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The Young's modulus and ultimate tensile strength of the most popular ceramic material, aluminum oxide or alumina (Al2O3) are 370 GPa and 300MPa, if

 

The Young's modulus and ultimate tensile strength of the most popular ceramic material, aluminum oxide or alumina (Al2O3) are 370 GPa and 300MPa, if it has zero porosity GPa. (a) Determine the porosity of an alumina if its Young's modulus is measured as 325 (b) Determine the exponent n if the same alumina as in (a) is measured to have an ultimate tensile strength of 210 MPa

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