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  • The high-temperature oxidation of tantalum carbide (TaC) powder was investigated to determine the application of refractory materials for space crafts. TaC powder with an average particle size of about 10 Jim was used in this experiment. The samples were oxidized in air at 573 to 1273K for 5 min to 25 h. The weight changes were measured to estimate the oxidation properties. Exposed for short oxidation times of 5 min, started at 873K, and weight changes increased with increasing oxidation tempera What is Tantalum Carbide?Tantalum Carbide (TaC) is a hard, brittle refractory ceramic with good electrical conductivity. It is an additive in high-temperature ceramics and aerospace industries for aircraft and rockets. It is odorless and brown-gray. Tantalum carbide is widely used as a sintering additive in ultra-high temperature ceramics or as a ceramic reinforcement in high-entropy alloys due to its excellent physical properties in melting point, thermal conductivity, thermal shock resistance, What is amorphous boron powder?Boron is well known as an advanced fuel in air-breathing propulsion systems due to its high gravimetric and volumetric heat value. This laboratory has developed a process at a pilot plant scale to prepare Amorphous Boron Powder (ABP) by the magnesiothermic reduction of B2O3 using the Self-propagating, High-temperature Synthesis (SHS) process. The crude boron produced (containing impurities such as B2O3, MgO, magnesium borides, magnesium corroborates, etc.) is crush The oxidation process of calcium hexaboride (CaB6) ceramic powder was investigated systematically in this paper. The CaB6 powder samples were heated continuously from room temperature to 1473 K at a heating rate of 10 K/min using differential scanning calorimetry (DSC). The oxidation tests were conducted at different exposure temperatures, and the phases and morphologies of the samples before and after exposure were analyzed using X-ray diffraction (XRD) and scanning electron microscopy (SEM). I What is calcium hexaboride?The oxidation process of calcium hexaboride (CaB6) ceramic powder was investigated systematically in this paper. The CaB6 powder samples were heated continuously from room temperature to 1473 K at a heating rate of 10 K/min using differential scanning calorimetry (DSC). The oxidation tests were conducted at different exposure temperatures, and the phases and morphologies of the samples before and after exposure were analyzed using X-ray diffraction (XRD) and scanning e What is the oxygen-containing functional groups' intrinsic formation and conversion path on GO? Several groups proposed that epoxy is the primary functional group, and the local strain induced by the oxygen-containing functional groups results in the cutting of graphene sheets. After exposure to water, acid catalyzes the hydrolysis of epoxide to form hydroxyl groups. Chen et al. proposed that epoxy and hydroxyl groups can be formed by directly attacking graphite sheets with •O• and HO• radicals. To fully understand the chemical structure of graphene oxide and the oxidation chemistry of sp2 carbon sites, we conducted a practical experiment and density functional theory combined study on the oxidation process of Graphite. The nuclear magnetic resonance, thermogravimetric analysis, and X-ray photoelectron spectroscopy results of unhydrolyzed oxidized Graphite indicate that the oxidation process involves the intercalating oxidation, where electrically neutral species is the oxidizing agent, Spark Plasma Sintering and Hot Isostatic Pressing were used to synthesize coarse-grained and fine-grained Ti3AlC2 specimens. Moreover, Spark Plasma Sintering processing parameters were modified to vary the TiC, Al2O3, and TixAly impurity and porosity in the fine-grained samples. The influence of the Ti3AlC2 microstructure on the oxidation resistance was assessed. It is demonstrated that the grain size can drastically modify the oxidation resistance. The higher density of grain boundaries in fine What is Ti3AlC2?Ti₃AlC₂ is MAX Phase-like structured and crystallizes in the hexagonal P6₃/mmc space group. There are two inequivalent Ti sites. Ti is bonded in a 3-coordinate geometry in the first Ti site to three equivalent Al and three equivalent C atoms. All Ti–Al bond lengths are 2.89 Å. Titanium carbide is used to prepare cermets, frequently used to machine steel materials at high cutting speeds. Ti 3 AlC 2 has the Ti 3 SiC 2 structure with lattice parameters of a=0.3075 nm and c=1.858 nm. Since iron has two valence states: +2 iron is called ferrous, +3 iron is called iron, so iron oxide is +3, and since oxygen is -2, according to the formula, the formula is Fe2O3. Iron oxide is the main component of rust. The leading cause of rust is that iron metal reacts with water and oxygen in the environment in the presence of carbon impurities, and iron metal rusts. For paint, ink, rubber, and other industries, it can be used as catalysts, glass, gems, and metal polishing agents and can be

High temperature oxidation of tantalum carbide powder

The high-temperature oxidation of tantalum carbide (TaC) powder was investigated to determine the application of refractory materials for space crafts. TaC powder with an average particle size of about 10 Jim was used in this experiment. The samples were oxidized in air at 573 to 1273K for 5 min to 25 h. The weight changes were measured to estimate the oxidation properties. Exposed for short oxidation times of 5 min, started at 873K, and weight changes increased with increasing oxidation tempera

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Can tantalum carbide melt

What is Tantalum Carbide?Tantalum Carbide (TaC) is a hard, brittle refractory ceramic with good electrical conductivity. It is an additive in high-temperature ceramics and aerospace industries for aircraft and rockets. It is odorless and brown-gray. Tantalum carbide is widely used as a sintering additive in ultra-high temperature ceramics or as a ceramic reinforcement in high-entropy alloys due to its excellent physical properties in melting point, thermal conductivity, thermal shock resistance,

