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← ScienceWhich outcome results when tensile stress misaligns grains in polycrystalline ceramics?
A)Reduced thermal shock resistance✓
B)Increased piezoelectric coefficient
C)Enhanced superconducting transition
D)Increased Young's modulus
💡 Explanation
Reduced thermal shock resistance arises because **microcrack propagation** occurs when pre-existing flaws align with stress. The propagation generates discontinuities; therefore, thermal shock resistance diminishes rather than alternatives like piezoelectric enhancement that requires crystalline order.
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