Related Species Of Niobium
Niobium powder for metallurgy
Niobium powder is generally prepared by powder metallurgy, and its appearance is dark gray. It is used for processing raw materials and producing welding rods. According to different product requirements, niobium powder is divided into three grades: FNb-1, FNb-2 and FNb-3. FNb-1 and FNb-2 niobium powder should pass through 150um (100 mesh) sieve, FNb-3 niobium powder should pass through 180um (80 mesh) sieve.
Niobium Zirconium Alloy
An alloy formed by adding metal zirconium to metal niobium. Zirconium mainly exists in the state of solid solution in niobium alloy. When there is a trace amount of carbon and carbon or a trace amount of carbon is added, a small amount of carbides and oxides are dispersed and precipitated. Therefore, niobium-zirconium makes the alloy have high strength and good plastic workability. Good oxidation resistance and alkali metal corrosion resistance.
Niobium pentoxide
Niobium oxide obtained by liquid-liquid extraction method is white or light yellow powder, which is used for the production of niobium powder, niobium bars and ceramic capacitors. According to different usage requirements and chemical compositions, the products are divided into three grades: FNb2O5-1, FNb2O5-2, and FNb2O5-3.
Tantalum and Niobium
It makes sense to put them together and introduce them, because they are the same family in the periodic table, with very similar physical and chemical properties, and they are often "inseparable". "twin brothers". In fact, when people first discovered niobium and tantalum in the early nineteenth century, they thought they were the same element. About forty-two years later, they were separated for the first time by chemical methods, and it became clear that they were two different metals. Like tungsten and molybdenum, niobium and tantalum are rare high-melting-point metals, and their properties and uses have many similarities.
Since they are called rare high melting point metals, the most important feature of niobium and tantalum is of course heat resistance. Their melting points are as high as more than 2,400 degrees Celsius and nearly 3,000 degrees Celsius respectively. Not to mention that ordinary fires can't burn them, even the sea of flames churning in the steel-making furnace can't help them. It is no wonder that tantalum metal is a very suitable material in some high-temperature and high-heat sectors, especially in the manufacture of vacuum heating furnaces of more than 1600 degrees.
The excellent properties of one metal can often be "transplanted" into another metal. Adding niobium as an alloying element to steel can increase the high temperature strength of the steel and improve the processing performance. Niobium and tantalum cooperate with a series of metals such as tungsten, molybdenum, vanadium, nickel, and cobalt to obtain "thermally strong alloys" that can be used as structural materials for supersonic jets, rockets, and missiles. Scientists have begun to turn their attention to niobium and tantalum when developing new high-temperature structural materials; many high-temperature, high-strength alloys have this pair of twin brothers participating.
Niobium and tantalum themselves are very tenacious, and their carbides are more resistant, which is no different from tungsten and molybdenum. The cemented carbide made of niobium and tantalum carbide as the matrix has high strength, compression resistance, wear resistance and corrosion resistance. Among all hard compounds, tantalum carbide has the highest hardness. The tool made of tantalum carbide carbide can withstand high temperatures below 3800 degrees, its hardness can match that of diamond, and its service life is longer than that of tungsten carbide.