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The Use of amorphous boron powder

What is amorphous boron powder?Boron is well known as an advanced fuel in air-breathing propulsion systems due to its high gravimetric and volumetric heat value. This laboratory has developed a process at a pilot plant scale to prepare Amorphous Boron Powder (ABP) by the magnesiothermic reduction of B2O3 using the Self-propagating, High-temperature Synthesis (SHS) process. The crude boron produced (containing impurities such as B2O3, MgO, magnesium borides, magnesium corroborates, etc.) is crush

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High temperature oxidation of calcium hexaboride

The oxidation process of calcium hexaboride (CaB6) ceramic powder was investigated systematically in this paper. The CaB6 powder samples were heated continuously from room temperature to 1473 K at a heating rate of 10 K/min using differential scanning calorimetry (DSC). The oxidation tests were conducted at different exposure temperatures, and the phases and morphologies of the samples before and after exposure were analyzed using X-ray diffraction (XRD) and scanning electron microscopy (SEM). I

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High temperature oxidation of calcium hexaboride powders

What is calcium hexaboride?The oxidation process of calcium hexaboride (CaB6) ceramic powder was investigated systematically in this paper. The CaB6 powder samples were heated continuously from room temperature to 1473 K at a heating rate of 10 K/min using differential scanning calorimetry (DSC). The oxidation tests were conducted at different exposure temperatures, and the phases and morphologies of the samples before and after exposure were analyzed using X-ray diffraction (XRD) and scanning e

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There are several unrevealed questions for the oxidation process of graphite

What is the oxygen-containing functional groups' intrinsic formation and conversion path on GO? Several groups proposed that epoxy is the primary functional group, and the local strain induced by the oxygen-containing functional groups results in the cutting of graphene sheets. After exposure to water, acid catalyzes the hydrolysis of epoxide to form hydroxyl groups. Chen et al. proposed that epoxy and hydroxyl groups can be formed by directly attacking graphite sheets with •O• and HO• radicals.

More>>

Revisiting the Oxidation of Graphite

To fully understand the chemical structure of graphene oxide and the oxidation chemistry of sp2 carbon sites, we conducted a practical experiment and density functional theory combined study on the oxidation process of Graphite. The nuclear magnetic resonance, thermogravimetric analysis, and X-ray photoelectron spectroscopy results of unhydrolyzed oxidized Graphite indicate that the oxidation process involves the intercalating oxidation, where electrically neutral species is the oxidizing agent,

More>>

Microstructure oxidation resistance relationship in Ti3AlC2 MAX Phase

Spark Plasma Sintering and Hot Isostatic Pressing were used to synthesize coarse-grained and fine-grained Ti3AlC2 specimens. Moreover, Spark Plasma Sintering processing parameters were modified to vary the TiC, Al2O3, and TixAly impurity and porosity in the fine-grained samples. The influence of the Ti3AlC2 microstructure on the oxidation resistance was assessed. It is demonstrated that the grain size can drastically modify the oxidation resistance. The higher density of grain boundaries in fine

More>>

Effect of Ti3AlC2 MAX Phase on Structure

What is Ti3AlC2?Ti₃AlC₂ is MAX Phase-like structured and crystallizes in the hexagonal P6₃/mmc space group. There are two inequivalent Ti sites. Ti is bonded in a 3-coordinate geometry in the first Ti site to three equivalent Al and three equivalent C atoms. All Ti–Al bond lengths are 2.89 Å. Titanium carbide is used to prepare cermets, frequently used to machine steel materials at high cutting speeds. Ti 3 AlC 2 has the Ti 3 SiC 2 structure with lattice parameters of a=0.3075 nm and c=1.858 nm.

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There are several oxidation reactions of iron

Since iron has two valence states: +2 iron is called ferrous, +3 iron is called iron, so iron oxide is +3, and since oxygen is -2, according to the formula, the formula is Fe2O3. Iron oxide is the main component of rust. The leading cause of rust is that iron metal reacts with water and oxygen in the environment in the presence of carbon impurities, and iron metal rusts. For paint, ink, rubber, and other industries, it can be used as catalysts, glass, gems, and metal polishing agents and can be

More>>

What should oxidation should be applied?

What is the color of oxidized paint? An inorganic chemical compound, oxydation, that is insoluble when water is used is known as oxidation. Its molecular composition is PR6O11 . It is composed of cubic fluorite and it is the most stable oxygenation at both room temperature and under normal pressure. Oxidation The chemical formula for oxidation is Pr6O11, which is a black powder. The oxidation of oxygen is insoluble when it comes to water. It can be dissolved in acid to make provide and ha

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What is Titanium Boride?

How do you define it? Titanium Boride ? Gray or gray-black titanium boride is powder with hexagonal crystal structures. It is very hard and has a melting point of 2980degC. Titanium dioxide has an air anti-oxidation temperature at 1000°C. This is also stable in HCl, HF acid and HCl. It is used primarily to make composite ceramic products. Due to its corrosion resistance, titanium diboride can be used in making molten molten crucibles or electrolytic cell electrodes. Titanium Borid

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According to statistics from China Chemical and Physical Power Supply Industry Association， China's export volume and export value of lithium-ion batteries have continued to increase. In 2021, China's exports of lithium-ion batteries were 3.428 billi

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3D printing materials steel technology breakthrough which can print any shape car parts without defects

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