Preparation method of TEM electrolytic double-spray film sample of small-sized metal material
A technology of electrolytic double-spraying and metal materials, applied in the preparation of test samples, etc., can solve the problems of failure and fragmentation of nanocrystalline dual-phase rare earth permanent magnetic alloy TEM products, achieve good polishing effect, simple production, and shorten the preparation time the effect of time
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[0020] The technical scheme designed by the present invention comprises the steps:
[0021] 1) Prepare gasket:
[0022] Grind the surface of the low-carbon low-alloy steel material with 400-1200 sandpaper, and then use HF and H 2 o 2 The mixed solution is chemically thinned until it is reduced to 50-80 μm, and punched into a disc with an outer diameter of 3 mm and an inner hole diameter smaller than the narrow side of the metal sample with a punching machine, and then uses 800-1200 No. The curling generated in the process is ground flat, that is, a low-carbon low-alloy gasket is prepared; the carbon content of the low-carbon low-alloy steel material is less than 0.3% by weight, and the weight percentage content of the alloy is less than 5%.
[0023] 2) Grind a metal sample with a size of less than 2.5mm into a thickness of 50-80 μm and paste it on the gasket to ensure that the entire inner hole of the gasket is covered, that is, the size of the sample is successfully expande...
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