What are the characteristics and uses of tantalum materials？
Tantalum has a series of excellent properties such as high melting point, low vapor pressure, good cold working performance, high chemical stability, strong resistance to liquid metal corrosion, and large dielectric constant of surface oxide film.We do tantalum refining process fro many years. we can produce tantalum sheet, foil,tantalum bar,tantalum wire, tantalum pipe ,and aslo pipe fitting materials.
Tantalum has important applications in high-tech fields such as electronics, metallurgy, steel, chemicals, cemented carbide, atomic energy, superconducting technology, automotive electronics, aerospace, medical and health, and scientific research.50%-70% of the tantalum in the world is used in the production of tantalum capacitors in the form of capacitor-grade tantalum powder and tantalum wire. Since the surface of tantalum can form a dense and stable amorphous oxide film with high dielectric strength, it is easy to accurately and conveniently control the anodization process of the capacitor. At the same time, the tantalum powder sintered block can obtain a large surface area in a small volume, so tantalum Capacitors have high capacitance, low leakage current, low equivalent series resistance, good high and low temperature characteristics, long service life, excellent comprehensive performance, and other capacitors are difficult to match. It is widely used in communications (switches, mobile phones, pagers, Fax machines, etc.), computers, automobiles, household and office electrical appliances, instrumentation, aerospace, national defense and military industry and other industrial and technological sectors. Therefore, tantalum is an extremely versatile functional material.
The application of tantalum as an alloying element in steel is still very few. Tantalum has a very high affinity with interstitial atoms such as C and N in steel, and the compounds formed with them are very stable even at high temperatures.
Scholars from the Institute of Metal Research of the Chinese Academy of Sciences conducted a preliminary study on the strengthening effect of tantalum on Fe-C-Ta alloys and related mechanisms through mechanical performance testing and OM, SEM, and TEM observations. The research results show that when the tantalum content is increased from 0.027% to 0.059%, the strength of the alloy is greatly improved, and the impact energy of the high tantalum content alloy is reduced by 87J, but it still has better toughness. According to the analysis, the strengthening effect of tantalum in iron-based alloys is represented by solid solution strengthening and precipitation strengthening. After aging for 1h at 600℃ for high tantalum content alloys, its strength and plasticity reach the maximum at the same time, and the best tantalum-containing carbide is obtained. The precipitation strengthening effect.