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Hafnium Carbide For Sale

Tantalum 06/24/2020

hafnium carbide for sale

Hafnium Carbide For Sale

Buy Hafnium metal

Hafnium carbide (HfC) and tantalum hafnium carbide (Ta4HfC5) are very hard and mechanically enduring, the latter has more than 4000°C.

Hafnium metal and zirconium metal are two of the elements that are most similar to each other.

Therefore they are hard to separate.

The silvery, heavy hafnium metal so far is used only for a few special technical applications.

Hafnium carbide (HfC) and tantalum hafnium carbide (Ta4HfC5) are very hard and mechanically enduring, the latter has more than 4000°C the highest melting point of all materials.

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Pure element 72 samples of the periodic table.

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hafnium carbide hfc

The nanoscale resistive switching in the hafnium oxide stack is investigated by the conductive atomic force microscopy (C-AFM).

The initial oxide stack is insulating and electrical stress from the C-AFM tip induces nanometric conductive filaments.

Multimode resistive switching can be observed in consecutive operation cycles at one spot.

The different modes are interpreted in the framework of a low defect quantum point contact theory.

The model implies that the optimization of the conductive filament active region is crucial for the future application of nanoscale resistive switching devices.

NASA Astrophysics Data System (ADS)

High frequency, ground-based, in situ measurements from eleven globally-distributed sites covering 1994-2014, combined with measurements of archived air samples dating from 1978 onward and atmospheric transport models, have been used to estimate the growth of 1,1-difluoroethane (HFC-152a, CH3CHF2) mole fractions in the atmosphere and the global emissions required to derive the observed growth.

HFC-152a is a significant greenhouse gas but since it does not contain chlorine or bromine, HFC-152a makes no direct contribution to the destruction of stratospheric ozone and is therefore used as a substitute for the ozone-depleting chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs).

HFC-152a has exhibited substantial atmospheric growth since the first measurements reaching a maximum annualized global growth rate of 0.81 ± 0.05 ppt yr-1 in 2006, implying a substantial increase in emissions up to 2006.

However, since 2007, the annualized rate of growth has slowed to 0.38 ± 0.04 ppt yr-1 in 2010 with a further decline to an average rate of change in 2013-2014 of -0.06 ± 0.05 ppt yr-1.

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The average Northern Hemisphere (NH) mixing ratio in 1994 was 1.2 ppt rising to a mixing ratio of 10.2 ppt in December 2014.

Average annual mixing ratios in the Southern Hemisphere (SH) in 1994 and 2014 were 0.34 and 4.4 ppt, respectively.

We estimate global emissions of HFC-152a have risen from 7.3 ± 5.6 Gg yr-1 in 1994 to a maximum of 54.4 ± 17.1 Gg yr-1 in 2011, declining to 52.5 ± 20.1 Gg yr-1 in 2014 or 7.2 ± 2.8 Tg-CO2 eq yr-1.

Analysis of mixing ratio enhancements above regional background atmospheric levels suggests substantial emissions from North America, Asia, and Europe.

Global HFC emissions (so-called "bottom-up" emissions) reported by the United Nations Framework Convention on Climate Change (UNFCCC) are based on cumulative national emission data reported to the UNFCCC, which in turn are based on national consumption data.

There appears to be a significant

NASA Astrophysics Data System (ADS)

High frequency, in situ observations from 11 globally distributed sites for the period 1994-2014, and archived air measurements dating from 1978 onward have been used to determine the global growth rate of 1,1-difluoroethane (HFC-152a, CH3CHF2).

These observations have been combined with a range of atmospheric transport models to derive global emission estimates in a top-down approach.

HFC-152a is a greenhouse gas with a short atmospheric lifetime of about 1.5 years.

Since it does not contain chlorine or bromine, HFC-152a makes no direct contribution to the destruction of stratospheric ozone and is therefore used as a substitute for the ozone-depleting chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs).

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The concentration of HFC-152a has

Hafnium Carbide Powder at Rs 7000/pack | Carbide Powder

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Nanomaterials innovation has the potential to address a number of today’s biggest scientific challenges, ranging from the need for more efficient alternative energy technologies, faster and flexible electronics, and improved disease diagnosis and treatment.

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Hafnium Carbide Powder HfC Advanced Composites Material

1, hafnium carbide as an additive added to the solid rocket engine throat lining material

Carbon-carbon composites are the preferred materials for throat linings for solid rocket motors due to their superior high temperature thermal and mechanical properties over other materials.

During engine operation, the carbon-carbon composite throat lining is destroyed under severe thermal environment and the inner profile is ablated by heat flux scouring with high temperature, high pressure, high velocity, and containing corrosive particles.

The throat diameter is enlarged, Rough surface roughness, irregular shape, etc., thus affecting the working pressure of the engine, resulting in lower nozzle efficiency.

The anti-ablation performance of HfC-C-C composites can be greatly improved by adding 8% -10% HfC produced by our company to the hose liner of a certain type of weapon system.

HfC contributes to the ablation resistance of the throat lining of HfC-C-C composites.

