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Selective Laser Sintering (SLS) is a powder-bed Additive Manufacturing process that has a large amount of potential for future growth. Historically SLS has been limited to a narrow selection of polymers, although there have been recent advances in working with composite powders, such as Alumide. One of the biggest limitations to developing new materials for sintering is the elevated risk involved...
Gd2O3:Er3+,Yb3+ microcrystals were prepared by the co-precipitation method using water or ethanol/water as solvents. The effects of solvents on particle size, morphology, and photoluminescence intensity were investigated. The microcrystal were systematically characterized by X-ray diffraction (XRD), thermogravimetry-differential scanning calorimetry (TG-DSC), scanning electron microscope (SEM), Fourier...
Highly pure (K, Na)NbO3 lead-free piezoelectric ceramic powders have been successfully synthesized by solvothermal treatment at 220°C for 10 h using distilled water, ethanol, glycol or isopropanol as the solvent. The powders were characterized using X-ray powder diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), differential scanning...
Pulverized mold residue of cured epoxy molding compound was reused to produce poly (vinyl chloride) composites with the aim to recycle resources in a more profitable and environmental concern way. The mold residue powder with functional groups on the surface was reactive to polar resins as the results of FT-IR spectrum (FT-IR). Mechanical tests, differential scanning calorimetry (DSC), vicat softening...
Epoxy polymers reinforced with a premixed epoxy/nano-silica masterbatch or dry non-surface-treated nano-silica and ground micro-silica flour were compared. Cured plates of epoxy containing both nano-particles (up to 15 %wt) and micro-particles (up to 51 %wt) of silica were produced and tested. The glass transition temperature, Tg, of the epoxy was measured using differential scanning calorimetry (DSC),...
Fine and ultra-fine powders are actively studied in a broad and interdisciplinary area of nanotechnology. This paper presents the complex of well-grounded solutions for direct production of nanopowders by the exploding wire method. The influence of initial conditions on the properties of powders is discussed. The basic factors are as follows: the level and the uniformity of heating, the heating rate,...
Clathrate Ba8Al16Si30 was produced by arc melting and hot-pressed and effects on the microstructure and thermoelectric properties were investigated. The ingot was crushed into powders in a glove box. The powders were hot-pressed at 1,073, 1,123 and 1,173K using a stress of 60 MPa for 2 hours. The phase transformation behavior of hot-pressed Ba8Al16Si30 was examined by thermo-gravimetric analysis (TGA),...
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