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← ScienceWhich mechanism causes brittleness in ceramics containing ionic bonds?
A)Electrostatic repulsion prevents plastic deformation✓
B)Covalent bond saturation enables dislocation glide
C)Van der Waals forces increase grain ductility
D)Hydrogen bonds facilitate cleavage fracture
💡 Explanation
The electrostatic repulsion between similarly charged ions causes brittleness because *dislocation movement* is inhibited; therefore, ceramics fracture easily rather than deform because ionic bonds prevent necessary atom rearrangements.
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