Preparation method of GHz-frequency-band high-wave-absorbing-performance iron-based nanocrystalline alloy
An iron-based nanocrystal and alloy technology, applied in nanotechnology, nanotechnology, metal processing equipment and other directions, can solve the problems of deteriorating absorption performance, large magnetic permeability, reducing material magnetic permeability, etc., and achieves a simple and easy preparation process. , Increase the number of grain boundaries and improve the effect of impedance matching
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Embodiment 1
[0027] Step 1. Set the formula to Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 The amorphous thin strip is put into a tube furnace for rapid annealing to make it crystallized to obtain an iron-based nanocrystalline alloy thin strip; the rapid annealing process is as follows:
[0028] Step 1.1, heating the amorphous thin ribbon at a heating rate of 20°C / s to rapidly increase the temperature.
[0029] Step 1.2, when the temperature of the tube furnace rises to 600°C, a constant temperature heat preservation treatment is performed, the constant temperature is 600°C, and the heat preservation time is 30s;
[0030] In step 1.3, the temperature of the tube furnace is then water-cooled to room temperature to obtain an iron-based nanocrystalline alloy ribbon with a thickness of 25 μm.
[0031] Step 2: Putting the iron-based nanocrystalline alloy thin strip obtained in step 1 into a planetary ball mill for flake processing to obtain an iron-based nanocrystalline alloy with high wave-absorbing pe...
Embodiment 2
[0044] Step 1, set the formula as Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 Put the amorphous strip into a tube furnace for rapid annealing to crystallize it to obtain a thin iron-based nanocrystalline alloy; the rapid annealing process is:
[0045] Step 1.1, heating the amorphous ribbon at a heating rate of 20° C. / s to rapidly raise the temperature.
[0046] Step 1.2. When the temperature of the tube furnace rises to 600°C, perform constant temperature and heat preservation treatment. The constant temperature is 600°C, and the heat preservation time is 3 minutes;
[0047] Step 1.3, then water-cool the temperature of the tube furnace to room temperature to obtain an iron-based nanocrystalline alloy ribbon with a thickness of 25 μm.
[0048] Step 2. Put the iron-based nanocrystalline alloy ribbon obtained in step 1 into a planetary ball mill for flake treatment to obtain an iron-based nanocrystalline alloy with high wave-absorbing performance in the GHz frequency band. The flaking pr...
Embodiment 3
[0059] Step 1, set the formula as Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 Put the amorphous strip into a tube furnace for rapid annealing to crystallize it to obtain a thin iron-based nanocrystalline alloy; the rapid annealing process is:
[0060] Step 1.1, heating the amorphous ribbon at a heating rate of 20° C. / s to rapidly raise the temperature.
[0061] Step 1.2. When the temperature of the tube furnace rises to 540°C, perform constant temperature and heat preservation treatment. The constant temperature is 540°C, and the heat preservation time is 8 minutes;
[0062] Step 1.3, then water-cool the temperature of the tube furnace to room temperature to obtain an iron-based nanocrystalline alloy ribbon with a thickness of 25 μm.
[0063] Step 2. Put the iron-based nanocrystalline alloy ribbon obtained in step 1 into a planetary ball mill for flake treatment to obtain an iron-based nanocrystalline alloy with high wave-absorbing performance in the GHz frequency band. The flaking pr...
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