When.com Web Search

Search results

  1. Results From The WOW.Com Content Network
  2. Graphite - Wikipedia

    en.wikipedia.org/wiki/Graphite

    The expanded graphite can be used to make graphite foil or used directly as a "hot top" compound to insulate molten metal in a ladle or red-hot steel ingots and decrease heat loss, or as firestops fitted around a fire door or in sheet metal collars surrounding plastic pipe (during a fire, the graphite expands and chars to resist fire ...

  3. Graphite intercalation compound - Wikipedia

    en.wikipedia.org/wiki/Graphite_intercalation...

    The graphite interlayer distance increases upon Ca intercalation from 3.35 to 4.524 Å, and the carbon-carbon distance increases from 1.42 to 1.444 Å. Structure of CaC 6 With barium and ammonia , the cations are solvated, giving the stoichiometry ( Ba(NH 3 ) 2.5 C 10.9 (stage 1)) or those with caesium , hydrogen and potassium ( CsC 8 ·K 2 H 4 ...

  4. Allotropes of carbon - Wikipedia

    en.wikipedia.org/wiki/Allotropes_of_carbon

    Likewise, under standard conditions, graphite is the most stable form of carbon. Therefore, it is used in thermochemistry as the standard state for defining the heat of formation of carbon compounds. Graphite conducts electricity, due to delocalization of the pi bond electrons above and below the planes of the carbon atoms. These electrons are ...

  5. Ductile iron - Wikipedia

    en.wikipedia.org/wiki/Ductile_iron

    Ductile iron is used in many piano harps (the iron plates which anchor piano strings). Ductile iron is used for vises. Previously, regular cast iron or steel was commonly used. The properties of ductile iron make it a significant upgrade in strength and durability from cast iron without having to use steel, which is expensive and has poor ...

  6. Refractory - Wikipedia

    en.wikipedia.org/wiki/Refractory

    Common examples of these materials are alumina (Al 2 O 3), chromia (Cr 2 O 3) and carbon. [2] Carbon graphite refractories mainly consist of carbon. These refractories are often used in highly reducing environments, and their properties of high refractoriness allow them excellent thermal stability and resistance to slags.

  7. Malleable iron - Wikipedia

    en.wikipedia.org/wiki/Malleable_iron

    In order to properly form the spherical-shaped nodules of graphite (called temper graphite nodules or temper carbon nodules) in the annealing process, care must be taken to ensure that the iron casting will solidify with an entirely white iron cross section. Thicker sections of a casting will cool slowly, allowing some primary graphite to form ...

  8. Allotropy - Wikipedia

    en.wikipedia.org/wiki/Allotropy

    Diamond and graphite are two allotropes of carbon: pure forms of the same element that differ in crystalline structure.. Allotropy or allotropism (from Ancient Greek ἄλλος (allos) 'other' and τρόπος (tropos) 'manner, form') is the property of some chemical elements to exist in two or more different forms, in the same physical state, known as allotropes of the elements.

  9. Compacted graphite iron - Wikipedia

    en.wikipedia.org/wiki/Compacted_graphite_iron

    Compacted graphite iron (CGI), also known as vermicular graphite iron (GJV, VG, [1] JV [2] or GGV from the German: "Gusseisen mit Vermiculargraphit" [3]) especially in non-English speaking countries, [4] is a metal which is gaining popularity in applications that require either greater strength, or lower weight than cast iron.