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  2. Tungsten - Wikipedia

    en.wikipedia.org/wiki/Tungsten

    Because of tungsten carbide's hardness, rings made of this material are extremely abrasion resistant, and will hold a burnished finish longer than rings made of metallic tungsten. Tungsten carbide rings are brittle, however, and may crack under a sharp blow.

  3. Subaru Ascent - Wikipedia

    en.wikipedia.org/wiki/Subaru_Ascent

    In exterior colors, Tungsten Metallic is replaced by Brilliant Bronze Metallic, the Touring model is now available the Ice Silver Metallic exterior. The adaptive cruise control system was also updated, with lane centering assist instead of the previous lane keep assist.

  4. Color of chemicals - Wikipedia

    en.wikipedia.org/wiki/Color_of_chemicals

    The color of chemicals is a physical property of chemicals that in most cases comes from the excitation of electrons due to an absorption of energy performed by the chemical. The study of chemical structure by means of energy absorption and release is generally referred to as spectroscopy .

  5. Tungsten carbide - Wikipedia

    en.wikipedia.org/wiki/Tungsten_carbide

    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 ...

  6. Metallic bonding - Wikipedia

    en.wikipedia.org/wiki/Metallic_bonding

    Metallic bonding is a type of chemical bonding ... Therefore, metals often have high boiling points, with tungsten ... Such colors are orders of magnitude more ...

  7. Sodium tungsten bronze - Wikipedia

    en.wikipedia.org/wiki/Sodium_tungsten_bronze

    Sodium tungsten bronze is a form of insertion compound with the formula Na x WO 3, where x is equal to or less than 1. So named because of its metallic lustre, its electrical properties range from semiconducting to metallic depending on the concentration of sodium ions present; it can also exhibit superconductivity .

  8. Chemical coloring of metals - Wikipedia

    en.wikipedia.org/wiki/Chemical_coloring_of_metals

    Brown or black can be used as a base color for copper patina. If the amount of chlorides decreases the color will be more bluish-green, if carbonate decreases, more yellow-green. [27] Black for copper. Solution of sodium polysulfide 2.5%, items must be submerged in the solution after color developing, wash, dry and wax or varnish colored object ...

  9. Scheelite - Wikipedia

    en.wikipedia.org/wiki/Scheelite

    Scheelite is a calcium tungstate mineral with the chemical formula Ca W O 4.It is an important ore of tungsten (wolfram). Scheelite is originally named after Swedish chemist Carl Wilhelm Scheele (1742–1786).