Why Hafnium Carbide Can Form Solid Solution with Many Compounds?
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Author : Lzh
Update time : 2022-12-18 19:53:07
What is Hafnium Carbide? Hafnium carbide is a gray solid which needs to be sealed at room temperature, cool, ventilated, and dry. Hafnium carbide can form a solid solution with many compounds (such as ZrC, TaC, etc.) For example, the microstructure of the composite carbide with HfC-4TaC as its component shows two phases: one phase is the eutectic of hafnium carbide tantalum carbide; The other phase is needle-like free graphite phase with a shape ratio of 50:1 This "near eutectic" hafnium carbide (HfC) product has good thermal stability and high melting point. It can be used as the throat material of a rocket nozzle. Hafnium carbide powder is usually synthesized from hafnium dioxide (HfO2) and carbon in an inert or reducing atmosphere. The reaction temperature is 1900~2300 ℃. Hafnium carbide can form a solid solution with many compounds (such as ZrC, TaC, etc.).
Introduction to Hafnium In nature, hafnium often coexists with zirconium. Zirconium-bearing minerals all contain hafnium. Hafnium and zirconium are similar. Beryllium zircon in stone can contain up to 15% HfO2. There is also a metamorphic zircon, which contains more than 5% HfO2. The latter two minerals have few reserves and have not been used in industry. Hafnium is mainly recovered during the production of zirconium. When sponge hafnium is taken out of the crucible, special care should be taken to avoid spontaneous combustion. Large sponge hafnium should be broken into small pieces of a certain size, To press into consumable electrodes, and then melted and cast into an ingot. Sponge hafnium should also be prevented from spontaneous combustion during crushing. The further purification of sponge hafnium is the same as titanium and zirconium by the iodide thermal decomposition method. The control conditions are slightly different from that of zirconium. The temperature of sponge hafnium blocks around the iodization tank is kept at 600 ℃. In comparison, the temperature of the hot wire in the center is 1600 ℃, which is higher than 1300 ℃ when making a zirconium "crystal rod." The processing and molding of hafnium include forging, extrusion, tube drawing, and other steps, the same as the processing of zirconium.
Main uses of hafnium carbide The main use of hafnium is to make control rods for nuclear reactors. Pure hafnium is plastic, easy to process, high temperature, and corrosion resistant. It is an important material in the atomic energy industry. Hafnium has a large thermal neutron capture cross-section and is an ideal neutron absorber. It can be used as a control rod and protection device for atomic reactors. Hafnium powder can be used as a rocket propeller. In the electrical industry, it can manufacture the cathode of X-ray tubes. Hafnium alloys can be used as the front protective layer of rocket nozzles and glide reentry aircraft. Hf Ta alloys can be used to make tool steels and resistance materials. Hafnium is an additive element in heat-resistant alloys, such as tungsten, molybdenum, and tantalum alloys. Due to its high hardness and melting point, HfC can be used as an additive for cemented carbides. The melting point of 4TaC · HfC is about 4215 ℃, the compound with the highest melting point.
Price of Hafnium Carbide Hafnium Carbide particle size and purity will affect the product's price, and the purchase volume can also affect the cost of Hafnium Carbide. A large amount of large amount will be lower. The price of Hafnium Carbide can be found on our company's official website.
Hafnium Carbide supplier Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including Hafnium Carbide, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective Hafnium Carbide, you are welcome to contact us or inquire at any time.
