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