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The name tungsten (which means ' heavy stone ' in Swedish and was the old Swedish name for the mineral scheelite and other minerals of similar density) is used in English, French, and many other languages as the name of the element, but wolfram (or volfram) is used in most European (especially Germanic and Slavic) languages and is derived from ...
Tungsten carbide (chemical formula: WC) is a chemical compound (specifically, a carbide) containing equal parts of tungsten and carbon atoms. In its most basic form, tungsten carbide is a fine gray powder, but it can be pressed and formed into shapes through sintering [7] for use in industrial machinery, engineering facilities, [8] molding blocks, [9] cutting tools, chisels, abrasives, armor ...
In 2008 Norman E. Holden wrote (for IUPAC): Whether the origin of the dispute over wolfram and tungsten would justify the retention of wolfram as an alternate name for element 74, only time will tell. So "tungsten" definitely dominates in English, but "wolfram" is not completely gone (just mostly gone). Double sharp 10:45, 18 December 2022 (UTC)
Tungsten disulfide is the first material which was found to form non-carbon nanotubes, in 1992. [6] This ability is related to the layered structure of WS 2 , and macroscopic amounts of WS 2 have been produced by the methods mentioned above. [ 13 ]
The coefficient of thermal expansion of cemented tungsten carbide is found to vary with the amount of cobalt used as a metal binder. For 5.9% cobalt samples, a coefficient of 4.4 μm/m·K was measured, whereas 13% cobalt samples have a coefficient of around 5.0 μm/m·K.
Tungsten trioxide is a starting material for the synthesis of tungstates. Barium tungstate BaWO 4 is used as a x-ray screen phosphors . Alkali metal tungstates, such as lithium tungstate Li 2 WO 4 and cesium tungstate Cs 2 WO 4 , give dense solutions that can be used to separate minerals. [ 1 ]
Tungsten ore is a rock from which the element tungsten can be economically extracted. The ore minerals of tungsten include wolframite, scheelite, and ferberite. Tungsten is used for making many alloys. Tungsten ore deposits are predominantly magmatic or hydrothermal in origin and are associated with felsic igneous intrusions. [1]
Alloy wheels have long been included as standard equipment on higher-priced luxury or sports cars, with larger-sized or "exclusive" alloy wheels being options. The high cost of alloy wheels makes them attractive to thieves; to counter this, automakers and dealers often use locking lug nuts or bolts which require a special key to remove.
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