At the same time, in situ XRD heating from room temperature to 1100 ☌ and EDS analysis at 1020 ☌ provide auxiliary analysis of phase transition from CuO to Cu 2O during in situ TEM heating. The changing process of shrinking and final disappearance is studied by in-depth and detailed research. During thermal analysis, in situ TEM heating is conducted from room temperature to 1120 ☌, accompanied by the appearance and evolution of porous membrane areas and fusion areas. These results confirm the advantages of smooth surface, and uniform and good crystalline array structure with a thickness of several tens of nanometers. The basic diffraction patterns and the fine structure in the patterns including specimen tilting experiments, orientation relationship determination, phase identification, twinning, second phases, crystallographic information, dislocation, preferred orientation and texture, extra spots and streaks are described in detail. The initial morphology and structure of the prepared CuO NSs are explored by scanning electron microscopy, energy dispersive spectrometer (EDS), transmission electron microscopy (TEM), selected area electron diffraction (SAED), and X-ray diffraction (XRD). To spatially calibrate the image, zoom in on the scale bar, select it with the straight line selection tool, then select Analalyze/Set Scale. The thermal characteristics are further accounted for by studying the morphological and structural evolution at different temperatures. Scale bar with with straight line selection. This study sheds light on the development of high-performance high-entropy alloys with novel crystalline-amorphous nanostructures and provides significant insight into their plastic deformation mechanisms.CuO nanosheets (NSs) are synthesized by a one-step template-free solution method. The atomic observations reveal that co-deformation cooperative mechanisms include the well-retained dislocation activities in nanograins but crystallization in amorphous grain boundaries, which subsequently lead to the grain coarsening via grain boundary-mediated plasticity. Such crystalline-amorphous nanostructured layer shows an ultrahigh yield strength of ∼ 6.0 GPa and a compression strain of ∼ 25 % during the localized micro-pillar compression tests. In this work, a facile laser surface remelting technique with rapid cooling rate was successfully developed to fabricate a ∼ 100 μm-thick gradient nanostructured layer accompanied by phase decomposition on a TiZrHfTaNb 0.2 high-entropy alloy, where a ∼ 5 μm-thick crystalline-amorphous nanostructured top surface layer with an average grain size of ∼ 7 nm was obtained. Heterogeneous crystalline-amorphous nanostructures have been documented to show superior strength-ductility synergy via the co-deformation cooperative effects of nanograins and amorphous grain boundaries.

Tem saed pattern analysis