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    Deep non-frangible stress profiles and methods of making
    83.
    发明授权
    Deep non-frangible stress profiles and methods of making 有权

    公开(公告)号：US11377388B2

    公开(公告)日：2022-07-05

    申请号：US17306191

    申请日：2021-05-03

    Applicant: CORNING INCORPORATED

    Inventor： Pascale Oram ,  Rostislav Vatchev Roussev ,  Vitor Marino Schneider ,  Emily Elizabeth Young

    IPC: C03C21/00 ,  C03C3/097

    Abstract: A non-frangible glass article strengthened by a dual or two-step ion exchange (IOX) process, where the first IOX step leads to a depth of compressive layer FSM_DOL>0.1·t or, in some embodiments, FSM_DOL>0.15·t, where t is the thickness of the glass, is provided. The glass article has a compressive stress CS1 after the first IOX step at the surface of from 100 MPa to 400 MPa or, in some embodiments, from 150 MPa to 300 MPa. The first IOX step is followed by a second IOX step, leading to a “spike” compressive stress CS2 after the second IOX step at the surface of greater than 500 MPa or, in some embodiments, 700 MPa. The width of the spike generated by the second IOX is between 1 μm and 30 μm, or between 8 μm and 15 μm, using the criteria where the magnitude (absolute value) of the slope of the spike is higher than 20 MPa/μm.

    METHODS OF IMPROVING THE MEASUREMENT OF KNEE STRESS IN ION-EXCHANGED CHEMICALLY STRENGTHENED GLASSES CONTAINING LITHIUM
    85.
    发明申请
    METHODS OF IMPROVING THE MEASUREMENT OF KNEE STRESS IN ION-EXCHANGED CHEMICALLY STRENGTHENED GLASSES CONTAINING LITHIUM 有权

    公开(公告)号：US20210140836A1

    公开(公告)日：2021-05-13

    申请号：US17157190

    申请日：2021-01-25

    Applicant: CORNING INCORPORATED

    Inventor： Ryan Claude Andrews ,  Rostislav Vatchev Roussev ,  Vitor Marino Schneider

    IPC: G01L1/24 ,  G01N21/43 ,  G01N33/38 ,  G01N21/23 ,  C03C21/00 ,  G01N21/552

    Abstract: Methods of improving the measurement of knee stress in an ion-exchanged chemically strengthened Li-containing glass sample that includes a knee are disclosed. One of the methods includes compensating for a shift in the location of the TIR-PR transition location associated with the critical angle location, wherein the shift is due to the presence of a leaky mode. Another method includes applying select criteria to the captured mode spectra image to ensure a high-quality image is used for the knee stress calculation. Another method combines direct and indirect measurements of the knee stress using the mode spectra from multiple samples to obtain greater accuracy and precision as compared to using either the direct measurement method or the indirect measurement method alone. Quality control methods of forming the glass samples using measured mode spectra and related techniques for ensuring an accurate measurement of the knee stress are also disclosed.

    SCRATCH RESISTANT GLASS AND METHOD OF MAKING
    88.
    发明申请
    SCRATCH RESISTANT GLASS AND METHOD OF MAKING 审中-公开

    公开(公告)号：US20200308046A1

    公开(公告)日：2020-10-01

    申请号：US16826473

    申请日：2020-03-23

    Applicant: CORNING INCORPORATED

    Inventor： Jaymin Amin ,  Xiaoju Guo ,  Pascale Oram ,  Rostislav Vatchev Roussev ,  Ljerka Ukrainczyk ,  Taylor Marie Wilkinson

    IPC: C03C21/00 ,  C03C3/12 ,  C03C3/093 ,  C03C4/18 ,  H05K5/00 ,  H05K5/03

    Abstract: Glass-based articles comprise stress profiles providing improved scratch resistance. A glass-based article comprises a lithium aluminosilicate composition and a molar ratio of potassium dioxide (K2O) to sodium dioxide (Na2O) averaged over a distance from the surface to a depth of 0.4 micrometers that is greater than or equal to 0 and less than or equal to 1.8. The article comprises sodium having a non-zero varying concentration extending from a surface of the glass-based article to a depth of the glass-based article and a spike depth of layer that is greater than or equal to 4 micrometers and less than or equal to 8 micrometers. The article may comprise an average compressive stress of greater than or equal to 150 MPa over a depth from 15 micrometers to 40 micrometers.

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