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Abstract: Elemental powders of Ti, Al and C were mechanically milled as starting materials for the fabrication of ternary carbide Ti3AlC2 by spark plasma sintering (SPS) technique. The effect of Al content in the starting materials on the Ti3AlC2 synthesis was investigated. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were employed to determine the phase identification and observe the microstructure of the synthesized samples. With increasing proper Al content, it was found that the purity of Ti3AlC2 increased and the sintering temperature reduced. The dense and high-purity Ti3AlC2 could be successfully fabricated from 3Ti/1.2Al/2C powders at a lower sintering temperature of 1050°C, holding for 10min. In addition, the reaction path for the formation of Ti3AlC2 in the present study was proposed. [Copyright &y& Elsevier]

• The Fe-Cr-Ni based composite coating was prepared using laser cladding method. • The addition of rare earth elements makes the cladding layer more dense and more refined. • Increased tensile strength, increased yield strength and increased impact value. Laser cladding technology was used to prepare Fe314 coating with added CeO 2 and La 2 O 3 on the surface of EA4T steel. The microstructure and structure of the coating were analyzed using scanning electron microscopy, electron probe microanalyzer, and X-ray diffraction. The mechanical properties of the coating were tested using a microhardness tester, universal testing machine, and pendulum impact testing machine. The results show that the addition of rare earth elements makes the cladding layer more dense and more refined; at the same time, compared to the base material, the tensile strength of the repaired specimen increased by 12.9 %, the yield strength increased by 23.3 %, and the impact value increased by 43.6 %. [ABSTRACT FROM AUTHOR]

Uniform 3-D flower-like NiCo crystalline nano/microstructures were synthesized by a surfactant-assisted solvothermal process at 120 °C for 10–15 h, which were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED), energy dispersive X-ray spectroscopy (EDX) and vibrating sample magnetometry (VSM). The effects of synthetic parameters such as surfactant, solvent and molar ratio of metal ions on the formation and morphology of NiCo samples were investigated. The experimental results showed that sodium dodecylbenzenesulfonate (SDBS) and solvent ethanol play critical roles in the formation of novel flower-like NiCo alloy assemblies, and the self-assembly evolution was found to be a two-stage growth process. Magnetic hysteresis measurements revealed that the flower-like Ni48Co52alloy spheres with an average diameter of ca.800 nm and hierarchical flower-like Ni47Co53alloys with a size of ca.5 μm display ferromagnetic behaviors with saturation magnetizations of 111.33 emu g−1and 103.58 emu g−1, and coercivities of 84.27 Oe and 52.71 Oe, respectively, at room temperature. [ABSTRACT FROM AUTHOR]