A new series of neodymium doped barium bismuth fluoroborate glasses with the chemical composition of (70-x)H3BO3 + 5Bi2O3 + 10BaCO3 + 7.5CaF2 + 7.5ZnO + xNd2O3 (where x = 0.05, 0.1, 0.25, 0.5, 1, 2 (in wt.%) have been prepared by the conventional melt quenching method. The powder X-ray diffracti...

The influences of diantimony trioxide (Sb2O3) on the laser-marking properties of thermoplastic polyurethane (TPU) are studied. The TPU/Sb2O3 composites are prepared by melt blending in a HAAKE mixer. A neodymium-doped yttrium aluminum garnet (Nd:YAG) pulsed laser beam of a wavelength of 1064 nm ...

This paper presents the results of a combined experimental and theoretical study of fracture toughness and fatigue crack growth in cast Nb-15Al-xTi (x=10, 25 and 40 at%) niobium aluminide-based intermetallics. Fracture toughness and fatigue crack growth resistance are shown to improve significan...

Niobium aluminides for structural applications to operate beyond the operating temperatures of conventional nickel-base superalloys have been assessed over the past few years. The niobium aluminides have extremely high strength at elevated temperatures, above 1000°C. Brittleness at ambient temp...

We compare aluminide and alumino-silicide composite coatings on niobium using halide activated pack cementation (HAPC) technique for improving its oxidation resistance. The coated samples are characterized by SEM, EDS, EPMA and hardness measurements. We observe formation of NbAl3 in aluminide co...

Titanium aluminides are excellent materials for light-weight applications at high temperatures. To enhance their creep strength, various alloying elements are added. In this work the effect of 5 at% Niobium (Nb), Tantalum (Ta) and Zirconium (Zr) on the creep properties of ternary Ti-44Al-5X (X =...

Niobium aluminide-based composites reinforced with in situ and externally added Al2O3 and TiC particulates were fabricated by hot-pressed sintering at 1400 °C. In particular, Nb2Al–Al2O3–TiC in situ composites were successfully obtained from the raw powder mixtures of Nb60Al40 (in at.%)–TiO2...

Niobium aluminides were produced by the direct reduction of mixtures of niobium and aluminium oxides. Pellets of the mixed oxides were made the cathode in molten CaCl2 or a CaCl2–XCl melt, where X was either Na or Li. The oxygen in the pellets ionised, dissolved in the melt, and was discharged ...

Aluminium matrix composites reinforced with molybdenum aluminide nanoparticles were synthesized by ball milling and reactive sintering of the mixture of aluminium and 10 wt% hydrated molybdenum oxide powders. Sintering the as milled powder in air below 750 °C produced MoAl12 intermetallic compo...

The hydrolysis behaviour of magnides and aluminides and the thermodynamic analysis of the hydrolysis have been systematically investigated. Two compounds in the Mg–Ni binary system (Mg2Ni and MgNi2) both exhibit hydrolysis behaviour at room temperature. Ni nanoparticles are the product of the h...

Lithium aluminate, (LiAlO2)-based porous ceramic membrane (PCM) was prepared with poly(vinylidene fluoride-hexafluoropropylene) as binder. Physical properties such as thermal stability, porosity and tortuosity of the pores were measured. Effective ionic conductivity and compatibility with lithiu...

Tritium (3H) must be replenished for strategic stockpile and fusion reactors. 6Li-enriched γ-LiAlO2 pellets have been used for 3H production by thermal neutron irradiation. A fundamental study of 3H and 6Li diffusion processes in irradiated γ-LiAlO2 pellets is needed to assess and predict the ...

Activity of β-lanthanum were determined in gallium and gallium-aluminum alloy (12 mol. % Al) at 573–1081 K and 573–999 K, respectively, using the electromotive force measurements method. Partial molar thermodynamic functions of lanthanum in the said alloys were calculated. Solubility of lanth...

Titanium isotopic compositions (mass-dependent fractionation and isotopic anomalies) were measured in 46 calcium-, aluminum-rich inclusions (CAIs) from the Allende CV chondrite. After internal normalization to 49Ti/47Ti, we found that ε50Ti values are somewhat variable among CAIs, and that ε46...

Thin-film electroluminescent devices containing Ca0.6Sr0.4TiO3:Pr, Al-doped Ca0.6Sr0.4TiO3:Pr, or La-doped Ca0.6Sr0.4TiO3:Pr phosphors were prepared by a conventional sol–gel and firing method. Doping by Al improved the performance of the device markedly, in that its current-starting voltage an...

Aluminum and lanthanum binary oxyhydroxides on chitosan template ([email protected]) was synthesized by greener in-situ one-pot method for defluoridation of drinking water. Characterization by FTIR, XPS, TGA/DSC and SEM with EDAX revealed that the material was a composite of chitosan and aluminu...

In the leaching solution of high-sulfur bauxite roasted by sulfuric acid, a high concentration of aluminum presented along with titanium and iron. The present work was to remove Ti(IV) from the leach liquor by calcium alginate microsphere sorbent material (CA-P204) based on natural alginate impr...

Chlorine dioxide, the so-called “ideal biocide”, can be successfully applied as an antiseptic agent based on its rapid and safe antimicrobial property. One of the significant limitations of its topical or oral use is that the chlorine dioxide residence time in aqueous solution is very short du...

The influence of temperature and carbonation duration time on the phase, morphology, particle size and purity of aluminum hydroxide produced by carbonation of aluminate solution obtained from sintered nepheline syenite leaching have been studied. Carbonation experiments were carried out at diffe...

Hydrophilic coatings have received considerable attentions in recent years. This study investigates an ATO/potassium silicate hydrophilic film based on antimony doped tin oxide (ATO) and potassium silicate (PS) which deposited on aluminum sheets by twice spray pyrolysis. For comparison, four gro...