Method for improving performance of sintered Nd-Fe-B permanent magnetic material
A permanent magnet material, neodymium iron boron technology, applied in the direction of magnetic materials, inorganic materials, magnetic objects, etc., can solve the problems of product mechanical properties and corrosion resistance, small practical size, etc., to reduce residual magnetism and reduce consumption , cost-saving effect
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Embodiment 1
[0025] (1) The NdFeB quick-setting sheet is made by the quick-setting process, and its composition is Nd 31.5 co 1.2 B 0.95 Cu 0.04 Fe 66.31 .
[0026] (2) Using a high-energy ball mill, the heavy rare earth compound DyF 3 Ball milled to less than 1 μm. Use high-purity alcohol such as analytical pure alcohol as a protective medium during the ball milling process, and the ball milling time is 30-60 minutes.
[0027] (3) Put the prepared quick-setting sheet into 3% (volume ratio) nitric acid alcohol solution and perform ultra-cleaning for 2 minutes to remove surface oxide scales and impurity substances, and carry out grain boundary corrosion simultaneously.
[0028] (4) Configure DyF with high-purity alcohol such as analytical pure alcohol 3 Suspension, the mass percentage of the solution is 1%, put the quick-setting sheet after grain boundary corrosion into the suspension, and carry out ultrasonic coating for 15 minutes, so that the surface is evenly coated with a layer ...
Embodiment 2
[0034] (1) The NdFeB quick-setting sheet is made by the quick-setting process, and its composition is Nd 30.5 co 1.2 B 0.95 Cu 0.04 Fe 67.31 .
[0035] (2) Using a high-energy ball mill, the heavy rare earth compound TbH x(Hydrogen-absorbing compounds of terbium) ball milled to less than 1 μm. Use high-purity alcohol such as analytical pure alcohol as a protective medium during the ball milling process, and the ball milling time is 30-60 minutes.
[0036] (3) Put the prepared quick-setting sheet into 3% (volume ratio) nitric acid alcohol solution and perform ultra-cleaning for 2 minutes to remove surface oxide scales and impurity substances, and carry out grain boundary corrosion simultaneously.
[0037] (4) Configure TbH with analytical pure alcohol x Suspension solution, the mass percentage of the solution is 1%. Put the quick-setting tablet after grain boundary corrosion into the suspension solution, and perform ultrasonic coating for 15 minutes, so that the surface ...
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