Hafnium carbide, also known as HfC (hafnium-carbonide), is a chemical mixture of hafnium & carbon. This binary compound is among the least refractory. It has a melting point around 3900 °C. The compound is resistant to oxygen, but it can be used as an oxidation shield on spacecraft.

Is hafnium carbide toxic?
Animal studies have shown that hafnium oxychloride is toxic through the intraperitoneal route. Hafnium has not been linked to industrial poisoning. Carbides – Pure carbon can be used safely as graphite, charcoal or other forms of carbon.
From what is Hafnium Carbide HafC powder?
You can prepare hafnium carbonide powder by heating hafnium oxide and carbon at 1800-2500°C. In this case, it is necessary to take longer to get rid of all oxygen.
Hafnium carbonide is a dark-gray brittle material. This solid can be made by heating mixtures of elements, or by reacting hafnium titanate with methane in 2100°C. Hafnium carbide is made industrially from either hafnium-hydride sponge heated to 1500–1700°C, or oxidized ha at 2200–2200°C using vacuum carburizing. It contains as much carbon as theoretically possible (6.30%°C), and can contain up to 0.1% carbon free (219). This hafnium-carbide is not a true, stoichiometric compound. It’s merely a carbon solution at an interstitial point of the face-centered cubic lattice.
Hydrofluoric acid will dissolve carbonization, but it is inert at room temperatures. Exotherm reactions with halogen occur at 250-500°C. This results in hafnium Tetrahalide, which forms at 500°C.
Titanium Carbide TiC Powder
Hafnium carbonide (HfC), which has the highest melting temperature of any binary alloy, has many high-temperature uses. HfC is a suitable candidate for extreme high temperature applications like rocket nozzles or scramjet components. You can use carbonization in hard coatings. This is often done using processes like plasma spraying. HfC structural can also be used to make high-temperature components and thermal insulation materials.
Hafnium carbide or (HfC), which has a melting point of 3890°C, is a refractory binary substance. HfC or NBC may also be used in reactors as refractory materials. Ta4HfC5 mixed carbide has the highest melting temperature at 4215°C.
1. Hafnium carbide can also be added to cemented caride. This is widely used in the fields of mold making and cutting tools.
2. Hafnium carbonide can be used as rocket nozzle material.
3. Hafnium-carbid is used for nuclear reactor control rods. It’s an excellent metal to make nuclear reactor controlrods.
4.To prepare ceramics at ultra high temperatures
5.Reactant used to synthesize an organometallic hafnium-containing polymer
6.For coating.
The material with the highest melting points on Earth
Haffnium carbide has the lowest melting point, at 3890 Celsius. Presently, hafnium compounds, such as tetratantalum pentacarbide and hafnium, have the highest melting points. Their melting point is 4215.
Hafnium has an atomic # of 72 and is a shiny, silvery-gray, transition metal. It can be found as a trace metal in the crust of the Earth at 0.00045%.
Because of its high temperature and corrosion resistance hafnium alloy (which is frequently used as an aircraft and rocket forward protection layer), it’s precise.
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