SiO2 Base Glasses: S71d

About Property Data Summaries.

Reference: NBS Technical Note 1212

Other materials: Silicate Glasses

Material Summary:

Molar composition: 71.3% SiO2 + 1.16% Al2O3 + 7.43% CaO + 0.632% K2O + 5.91% MgO + 13.4% Na2O

Property Summary:

Property                           Value  Environment  Notes
---------------------------------  -----  -----------  --------------------------------------
Crack Growth Exponent []   .......: 
Elastic Modulus [GPa]   ..........: 73.4   N(g) gas     
Fracture Energy [J/m2]  ..........:  3.86  N(g) gas     Double cantilever beam
Fracture Toughness [MPa m1/2].....:  0.75  N(g) gas     Double cantilever beam

Crack Growth Exponent []   .......:
Elastic Modulus [GPa]   ..........:      
Fracture Energy [J/m2]  ..........: 
Fracture Toughness [MPa m1/2].....:  0.77  Mineral oil  Double torsion

Crack Growth Exponent []   .......:
Elastic Modulus [GPa]   ..........:      
Fracture Energy [J/m2]  ..........: 
Fracture Toughness [MPa m1/2].....:  0.76  Air          Double torsion

Crack Growth Exponent []   .......: 13     H2O        Static fatigue,surface cond.-abraded
Elastic Modulus [GPa]   ..........:      
Fracture Energy [J/m2]  ..........: 
Fracture Toughness [MPa m1/2].....: 

Crack Growth Exponent []   .......: 27.4   Air,100% RH  Dynamic fatigue,surface cond.-acid
                                                       etch and abraded
Elastic Modulus [GPa]   ..........:      
Fracture Energy [J/m2]  ..........: 
Fracture Toughness [MPa m1/2].....: 

Crack Growth Exponent []   .......: 19.4   6N NaOH      Double cantilever beam
Elastic Modulus [GPa]   ..........:      
Fracture Energy [J/m2]  ..........: 
Fracture Toughness [MPa m1/2].....: 

Crack Growth Exponent []   .......: 32     6N HCl       Double cantilever beam
Elastic Modulus [GPa]   ..........:      
Fracture Energy [J/m2]  ..........: 
Fracture Toughness [MPa m1/2].....: 

Crack Growth Exponent []   .......: 18.5   H2O        Double cantilever beam
Elastic Modulus [GPa]   ..........:      
Fracture Energy [J/m2]  ..........: 
Fracture Toughness [MPa m1/2].....:
 
Crack Growth Exponent []   .......: 19.3   H2O        Double cantilever beam
Elastic Modulus [GPa]   ..........:      
Fracture Energy [J/m2]  ..........: 
Fracture Toughness [MPa m1/2].....: 

Crack Growth Exponent []   .......: 15.2   H2O        Dynamic fatigue
Elastic Modulus [GPa]   ..........:      
Fracture Energy [J/m2]  ..........: 
Fracture Toughness [MPa m1/2].....:


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Date created: 08 February 2001
Last updated: 08 February 2001

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