Refractory metal refers to the metals with a certain reserve and the melting point of which is higher than 1650 ℃. Refractory metals include tungsten, tantalum, molybdenum, niobium, hafnium, chromium, vanadium, zirconium and titanium. Rhenium also has a high melting point, but its reserves are too small, and most of it is used in high-temperature […]
The atomic sequences of tantalum (Ta) and niobium (Nb) are 73 and 41 respectively, both of which are located in the area of the excessive element of VB. They are often symbiotic in nature and are important refractory metals. They have many excellent properties, such as high melting point, high boiling point, low vapor pressure, […]
Niobium has a melting point of 4474 F, which is 256 degrees lower than that of molybdenum. Development of niobium metal and its alloys for elevated-temperature structural applications was started only a few years ago, but considerable progress has been made since then. One factor that has been important in the development of niobium is its low […]
Refractory metals are different. As a group they provide a number of unique characteristics – such as resistance to high heat, corrosion and wear – making them useful in a multitude of applications. The next time you climb into your automobile take note that you are surrounded by components which are made of refractory metals […]
Refractory elements are important alloying additions in both nickel-base and ironnickel-base superalloys. They are responsible for the increased high temperature mechanical properties present in current superalloy systems. It has long been established that nickel-base and iron-nickel-base superalloys are “super” because they are strengthened by a dispersion of fine and coherent gamma-prime (y) and at times […]
In actual fact, niobium, like all other metals, is gray. However, by applying a passifying oxide layer, we allow our metal to gleam in a beautiful array of colors. Niobium is ductile and occurs with tantalum in a natural ore. Like tantalum, niobium also features outstanding chemical and oxidation resistance. Niobium has a gleaming white […]
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