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Pyroceram has excellent thermal resistance due to its ________

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Pyroceram has excellent thermal resistance due to its ________

(a) Surface finish

(b) Melting point

(c) Ion exchange

(d) Grain size

This question was posed to me during an online exam.

The origin of the question is Fracture Toughness, Protection against Fracture in division Imperfection in Metal Crystals, Fracture, Corrosion and Oxidation of Engineering Material & Metallurgy

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Right option is (d) Grain size

Explanation: Pyroceram is otherwise known as crystallized glass. It has excellent thermal and mechanical shock resistance due to its fine grain size. The grain size found in pyroceram is about 0.1 μm.

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