Jsm 7500f scanning electron microscope

The UV-vis spectra of the FL-MoS₂ suspensions were recorded on a UV-1800PC spectrometer (Shanghai Mapada), and a quartz cell with a path length of 1.0 cm was used as the sample pool. The SEM images were obtained using a JEOL JSM-7500F scanning electron microscope, with an Au film coating (20 mA for 50 s) before SEM observation. The TEM images were measured using a field-emission transmission electron microscope (JEOL, JEM-2100) with an accelerating voltage of 200 kV. The Raman spectra were obtained using a Raman spectrometer (LabRAM HR Evolution, HORIBA JobinYvon, France) at 525 nm, and the powder samples were prepared on a SiO₂/Si substrate. The X-ray diffraction (XRD) patterns were recorded on an XD-3 X-ray diffractometer (Beijing Purkinje General Instrument Co., Ltd., China) with a Cu Kα irradiation (λ = 0.15406 nm). The Fourier transformed infrared (FT-IR) spectra were recorded on a Bruker-Equinox 55 spectrometer in a transmittance mode in a wavenumber range of 4000 to 400 cm⁻¹. The atomic force microscopy (AFM) measurement was performed on a Bruker NanoScope V instrument in a tapping mode. The N₂ adsorption-desorption isotherms were obtained on a Surface Area and Porosity Analyzer (ASAP 2460, Micromeritics).

The substrate material used in the experiment was EH40 high-strength low-temperature steel, obtained from China Baowu Steel Group Corporation. The chemical compositions (wt.%) of EH40 steel were 0.16 C, 0.15 Si, 0.90 Mn, 0.10 V, 0.20 Cr, 0.02 Nb, 0.020 Al, 0.08 Mo, 0.35 Cu, 0.40 Ni, 0.02 Ti, and Fe balance. The EH40 steel was in the normalized condition and consisted mainly of polygonal ferrite (PF) and pearlite (P) structures. Prior to the cladding process, the surface of the EH40 steel was ground using 80# sandpaper to remove rust layers. Macroscopic morphology and metallographic structure of EH40 substrate steel are shown in Figure 1.
Co-based alloy powder (Höganäs, Shanghai, China) with the elemental composition (wt.%) of 1.4 C, 7.7 W, 0.2 Ni, 0.2 Fe, 27.6 Cr, 1 Si, and Co balance was used as the binder phase for the composite coatings. The micromorphology of the Co-based powder was observed using JEOL JSM-7500F scanning electron microscope (SEM, JEOL, Tokyo, Japan), and the powder phase compositions were examined by PANalytical X’Pert PRO X-ray diffractometer (XRD, PANalytical B.V., Almelo, The Netherlands) with a Cu-Kα radiation over a 2θ range of 20°–80°. The results of SEM and XRD are shown in Figure 2. Figure 2a shows that the powder has uniform particle size and good sphericity, ensuring smooth flow during the cladding process.

The substrate material used in the experiment was EH40 high-strength low-temperature steel, obtained from China Baowu Steel Group Corporation. The chemical compositions (wt.%) of EH40 steel were 0.16 C, 0.15 Si, 0.90 Mn, 0.10 V, 0.20 Cr, 0.02 Nb, 0.020 Al, 0.08 Mo, 0.35 Cu, 0.40 Ni, 0.02 Ti, and Fe balance. The EH40 steel was in the normalized condition and consisted mainly of polygonal ferrite (PF) and pearlite (P) structures. Prior to the cladding process, the surface of the EH40 steel was ground using 80# sandpaper to remove rust layers. Macroscopic morphology and metallographic structure of EH40 substrate steel are shown in Figure 1.
Co-based alloy powder (Höganäs, Shanghai, China) with the elemental composition (wt.%) of 1.4 C, 7.7 W, 0.2 Ni, 0.2 Fe, 27.6 Cr, 1 Si, and Co balance was used as the binder phase for the composite coatings. The micromorphology of the Co-based powder was observed using JEOL JSM-7500F scanning electron microscope (SEM, JEOL, Tokyo, Japan), and the powder phase compositions were examined by PANalytical X’Pert PRO X-ray diffractometer (XRD, PANalytical B.V., Almelo, The Netherlands) with a Cu-Kα radiation over a 2θ range of 20°–80°. The results of SEM and XRD are shown in Figure 2. Figure 2a shows that the powder has uniform particle size and good sphericity, ensuring smooth flow during the cladding process.

SEM images of the cross-sectional surfaces of the swollen CMCG specimens were obtained following sample preparation as follows. After swelling in PBS at 298 K for 24 h, each CMCG was carefully cut using a razor blade, frozen at −70 °C, and freeze-dried under vacuum. The freeze-dried samples were fixed on specimen stubs that had been sputter-coated with a layer of platinum (4 nm thickness) prior to observation. The SEM images were obtained using a JEOL JSM-7500F scanning electron microscope (JEOL Ltd., Akishima, Japan) at an acceleration voltage of 5.0 kV.