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  2. Ceramic forming techniques - Wikipedia

    en.wikipedia.org/wiki/Ceramic_forming_techniques

    Ceramic shell casting techniques using silica, zirconia and other refractory materials are currently used by the metal parts industry for 'net casting', forming precision shell moulds for molten metal casting. The technique involves a successive wet dipping and dry powder coating or stucco to build up the mould shell layer.

  3. Zirconium alloys - Wikipedia

    en.wikipedia.org/wiki/Zirconium_alloys

    Corrosion resistance of zirconium alloys is enhanced by intentional development of thicker passivation layer of black lustrous zirconium oxide. Nitride coatings might also be used. Whereas there is no consensus on whether zirconium and zirconium alloy have the same oxidation rate, Zircaloys 2 and 4 do behave very similarly in this respect.

  4. Tetragonal polycrystalline zirconia - Wikipedia

    en.wikipedia.org/wiki/Tetragonal_polycrystalline...

    Yttria blends of approximately 3% are called either tetragonal polycrystalline zirconia or tetragonal zirconia polycrystal (forming the initialisms TZP or TPZ) and have the finest grain size. These grades exhibit the highest toughness at room temperature, because they are nearly 100% tetragonal, but this degrades severely between 200 and 500 ...

  5. Thermal barrier coating - Wikipedia

    en.wikipedia.org/wiki/Thermal_barrier_coating

    Thermal barrier coatings typically consist of four layers: the metal substrate, metallic bond coat, thermally-grown oxide (TGO), and ceramic topcoat. The ceramic topcoat is typically composed of yttria-stabilized zirconia (YSZ), which has very low conductivity while remaining stable at the nominal operating temperatures typically seen in TBC ...

  6. Zirconium - Wikipedia

    en.wikipedia.org/wiki/Zirconium

    Zirconium is a chemical element; it has symbol Zr and atomic number 40. First identified in 1789, isolated in impure form in 1824, and manufactured at scale by 1925, pure zirconium is a lustrous transition metal with a greyish-white color that closely resembles hafnium and, to a lesser extent, titanium.

  7. NFL playoff picture: Projected playoff teams, standings for ...

    www.aol.com/nfl-playoff-picture-projected...

    We're two-thirds of the way through the 2024 NFL season. Here's how the playoff picture looks ahead of Week 13:

  8. Conversion coating - Wikipedia

    en.wikipedia.org/wiki/Conversion_coating

    A conversion coating is a chemical or electro-chemical treatment applied to manufactured parts that superficially converts the material into a thin adhering coating of an insoluble compound. These coatings are commonly applied to protect the part against corrosion , to improve the adherence of other coatings, for lubrication , or for aesthetic ...

  9. Food poisoning is extremely common. But that doesn't ... - AOL

    www.aol.com/food-poisoning-extremely-common...

    Few things will put a damper on your vacation or holiday faster than food poisoning.The intense stomach pain, rushing to the toilet and feeling relegated to bed keeps just about everyone out of ...