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The jewelry industry makes rings of sintered tungsten carbide, tungsten carbide/metal composites, and also metallic tungsten. [78] WC/metal composite rings use nickel as the metal matrix in place of cobalt because it takes a higher luster when polished.
The blue line symbol. The "thin blue line" is a term that typically refers to the concept of the police as the line between law-and-order and chaos in society. [1]The "blue" in "thin blue line" refers to the blue color of the uniforms of many police departments.
The unit cell of beta-tungsten. Beta-tungsten (β-W) is a metastable phase of tungsten widely observed in tungsten thin films.While the commonly existing stable alpha-tungsten (α-W) has a body-centered cubic structure, β-W adopts the topologically close-packed A15 structure containing eight atoms per unit cell, [1] [2] and it irreversibly transforms to the stable α phase through thermal ...
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 ...
Tungsten steel is any steel that has tungsten as its alloying element with characteristics derived mostly from the presence of this element (as opposed to any other element in the alloy). Common alloys have between 2% and 18% tungsten by weight along with small amounts of molybdenum and vanadium which together create an alloy with exceptional ...
In chemistry, a tungstate is a compound that contains an oxyanion of tungsten or is a mixed oxide containing tungsten. The simplest tungstate ion is WO 2− 4 , "orthotungstate". [ 1 ] Many other tungstates belong to a large group of polyatomic ions that are termed polyoxometalates , ("POMs"), and specifically termed isopolyoxometalates as they ...