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← ScienceWhich bonding mechanism causes increased brittleness in ceramic implants containing high magnesium oxide?
A)Increased ionic character aggregation ✓
B)Enhanced Van der Waals forces
C)Network covalent bond stabilization
D)Metallic bond dislocation impediment
💡 Explanation
Increased magnesium oxide forms more ionic bonds; because ionic bonds have strong electrostatic attractions but limited slippage, brittle fracture sensitivity rises; therefore, ceramics become more prone to catastrophic failure, rather than deforming plastically.
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