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Fracture Toughness / Fracture Energy Data for Oxide Glass

NIST Standard Reference Database 137


Borate Base Glassess

Reference:

Other material collections: Property Data Summaries

Other materials: Oxide Glasses


Other Borate Glasses materials

B2O3 Base Glasses: B70c

About Property Data Summaries.

Material Summary:

Molar composition: 70% B2O3 + 22.5% PbO + 7.5% ZnO

Property Summary:

Property                           Value  Environment  Notes
---------------------------------  -----  -----------  --------------------------------------
Crack Growth Exponent []   .......: 
Elastic Modulus [GPa]   ..........: 64.0   N2 liquid   
Fracture Energy [J/m2]  ..........: 11.82  N2 liquid  Controlled flaw 
Fracture Toughness [MPa m1/2].....:  1.23  N2 liquid  Controlled flaw
Crack Growth Exponent []   .......:
Elastic Modulus [GPa]   ..........: 64.0   Air                             
Fracture Energy [J/m2]  ..........:  4.61  Air          Controlled flaw 
Fracture Toughness [MPa m1/2].....:  0.77  Air          Controlled flaw