1.

What is fracture toughness of magnesia in terms of stress intensity factor?

A. 1 MPa m<sup>1/2</sup>
B. 2 MPa m<sup>1/2</sup>
C. 3 MPa m<sup>1/2</sup>
D. 5 MPa m<sup>1/2</sup>
Answer» D. 5 MPa m<sup>1/2</sup>


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