Preparation method of rare earth alloy spherical single crystal magnetic powder and (111) oriented rare earth giant magnetostrictive material
A technology of giant magnetostriction and rare earth alloys, which is applied in the direction of magnetic materials, polycrystalline material growth, inductor/transformer/magnet manufacturing, etc., can solve the problems of reducing the size of magnetostriction and energy conversion efficiency, and achieve good orientation, single The effect of high crystallinity and simple process method
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[0031] Example 1
[0032] Preparation of Tb-Fe Alloy Cubic Laves Phase Spherical Single Crystal Magnetic Powder
[0033] Obtain TbFe by smelting method 1.95 The alloy (subscript is atomic ratio), mechanically crushed to obtain powder with a size of about 20μm-100μm as a raw material. Take 50 grams of TbFe 1.95 Alloy powder and Ca with a size of about 5μm 6 Al 2 O 9 The powder is in a ratio of 1:3 by weight, and mixed evenly after mechanical stirring.
[0034] The mixed TbFe 1.95 Alloy / Ca 6 Al 2 O 9 Put the powder into the annealing furnace and vacuum to 1×10 -3 Pa, blow argon to 0.06MPa, and heat the annealing furnace to 1240°C at 20° / min (higher than TbFe 1.95 Alloy melting point temperature), after holding for 10 minutes, the temperature is quickly reduced to 950°C, and after holding for 2 hours, it is cooled to room temperature with the furnace.
[0035] Soak TbFe with alcohol 1.95 Alloy / Ca 6 Al 2 O 9 Mix powder and get TbFe by ultrasonic cleaning 1.95 Alloy magnetic powder. TbFe ...
Example Embodiment
[0036] Example 2
[0037] Preparation of Sm-Fe alloy cubic Laves phase spherical single crystal magnetic powder, SmFe is prepared by atomization method 1.85 For alloy powder (subscript is atomic ratio), powder with a size of 50μm-100μm is selected as the raw material. Take 100 grams of SmFe 1.85 The alloy powder and the CaO powder with a size of about 2μm are in a ratio of 1:2 by weight, and mixed uniformly after mechanical stirring.
[0038] The mixed SmFe 1.85 The alloy / CaO powder is put into the annealing furnace and evacuated to 1×10 -3 Pa, blow argon to 0.1MPa, heat the annealing furnace to 860°C at 20° / min, keep it for 4 hours and then cool it down to room temperature.
[0039] Soak SmFe in alcohol 1.85 Alloy / CaO mixed powder, SmFe is obtained by ultrasonic cleaning 1.85 Alloy magnetic powder. Scanning electron microscopy shows that the particles are spherical in size ranging from 50 μm to 100 μm. XRD results confirmed SmFe 1.85 The crystal structure of the alloy is cubic lav...
Example Embodiment
[0040] Example 3
[0041] Tb 0.35 Dy 0.65 Fe 1.9 Preparation and Preparation of Alloy Cubic Laves Phase Spherical Single Crystal Magnetic Powder Oriented magnetostrictive material, obtain Tb by melting method 0.35 Dy 0.65 Fe 1.9 The alloy (subscript is atomic ratio), mechanically crushed to obtain powder with a size of about 20μm to 200μm as a raw material. Take 200 grams of Tb 0.35 Dy 0.65 Fe 1.9 The alloy powder and the CaO powder with a size of about 2μm are in a ratio of 1:3 by weight, and mixed evenly by mechanical stirring.
[0042] The mixed Tb 0.35 Dy 0.65 Fe 1.9 The alloy / CaO powder is put into the annealing furnace and evacuated to 1×10 -3 Pa, blow argon to 0.06MPa, heat the annealing furnace to 1290°C at 20° / min (higher than Tb 0.35 Dy 0.65 Fe 1.9 Alloy melting point temperature), after holding for 10 minutes, the temperature is quickly reduced to 1100°C, and after holding for 2 hours, it is cooled to room temperature with the furnace.
[0043] Soak Tb with alcohol 0.35 D...
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