In order to improve the mechanical properties and oxidation resistance of three-dimensional carbon fiber-reinforced silicon carbide composites prepared by Low-pressure chemical vapor infiltration (LCVI), electrodeposition chromium combined with silicon melt infiltration method (CSI) is developed...

A detailed investigation of the compositional, optical and electrical properties of a chromium silicide layer grown at room temperature on top of doped amorphous silicon films is presented. The formation of the layer is promoted only when phosphorous atoms are present in the film. The deposition...

In this paper we present a device, based on amorphous silicon technology, fabricated on ceramic substrate able to perform pressure measurement with both good linearity and sensitivity. The active material of the sensor is a thin film (below 5 nm) of chromium silicide formed at room temperature o...

Chromium silicide (Cr3Si) nanorods were successfully synthesized using anhydrous chromium trichloride and silicon tetrachloride as starting materials via a co-reduction route at 600 °C in an autoclave. X-ray powder diffraction pattern indicated that the product was cubic Cr3Si (a=4.555 Å). Tran...

A chromium silicide–chromium carbide (Cr3Si–Cr7C3) outer layer mainly composed of Cr3Si, Cr7C3, and a small amount of Cr3C2 was prepared on a SiC coated carbon fiber reinforced silicon carbide (C/SiC) composite using a Powder Immersion Reaction Assisted Coating (PIRAC) method. The Cr3Si–Cr7C3...

This project investigated the influence of IR-laser irradiation (λ = 1064 nm, P = 240 mW) on composite ceramics SiC–chromium silicides (CrSi2, CrSi, Cr5Si3) by methods of X-ray diffraction, electron microscopy, atomic force microscopy, and X-ray microanalysis. Samples were irradiated in air. I...

Transition metal silicide nanowires exhibit low resistivity, great thermal stability and excellent mechanical strength, contributing to their applications as interconnection and contact materials for future integrated circuits devices. In this work, we successfully fabricated two kinds of chromi...

The chromium silicide-based electroconductive composites were fabricated by solid-state sintering of chromium silicide and chromium oxide powders at 1370 °C in argon. The final densified composites were composed of various solid solution and silicide phases (e.g. Cr3Si, Cr5Si3) and silica, depe...

The energetic stability and oxidation behaviour of quaternary chromium silicides mainly depends on their chromium content. In this work, the pseudolamellar crystal structures of six representatives of the X3T2(T1-xCrx)2Si6 compounds (X = Nb or Ti and T = Fe, Co or Ni) are determined by resonant ...

A new type hexagonal nanoflowers of Tin(IV) Sulfide/Graphene Oxide was synthesized by hydrothermal method. The Tin(IV) sulfide is uniformly deposited on the surface of the graphene oxide and that as-prepared Tin(IV) Sulfide/Graphene Oxide photocatalyst showed strong absorption in the visible lig...

The selective leaching of copper from the spent Cu-Cr catalyst was carried out with H2SO4. The effect of different parameters such as acid concentration, pulp density, temperature and particle size on leaching was investigated. The maximum extraction of copper and chromium was 67.25 and 2.3%, re...

Here we propose an innovative photocatalytic hybrid system for the reduction of hexavalent chromium (Cr(VI)) from aqueous solutions. The hybrid system was composed of titanium dioxide (TiO2) immobilized in the micro-voids of asymmetric alumina hollow fibers and of the green algae Chlorella vulga...

SmCo permanent magnets are used in the automotive and aircraft industries. They are preferable over NdFeB magnets for applications above 150 °C. End-of-life SmCo magnets are a valuable secondary source of cobalt and samarium. This study presents solvent extraction systems without addition of mo...

Cobalt–samarium alloys are generally used for producing magnets. Samarium falls under the class of rare earth elements, which are precious and expensive, because of which they are often recovered by recycling processes to save cost. There are a few reported processes for the recycling of rare e...

Cobalt nanoparticles (CoNPs) have been widely used in industry given their physical, chemical and magnetic properties; however, CoNPs may cause neurological symptoms and diseases in human, yet their mechanisms of toxicity remain unknown. Here, we used male Wistar rats to investigate differences ...

Development of high-performance electrocatalysts for oxygen evolution reaction (OER) is the key to improve the efficiency of many energy conversion process. Metal telluride is a type of low-cost OER catalyst with promising activity. To improve the OER performance of metal telluride, we propose h...

Tellurides have been identified in VMS mineralization at Yuinmery and Austin in the Archean Youanmi Terrane, Yilgarn Craton, Western Australia. Tellurides identified at Yuinmery include: petzite, stützite, hessite, tellurobismuthite, altaite, rucklidgeite, melonite, mattagamite and a nickel-cob...

The work describes the process of electrochemical synthesis of cobalt selenide from aqueous solutions. The mechanism of co-deposition of selenium with cobalt was examined with the method of the cyclic voltammetry and rotating disk electrode. The tests were conducted in acid solutions of pH = 2 a...

In water splitting, oxygen evolution reaction (OER) requires most active and stable electrocatalysts to overcome their sluggish kinetics thereby improving the device efficiency. In this research work, we developed nanocarbon protected cobalt sulfide, selenide and telluride (core-shell Co9S8@NC, ...

The significant increase in the CO2 levels as a result of combustion of hydrocarbons fuels resulted in global warming. The use of solar base technology may decrease CO2 concentration but at the same time can be helpful in meeting energy demands. Moreover, most of the photocatalysts work in ultra...