Sheet, foil hafnium
Supplier — AvekGlob company — offers at affordable prices from the manufacturer a sheet and foil of hafnium. The supplier guarantees the timely delivery of products to any address specified by the consumer.
Hafnium sheets and foil of vacuum remelting are made according to the norms of TU 48−4-502−88. The main admixture in hafnium is zirconium. Hafnium is plastic, and has a characteristic silvery sheen. The metal has a close-packed hexagonal crystal structure. It has excellent mechanical properties and has extremely good corrosion resistance. However, its properties are largely influenced by the degree of zirconium impurity.
The fine powder of hafnium is pyrophoric and can spontaneously ignite in the air. Hafnium leaves and foil are resistant to concentrated alkalis, but react with oxygen, nitrogen, carbon, boron, sulfur and silicon, as well as with halogens at elevated temperatures.
Urgency of application
Hafnium sheets and foil have a good absorption cross section for thermal neutrons (approximately 600 times greater than that of zirconium). Therefore, they are actively used in nuclear technologies. Other practical applications of hafnium are gas-filled lamps and incandescent lamps, as well as getters for oxygen and nitrogen and ultrasonic technologies.
Sheet hafnium contains up to 99.5% of zirconium and hafnium, while the content of zirconium should not exceed 1%. Of the other impurities present in hafnium sheets and foil, it is necessary to isolate sulfur, aluminum, scandium, iron, molybdenum, niobium, tantalum and silicon.
Physical and mechanical properties
- Density, kg / m 3 — 13100;
- Melting point, 0 С — 2233;
- Modulus of elasticity, GPa — 206;
- Specific heat capacity, J / kggrad −20… −45 (the sharp increase in heat capacity corresponds to the temperature range 50… 85 0 С);
- Coefficient of thermal conductivity at room temperature, W / mdg — 9;
- The limit of temporary resistance, MPa — 365… 380;
- Limit of plasticity, MPa — 180… 190;
- Relative elongation at tension,% — 31… 42;
- Hardness according to Brinell, HB, not more — 131.
Assortment and application features
Sheet and foil of hafnium are available in thicknesses of 0.02 mm, widths up to 1200 mm and lengths up to 3000 mm. Hafnium is sometimes subjected to recrystallization annealing to increase ductility.
Supplier — AvekGlob company — offers to buy sheet or foil made of hafnium in a wide range of thickness, width and length. Products can be bought at a price formed on the basis of European and world standards of production. Implementation is possible in bulk and retail, for regular customers, a flexible system of discounts operates.