The nonlocalized electrode was made of an anode mixture of aluminum and iron granules with an addition of various amounts of tungsten carbide powder (TU 6-09-03-360-78) with purity 99.9% consisting of particles 1.1 ± 0.31 µm ().The granules were prepared in the form of cylinders 4 ± 1 mm in length and 4 ± 0.5 mm in diameter made of …

The precision machining of hard and ultra-hard materials by the laser beam is a key subject in the field of the modern manufacturing process.To improve the surface quality, the ablation threshold of a single pulse and the influence of the laser parameters on the surface characteristics of cemented tungsten carbide (WC-8Co) are firstly quantified …

Tungsten carbide is a dense, metallike substance, light gray with a bluish tinge, that decomposes, rather than melts, at 2,600° C (4,700° F). It is …

In the present study, we fabricated tungsten carbide (WC) coatings on tungsten using a recently proposed two-step interstitial carburization method and systematically investigated their mechanical behavior, including their responses to indentation, scratch, and wear.The coatings comprised WC and a very small amount of …

Three molybdenum alloy wires; Mo + 1.1 wt% hafnium carbide (MoHfC), Mo + 25 wt% W + 1.1 wt% hafnium carbide (MoI-IfC+25W) and Mo + 45 wt% W + 1.1 wt% hafnium carbide (MoHfC+45W), and a W + 0.4 wt% hafnium carbide (WHfC) tungsten alloy wire were evaluated. The tensile strength of all wires studied was found to have a positive strain …

In this study, the mechanical behaviour of the isolated tungsten carbide (WC) phase was investigated using single crystal micropillar compression. Micropillars in two crystal orientations, 1-5 μm in diameter, were fabricated using focused ion beam (FIB) machining and subsequently compressed between room temperature and 600 °C.

Tungsten carbide has been shown to be an effective catalyst for a number of reactions that are readily catalyzed by platinum, but not at all by tungsten, and it was …

Inelastic behavior of tungsten carbide at high pressures 1. Introduction. Tungsten carbide (WC) based ceramics are widely used due to their unique combination of extreme and... 2. PSPI experiments on WC. The experimental work used to calibrate and …

This paper aims to present the metallurgical and mechanical characterization of cryogenically treated tungsten carbide (WC–Co) in terms of α-, β-, γ-, and η-phase particles and wear behavior ...

Tungsten carbide has been shown to be an effective catalyst for a number of reactions that are readily catalyzed by platinum, but not at all by tungsten, and it was speculated that this behavior is due to changes in the electron distribution when carbon is added to tungsten. A test of this hypothesi …

Tungsten carbide catalyzes the formation of water from hydrogen and oxygen at room temperature, the reduction of tungsten xide by hydrogen in the presence of …

It was found that the deposition of tungsten carbide-cobalt (WC-12%Co) coating has increased the oxidation resistance, however, the coating was partially consumed after 875 h of corrosion. The corrosion rate for WC-12%Co coated SS 304 and SS 316 was calculated in terms of MPY (mils per year) and found to be 99.41 and 47.72 respectively …

Cast tungsten carbide is widely used to reinforce iron or steel substrate surface composites to meet the demands of harsh wear environments due to its extremely high hardness and excellent wettability with molten steel. Cast tungsten carbide particle/steel matrix surface composites have demonstrated great potential development …

The tungsten carbide powders (see Table 1) are analyzed in terms of structure and phase constitution by X-ray diffraction and microscopy. The results are summarized in Table 3. The X-ray ...

"Eect of tungsten carbide (WC) on electrochemical corrosion behavior, hardness, and microstructure of CrFeCoNi high entropy alloy" A. Hegazy Khallaf1*, M. Bhlol2, O. M. Dawood2, I. M. Ghayad3 ...

The aim of this study is to investigate the wear and corrosion behavior of tungsten carbide 10 wt.% nickel (WC-10Ni) and tungsten carbide 12 wt.% w cobalt (WC-12Co) coating deposited onto medium ...

Tungsten carbides are possible low-cost replacements for noble metal catalysts, but the role of different carbide stoichiometries (W 2 C, WC) and their polymorphs for catalytic behavior is poorly understood. We develop a "dynamic, isothermal" carburization of WO 3 in a mixture of CH 4 and H 2 to control phase composition and …

TiB 2 –TiC-based cermets are expected to replace cemented carbide in the cutting and finishing of ferrous alloys, steel, aluminum, copper, and other nonferrous metals owing to their excellent wear resistance and cutting performance. In this study, the tribological behaviors and wear mechanisms of TiB 2 –TiC-based cermets with different …

Tungsten carbide is an alloy of tungsten and carbon, made by heating tungsten powder with carbon and hydrogen at 1,400 - 1,600°C (2,550 - 2,900°F). The resulting alloy is 2-3 times as rigid as steel and …

In this work, our study showed that high pressure could inhibit abnormal grain growth and enhance the relative density of tungsten carbide. High hardness tungsten carbide obtained at high temperature and high pressure (highest hardness as 2925 kg·m − 2 at 1500 °C and 5 GPa holding 20 min). HPHT condition makes strong grain boundary …

The corrosion behavior of the tested samples in 3.5 wt.% NaCl solution was investigated using electrochemical polarization measurements. The microstructure of the sintered samples with high relative density showed three phases, which were FCC matrix, W-rich carbide, and Cr-rich carbide and homogeneously distributed all over the alloy …

Abstract. Tungsten carbide catalyzes the formation of water from hydrogen and oxygen at room temperature, the reduction of tungsten xide by hydrogen in the presence of …

Abstract In the present research paper, atomistic simulation at microscopic level has been performed for sintering of nanocrsytalline tungsten carbide particles. The …

The corrosion behavior of Ni-based chromium carbide coatings in a 0.5 mol/l HCl solution was studied by means of the potentiodynamic polarization curve, electrochemical impedance, and immersion ...

The tungsten carbide cobalt shows the maximum resistance to erosion. Alumina shows a moderate resistance to erosion. When the rotational speed is 750 rpm maximum erosion occurs. From the results it was observed that tungsten carbide cobalt coating offers excellent resistance to erosion. Table 2, Table 3, Table 4 shows the …

During the last few years, efforts have been made to improve the properties of tungsten carbides (WCs) by preparing composite materials. In this study, we prepared WC particles by mechanical alloying and investigated the effects of mechanical alloying conditions, such as mechanical alloying time and mechanically alloyed powder ratio, on …

Tungsten carbide-cobalt alloys (WC–Cos), which are used for cutting tools, are mainly composed of tungsten carbide and cobalt with minor elements including chromium, tantalum, nickel. Recycling WC–Cos requires a large amount of energy and chemicals for leaching tungsten. We previously showed that tungsten in WC–COs can …

Tungsten carbide is a very dense carbide containing equal parts of tungsten and carbon atoms. In its most basic form, tungsten carbide is a fine gray powder, but it can be pressed and formed for use in industrial …

Section snippets Material preparation. The tungsten carbide powder with a mean particle size of ∼22.2 µm and a mean grain size of ∼8.6 μm, Co powder with a mean particle size of ∼2.0 µm, WC-Co composite powder with a mean particle size of ∼100 nm, and pre-milled (activated) TaC powder with a mean particle size of 80 nm were used as …

Tungsten carbide has both industrial and military applications, from high strength end mill dies and geological drilling, to kinetic energy penetrators. In these extreme environments, an understanding of the dynamic fracture properties and the potential influence of grade microstructure is necessary. The present work investigates fracture …