Extended Data Fig. 3: Cross-sectional TEM images of the superlattice steel subjected to 2350 dpa at a, 400 °C and b, 600 °C under different objective lens (OL) focus conditions. | Nature Materials

Extended Data Fig. 3: Cross-sectional TEM images of the superlattice steel subjected to 2350 dpa at a, 400 °C and b, 600 °C under different objective lens (OL) focus conditions.

From: Superior radiation tolerance via reversible disordering–ordering transition of coherent superlattices

Extended Data Fig. 3

No voids were observed in both cases. (a1, b1) Cross-sectional TEM images showing the radiation damage along the radiation depth. The investigated layer (200 ~ 320 nm) was indicated by two vertical dashed lines. (a2-a4) Cross-sectional TEM images of the investigated layer (200 ~ 320 nm deep) of the superlattice steel irradiated at 400 °C taken at a2, underfocus, a3, in focus, and a4 overfocus conditions. (b2-b4) Cross-sectional TEM images of the investigated layer (200 ~320 nm deep) in the superlattice steel irradiated at 600 °C taken at b2, underfocus, b3, in focus, and b4, overfocus conditions. The defocus distance is ±2 μm.

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