This reference work provides a complete review of the structure properties, processing and applications of refractory carbides and nitrides. The contents include: the refractory carbides; interstitial carbides, structure and composites; titanium, zirconium, and hafnium carbides; vanadium, niobium and tantalum carbides; chromium, molybdenum, and tungsten …Web

In Union Carbide, VC is produced using a vacuum furnace with V 2 O 3, iron powder, and carbon powder as raw materials, which is heated to 1350°C, and kept at this temperature for 60 h under vacuum. South Africa's Vametco mineral company is a subsidiary of Strategic Minerals, United States (STRATCOR), which specializes in the …Web

Vanadium carbide (VC) as excellent ceramic and functional material is usually prepared by carbothermal reduction of V 2 O 5 which must be extracted from a typical V slag by complex processes. Pollutants, such as ammonia-nitrogen wastewater, NH 3 and CO 2 are inevitably discharged. A novel and green method for VC preparation was …Web

To produce the vanadium carbide, vanadium(III) oxide is reduced by means of carbon nanofiber in an induction furnace with an argon atmosphere. The …Web

The synthesis of fine vanadium-carbide (VC0.88) powder is considered. To produce the vanadium carbide, vanadium(III) oxide is reduced by means of carbon nanofiber in an induction furnace with an argon atmosphere. The carbon nanofiber is produced by the catalytic decomposition of light hydrocarbons. The specific surface of …Web

carbide can be used as a catalyst in the production of carbon monoxide, methanol CH 3 OH and methane [19, 20]. Application of Vanadium Carbide VC 0.88 Vanadium …Web

Vanadium carbide (V 8 C 7) nanopowders have been successfully synthesized by thermal processing the precursor of ammonium vanadate (NH 4 VO 3) and nanometer carbon black.The single phase V 8 C 7 powders can be prepared at ∼ 1100 °C for 1 h with the average crystallite size of 32.6 nm. The powders show good dispersion …Web

Vanadium carbide powders are a type of chemical compound that contain vanadium (V) and carbon ©. These powders are widely used in various industrial applications, including the production of…Web

In fact with powder metallurgy production, vanadium carbides are usually smaller than the common chromium carbides or molybdenum/tungsten carbides since they are more stable and coarsen more slowly. Crucible Steel metallurgists took advantage of this fact with the development of CPM-10V which had high amounts of vanadium …Web

Furthermore, the volume fraction of vanadium carbide precipitates is less than niobium carbide precipitates due to the fact that the solubility of V is approximately an order of magnitude greater than that of Nb in the temperature of 760–840 °C. ... C. Lebeau, Production and control of HSLA steel castings. AFS Trans. 92, 645 (1984)Web

Vanadium carbide (V 2 CT x) MXene was successfully used as a sensor for the sensing of nonpolar gases [156]. The developed sensor has shown high ability to detect both gases methane and hydrogen with detection limits of 25 and 2 ppm, respectively. ... The first two mentioned production methods are capable of depositing …Web

Production of vanadium metal from vanadium oxide by carbon reduction is achieved above 1700°C, where some stable vanadium carbide (VC or VC 2) can be produced. The stability of CO is higher than that of vanadium oxide, which is reduced in the following sequence during carbon thermal reduction: V 2 O 5, V 2 O 4, V 2 O 3, VO, …Web

A novel strategy for the preparation of metallic vanadium from V 2 CO solid solution as consumable anode is proposed by molten salt electrolysis. Controllable synthesis of V 2 CO solid solution was confirmed based on thermodynamic analysis and carbothermal reduction of V 2 O 3.The constant-current electrolysis process of V 2 CO was divided into …Web

Taking the V-C binary system as an example, here we report the first-principles prediction of a new type of vanadium carbide, V 5 C 3, which has an …Web

The mechanical properties of the metal ceramic were increased by the addition of superfine niobium carbide (NbC) and vanadium carbide (VC), and their optimum values were a flexural strength of ...Web

Anhydrous borax powder (Na 2 B 4 O 7) as molten bath salt, vanadium oxide powder (V 2 O 5 ⩾99%) and chromium oxide powder (Cr 2 O 3 ⩾99%) as supplier of carbide forming elements in oxide baths, aluminum powder (Al⩾99%) as reducing agent and pure sodium fluoride powder (NaF) as fluidizing agent were used for different baths …Web

2.2 Vanadium Carbide. The vanadium carbide with stoichiometric composition (VC) cannot be obtained under equilibrium conditions. It usually has extensive homology disordered δ-VC 1-x (VC 0.65-VC 0.90) crystallizes with a NaCl cubic structure.Carbon atoms in NaCl-type vanadium carbides can only fill the octahedral …Web

Developing highly active and stable cocatalysts at lower costs is greatly crucial for high-performance semiconductor-based photocatalytic H 2 evolution from water splitting. Herein, we report that noble-metal-free metallic vanadium carbide (VC) can function as a superior cocatalyst when integrated with CdS for efficient photocatalytic H 2 …Web

However, the production of reinforced MMCs through various casting technologies has two major shortcomings. First, the segregation of reinforcement particulates in the iron matrix is likely to be uneven because of the density difference between the matrix and the reinforcement. ... Vanadium carbide (VC) with the …Web

Vanadium carbide powders have diverse applications in various industries. In the metallurgical sector, they are widely used as an alloying element in the production of high-speed tools, wear ...Web

Vanadium carbide is known, for its hardness and other unique properties, as a refractory material. The synthesis of vanadium carbide is always associated with the utilization of expensive active ...Web

Vanadium carbide MXenes, specifically V 2 CT x, have shown promise for applications ranging from energy storage and sensing to electronics and optics. In the …Web

Vanadium carbide MXenes, specifically V 2 CT x, have shown promise for applications ranging from energy storage and sensing to electronics and optics.In the past decade, however, research involving V 2 CT x has been mostly limited to its multilayered form due to instability of delaminated V 2 CT x in its colloidal state. In this paper, we …Web

Introduction The transition metal carbides have very high melting points, hardness and high temperature strength. These materials also exhibit good electrical and …Web

Developing highly active and stable cocatalysts at lower costs is greatly crucial for high-performance semiconductor-based photocatalytic H 2 evolution from water splitting. Herein, we report that noble-metal-free metallic vanadium carbide (VC) can function as a superior cocatalyst when integrated with CdS for efficient photocatalytic H 2 …Web

The resultant vanadium carbide possesses abundant periodic carbon vacancies (12.5 at.%) and mesoporous structure, which not only provide coordinatively unsaturated sites to adsorb and activate N 2 molecule through π-back-donation process, thus promoting the catalyzing of N 2 to NH 3, but also facilitate the fast mass transfer …Web

Cocatalyst loading is an efficient strategy to accelerate the hydrogen evolution reaction, which is the final crucial process to complete photocatalytic hydrogen production and realize solar-to-hydrogen conversion. Herein, we report that N-doped vanadium carbide (NVC) is combined with Pt to form a multifunctional cocatalyst capable of enhancing …Web

Vanadium carbides have attracted much attention as highly active catalysts in both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), …Web

A multilayered ternary carbide (MAX powder, here, M 3 AC 2) was mixed with an acidic solution of HF (for example, HCl-LiF) to produce multilayered M 3 C 2 T x MXenes.Web