Nanocrystalline niobium carbide (NbC) ceramics and carbide-niobium nitride (NbC/NbN) composites were synthesized at low temperatures without high-pressure sintering using a single-step polymer-derived approach from meltable pre-ceramic blend. Niobium hydride (NbH5) 1,2,4,5-tetrakis(phenylethynyl)benzene (TPEB) reacted 1500 °C under argon or nitrogen in tube furnace to form NbC NbC/NbN with high...

Rare earth elements and transition are widely used in aluminum alloys, magnesium alloys copper due to their unique microalloying effects. With regard in-depth research on the grain refinement characteristics of rare elements, combination master has a great impact theories technical refinement, broadening application field alloys. This paper first summarizes mechanisms analyzes effects suitable ...

Abstract: mechanical properties of AISIH 13 hot-work tool steel have been studied. Cast samples made of the modified new steel were homogenized and austenitized at different conditions, followed by tempering at the specified temperature ranges. Hardness, red hardness, three point bending test and Charpy impact test were carried out to evaluate the mechanical properties together with characteriz...

We report electrical measurements of ' a sandwich structure consisting of a niobium electrode in contact with a thin lightly doped n type InGaAs layer. The bottom of the sandwich is a degenerate layer of n-type InGaAs used to collect the current. The semiconductor layers are grown by molecular beam epitaxy (MBB). These three layers are the essence of the proposed superconducting-base, semicondu...

Industrial fusion of microalloying elements in steelmaking is imperative defining and optimizing certain steel properties due to their strengthening significant grain refinements effects at minute quantities. Copper, vanadium, columbium are explored this investigation monitor respective dissolution processes a ladle metallurgy furnace (LMF), with concise parametric studies on number plugs varia...

The processes of creating a superconducting niobium coating on cryogyroscope rotor were considered. conditions for the electrodeposition coatings from molten salt rotors cryogenic gyroscope determined. Niobium obtained electrochemically polished and subsequently protective pentoxide was electroformed. occurring during electrodeposition, electropolishing electrooxidation equipment technology dev...

In this study, different samples of Niobium and Vanadium co-doped titania  thin films (5-10-15 mol% Nb and 5-10-15 mol% V) were prepared via sol−gel dip coating method, using niobium chloride as niobium precursor, ammonium metavanadate as vanadium precursor, and titanium (IV) butoxide (TBT) as titanium precursor. The effects of doping amount on the structural, optical, and photo-catalytic prope...