DISLOCATIONS AND THE TENSILE STRENGTH OF POLYCRYSTALLINE MAGNESIUM OXIDE
HONEYWELL RESEARCH CENTER HOPKINS MN
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The tensile strength of polycrystalline magnesia can be high approximately 30,000 psi providing there are no fresh or mobile dislocations present. These dislocations may originate in one of two ways. In the first, they may be introduced directly by mechanical contact with the surface. In the second, they may be generated indirectly through the stress concentrations associated with pores. To attain tensile strengths higher than 10-15,000 psi it is necessary to use fully dense pore free material whose surface has been chemically polished or otherwise protected from mechanical contact.
- Inorganic Chemistry