Amorphous Materials

  • Upload
    -

  • View
    252

  • Download
    0

Embed Size (px)

Citation preview

  • 7/31/2019 Amorphous Materials

    1/14

    Amorphous Materials

  • 7/31/2019 Amorphous Materials

    2/14

  • 7/31/2019 Amorphous Materials

    3/14

    If the molten Silica is cooled very slowly,

    then the sub-units fall into the regular

    crystal structure of Quartz, shown below.

    In glasses, the tetrahedral SiO2 structure

    forms the sub-unit, and it is the flexibility

    of corner to corner links that accounts for

    the ability of SiO2 to form the random

    structures shown below.

  • 7/31/2019 Amorphous Materials

    4/14

  • 7/31/2019 Amorphous Materials

    5/14

  • 7/31/2019 Amorphous Materials

    6/14

  • 7/31/2019 Amorphous Materials

    7/14

  • 7/31/2019 Amorphous Materials

    8/14

  • 7/31/2019 Amorphous Materials

    9/14

  • 7/31/2019 Amorphous Materials

    10/14

    1,500 oC

  • 7/31/2019 Amorphous Materials

    11/14

    (pyrex)

  • 7/31/2019 Amorphous Materials

    12/14

  • 7/31/2019 Amorphous Materials

    13/14

  • 7/31/2019 Amorphous Materials

    14/14