Titanium has the advantages of low density, high specific strength and good corrosion resistance. Titanium used in automobiles can greatly reduce the quality of the body, reduce the fuel consumption, improve the working efficiency of the engine, improve the environment and reduce the noise. However, the expensive price of titanium alloy in the automotive industry […]
Tags: pure titanium, titanium, titanium alloy, Titanium alloy parts, titanium rod
When of sufficient purity, zirconium is soft and ductile. It has good corrosion resistance and low absorption capacity for thermal neutrons. These properties are desirable in materials used for certain parts of nuclear reactors. The great increase in production of zirconium since 1945 has been the direct result of construction of nuclear reactors. Zirconium is […]
Tags: alloys of zirconium, Zircaloy, Zirconium, zirconium metal
Hafnium occurs in zirconium ores. Because this metal must be removed from “reactor grade” zirconium, the production of hafnium is largely dependent on zirconium production, as discussed later. Its melting point is 4032 F. However, it has not been available in sufficiently large quantities to have any extensive elevated-temperature applications other than in control rods […]
Tags: Hafnium, Hafnium oxide, hafnium product, X-ray tubes
The platinum-group metals can be described as refractory metals because of their high melting points. This group comprises platinum, osmium, iridium, ruthenium, rhodium and palladium, i. e., metals which have properties similar to those of platinum. The metals in this group are quite scarce and, hence, can be considered only for very specialized applications even […]
Tags: palladium, Platinum, platinum group, platinum metals, platinum wire
Rhenium is classified as a scarce refractory metal. It has the second highest melting point of any of the metals and has relatively high density. Rhenium is produced as a powder from molybdenite, which also contains rhenium sulfide. The rhenium powder is consolidated by pressing and resistance sintering in a vacuum or hydrogen atmosphere. Rhenium […]
Tags: Refractory Metals, rhenium, Rhenium bars, rhenium powder, thermocouple alloys
The melting point of chromium is the lowest of the abundant refractory metals, but it is more than 700 degrees above that of iron. The density of chromium is slightly less than that of iron. At elevated temperatures, it acquires an adherent oxide film on the surface that tends to protect it from further oxidation […]
Tags: Chromium, Chromium metal
The melting point of vanadium is about 1000 degrees lower than that of columbium, so there is much less interest in vanadium for high temperature applications than in the abundant refractory metals. Pure vanadium has only recently become available in quantities large enough for thorough studies of its physical and mechanical properties and for alloy […]
Tags: Pure vanadium, Refractory Metals, Titanium alloys, Vanadium, vanadium columbium
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 […]
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Molybdenum. As shown in Table 2, the melting temperature of molybdenum is 695 degrees below that of tantalum. Because of its high melting point and relative abundance in the United States, it was the first of the refractory metals considered in this country for high-temperature structural applications. The primary use of molybdenum had been as […]
Tags: Molybdenum, molybdenum metal, molybdenum-tungsten alloys
Tantalum occurs in columbium ores. As the demand for columbium increases, increasing amounts of tantalum concentrates become available. After a difficult and complex separation and reduction process, both metals are obtained in the form of powder. The powder is pressed in dies to form bars which are vacuum sintered by passing high currents through them […]
Tags: chemical industry, electrolytic capacitors, pure tantalum, tantalum, tantalum alloy
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