There are two main aspects: First, HfC preferentially reacts with oxygen during high-temperature ablation to form HfO2 at an ablation temperature of 3500 ° C, effectively preventing the oxidation caused by oxygen atmosphere reacting on the composite carbon matrix and carbon fiber ;

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Second, due to high strength and hardness, HfC effectively improves the overall mechanical resistance to abrasion, erosion performance, greatly inhibiting the mechanical erosion caused by the fuel on the lining of the throat.

Obviously, the ablation resistance of HfC-C-C composites increases with the increase of HfC content.

The experimental results show that when the content of HfC reaches 8% -10%, the line ablation rate of HfC-C-C composites will appear approximately constant stable, in solid rocket engine test conditions, HfC-C-C composite throat lining has good anti-erosion properties.

1 atomic hafnium carbide and 4 atomic tantalum carbide, consisting of tantalum hafnium duplex carbide 4TaC · HfC, by using laser extreme heating technology to test 4TaC · HfC heat resistance, the melting point reached 3905 degrees Celsius.

Is a compound material known to have the highest melting point?

It is a very good refractory ceramic material.

Some of our U.S.customers are applying thermal protection systems to high-speed aircraft.

They are extremely heat-resistant, able to withstand and withstand extremely harsh High-temperature environment, but also as a nuclear reactor overheated fuel cladding.

The heat caused by air friction, including when traveling at supersonic speeds over Mach 5, will produce very high temperatures.

As 4TaC · HfC materials withstand and withstand extremely harsh high-temperature environments, paving the way for the next generation of supersonic aircraft, this material means the new spacecraft may be faster than ever before.

4TaC · HfC materials are used in the field of supersonic aircraft, aircraft nose, the outer edge of the parts subjected to the greatest friction during the flight, and so on, making it possible to fly manned aircraft traveling at Mach 5.

3.Hafnium carbide is an important functional material for making control rods and protective devices of nuclear reactors.

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It is an important material for the atomic energy industry and can be used as a rocket propulsion device.

It is especially suitable for the field of throat materials of rocket nozzles and rocket lances and rocket nose cone parts for rocket returning to the atmosphere.

Hafnium-containing alloys can be used as rocket nozzles and aircraft frontier protection layers for returning to the atmosphere.

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Hafnium carbide powder (HfC) is a chemical compound of hafnium and carbon.

With a melting point of about 3900 °C, it is one of the most refractory binary compounds known.

Hafnium carbide powder is a very hard material.

It is used in hard coatings.

It is also used as rocket nozzle throat material and in metal-ceramic materials.

It has low oxidation resistance, with the oxidation starting at temperatures as low as 430 °C.

Hafnium carbide powder is ductile and has a brilliant silver luster.

Purity 99.95 Niobium And Tantalum

The metal has a close-packed hexagonal crystal structure.

It exhibits excellent mechanical properties and has extremely good corrosion resistance.

The electronics industry uses a hafnium-based compound that can be employed in gate insulators in the 45 nm generation of integrated circuits.

Hafnium carbide-based compounds are practical high dielectrics, allowing reduction of the gate leakage current which improves performance at such scales.

Also, Due to its heat resistance and its affinity to oxygen and nitrogen, hafnium is a good scavenger for oxygen and nitrogen in gas-filled and incandescent lamps.

Hafnium is also used as the electrode in plasma cutting because of its ability to shed electrons into air.

Hafnium carbide is the most refractory binary compound known to man.

Similarly, hafnium nitride (HfN) is the most refractory nitride known with a melting point of approximately 3305 °C.

Hafnium carbide powder is used in hard coatings, often applied by processes such as plasma spraying.

Dr. Hans Roelofs, Ph.D. (National Technical University of Athens, Greece)

Hafnium carbide powder (HfC) is one example of advanced ceramic fiber matrices.

It is a compound with the highest known melting temperature: 3890C.

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In theory, a part made with Hafnium Carbide fiber-matrix composite would survive temperatures that would soften or melt even refractory metal-metal alloys such as rhenium-tungsten blends.

HfC has about 60 percent the density of metal alloys, so critical rocket, missile and aerospace components made with HfC composites would be correspondingly lighter.

Hafnium Carbide Powder

We produce and supply customizable hafnium carbide (HfC) powders. Learn more about its properties and applications here!

Specific Heat‎: ‎0.20 J/g K

Hardness‎: ‎2300 kg/mm

Electrical Resistivity‎: ‎37-45 μΩ cm

HAFNIUM CARBIDE price

Hafnium carbide (HfC) is a chemical compound of hafnium and carbon, which is one of the most refractory binary compounds known to man with a melting point of approximately 3900 ℃.

Hafnium carbide powder is obtained by the reduction of hafnium oxide with carbon at 1800 to 2000℃, in which long processing time is required to remove all oxygen.

It possesses the highest melting point of any known binary alloy, because of which it has a variety of high-temperature applications.

It is considered candidates for extremely high-temperature applications such as rocket nozzles and scramjet components.

Hafnium carbide can also be used in hard coatings, often applied by processes such as plasma spraying.

Besides, HfC structural foams can be fabricated into high-temperature components or used as a thermal insulation material.

It is also be used in the ceramic industry.

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