry out smelting, the smelting current density is 150A / cm 2 , the smelted alloy was turned over and smelted 4 times; it was poured by copper mold negative pressure suction casting method to obtain a bulk amorphous alloy with a size of 1mm×10mm×80mm; 10 -3 Under pa conditions, annealing with an external pulsed magnetic field is carried out, the annealing time is 15 minutes, the frequency of the external pulsed magnetic field is 0.04 Hz, and the magnetic field strength is 5 T, and finally the iron-based bulk amorphous alloy of the present invention ...

Embodiment 2

[0027] The composition (atomic percentage) of the iron-based bulk amorphous alloy in this embodiment is: Fe 65%, Nd 27%, Al 6%, B2%. The preparation process and steps are as follows: prepare 30 grams of industrially pure metal raw materials Fe, Nd, Al and FeB alloy according to the composition of the Fe-based bulk amorphous alloy of this embodiment, and then use a vacuum non-consumable electric arc furnace under argon protection Carry out smelting, the smelting current density is 200A / cm 2 , the smelted alloy was turned over and smelted 4 times; it was poured by copper mold negative pressure suction casting method to obtain a bulk amorphous alloy with a size of 1mm×10mm×80mm; 10 -3 Under the condition of Pa, annealing with an external pulsed magnetic field is carried out. The annealing time is 25 minutes, the frequency of the external pulsed magnetic field is 0.025 Hz, and the magnetic field strength is 3 T. Finally, the iron-based bulk amorphous alloy of the present inventio...

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Abstract

The invention discloses a Fe-based block noncrystal alloy and making method, which comprises the following steps: (1) allocating raw material with 48-70% Fe, 23-37% Nd, 4-10% Al and 2-6% B; (2) adopting copper mould suction adsorbing casting method to make the non-crystal alloy; (3) adding 2-8T pulse magnetic field with frequency at 0.02-0.05Hz; annealing in the vacuum under 100-350 deg.c for 10-30 min.

Description

technical field [0001] The invention relates to an Fe-based bulk amorphous alloy and a preparation method thereof, belonging to the technical field of magnetic alloy materials and processing techniques. Background technique [0002] The research methods for nanocrystallization of amorphous alloys of magnetic materials mainly include conventional annealing method, flash annealing method, ultrashort pulse current treatment nanocrystallization method and radio frequency magnetic field treatment method. In 1990, Lu Ke proposed a new method for preparing nanocrystals—amorphous complete crystallization method. This method has the advantages of simple process, easy control of grain size, clean interface and no microvoids. This preparation method has been widely recognized by peers in the international nanomaterials community, and has become one of the three main preparation methods for international nanomaterials today. Chao Yuesheng and others from Northeastern University studied...

Claims

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Application Information

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IPC IPC(8): C22C45/00C22C33/04C21D1/78C21D1/26C21D10/00C21D1/02C22F1/00C22F3/00B22D18/06
Inventor 白琴徐晖蒙韬谭晓华赵文君吴胜军张士岩王海龙蔡平平
Owner SHANGHAI UNIV
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