A method for studying the oxidation process of a metal thin film transmission electron microscope sample
A technology for transmission electron microscope samples and metal thin films, applied in the field of detection, can solve the problems of complex structure of oxide layer on the surface of metal materials, high cost, long sample time, etc., and achieves easy preparation of metal oxides, simple test steps, and simple test instruments. Effect
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Embodiment 1
[0035] The material is stainless steel with a single-phase face-centered cubic structure. Thin slices of 3 mm × 5 mm × 0.5 mm were cut by electric discharge, and ground with water sandpaper to a thickness of 50 μm. The Φ3 mm sample was cut and double-jet thinned to prepare a thin area: the electrolyte was 10% methanol solution of perchloric acid, the polishing voltage was 24 V, the current was 85 mA, and the temperature was -20°.
[0036] Step 1. Load the above prepared transmission electron microscope into FEI Talos F200X transmission electron microscope for microstructure characterization. The typical structure is single-phase austenite. Select a region near a crack to collect transmission electron microscope images. figure 1 As shown in a, and photographed the diffraction spots of austenite obtained by electron diffraction, figure 1 as shown in b.
[0037] Step 2, the sample in step 1 is taken out from the transmission electron microscope, and placed on the steel sheet st...
Embodiment 2
[0041] The material is stainless steel with a single-phase face-centered cubic structure. Thin slices of 3 mm × 5 mm × 0.5 mm were cut by electric discharge, and ground with water sandpaper to a thickness of 50 μm. The Φ3 mm sample was cut and double-jet thinned to prepare a thin area: the electrolyte was 10% methanol solution of perchloric acid, the polishing voltage was 24 V, the current was 85 mA, and the temperature was -20°.
[0042] Step 1. Load the above prepared transmission electron microscope into FEI Talos F200X transmission electron microscope for microstructure characterization. The typical structure is single-phase austenite. Select two grain boundary regions of coarse grains to collect transmission electron microscope images. Figure 4 As shown in a, and photographed the diffraction spots of austenite obtained by electron diffraction, Figure 4 as shown in b.
[0043] Step 2, the sample in step 1 is taken out from the transmission electron microscope, and placed...
Embodiment 3
[0047] The material is a CoCrFeNi high-entropy alloy with a single-phase face-centered cubic structure. Thin slices of 10 mm × 10 mm × 0.4 mm were cut by electric discharge and ground with water sandpaper to a thickness of 60 μm. The Φ3 mm sample was cut and double-jet thinned to prepare a thin area: the electrolyte was 10% methanol solution of perchloric acid, the polishing voltage was 26 V, the current was 100 mA, and the temperature was -20°.
[0048] Step 1. Load the above prepared transmission electron microscope into FEI Talos F200X transmission electron microscope for microstructure characterization. The typical structure is single-phase austenite. Select the vicinity of the thin area containing square holes to collect transmission electron microscope images. Figure 7 As shown in a, and photographed the diffraction spots of austenite obtained by electron diffraction, Figure 7 as shown in b.
[0049] Step 2, the sample in step 1 is taken out from the transmission ele...
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