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Title: Strengthening, Crack Arrest And Multiple Cracking In Brittle Materials Using Residual Stresses.

Abstract

Embodiments include a method for forming a glass which displays visible cracking prior to failure when subjected to predetermined stress level that is greater than a predetermined minimum stress level and less than a failure stress level. The method includes determining a critical flaw size in the glass and introducing a residual stress profile to the glass so that a plurality of visible cracks are formed prior to failure when the glass is subjected to a stress that is greater than the minimum stress level and lower than the critical stress. One method for forming the residual stress profile includes performing a first ion exchange so that a first plurality of ions of a first element in the glass are exchanged with a second plurality of ions of a second element that have a larger volume than the first ions. A second ion exchange is also performed so that a plurality of the second ions in the glass are exchanged back to ions of the first element.

Inventors:
 [1];  [2];  [3]
  1. (State College, PA)
  2. (Roncegno, IT)
  3. (Fremont, CA)
Issue Date:
Research Org.:
Pennsylvania State Univ., University Park, PA (United States)
OSTI Identifier:
879644
Patent Number(s):
6516634
Application Number:
09/502284
Assignee:
The Penn State Research Foundation (University Park, PA) CHO
DOE Contract Number:  
FG02-86ER45252
Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

Green, David J., Sglavo, Vincenzo M., and Tandon, Rajan. Strengthening, Crack Arrest And Multiple Cracking In Brittle Materials Using Residual Stresses.. United States: N. p., 2003. Web.
Green, David J., Sglavo, Vincenzo M., & Tandon, Rajan. Strengthening, Crack Arrest And Multiple Cracking In Brittle Materials Using Residual Stresses.. United States.
Green, David J., Sglavo, Vincenzo M., and Tandon, Rajan. Tue . "Strengthening, Crack Arrest And Multiple Cracking In Brittle Materials Using Residual Stresses.". United States. https://www.osti.gov/servlets/purl/879644.
@article{osti_879644,
title = {Strengthening, Crack Arrest And Multiple Cracking In Brittle Materials Using Residual Stresses.},
author = {Green, David J. and Sglavo, Vincenzo M. and Tandon, Rajan},
abstractNote = {Embodiments include a method for forming a glass which displays visible cracking prior to failure when subjected to predetermined stress level that is greater than a predetermined minimum stress level and less than a failure stress level. The method includes determining a critical flaw size in the glass and introducing a residual stress profile to the glass so that a plurality of visible cracks are formed prior to failure when the glass is subjected to a stress that is greater than the minimum stress level and lower than the critical stress. One method for forming the residual stress profile includes performing a first ion exchange so that a first plurality of ions of a first element in the glass are exchanged with a second plurality of ions of a second element that have a larger volume than the first ions. A second ion exchange is also performed so that a plurality of the second ions in the glass are exchanged back to ions of the first element.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {2}
}

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