Question

A 10 cm long magnesium plate is coated with a thin layer of fused quartz. The composite is then heated from 20 to 400C. Calculate the lengths of both the metal and quartz. If the coating is tightly bonded to the substrate, what is the elongation of the coating, providing the coating did not crack? The linear coefficients of thermal expansion for magnesium and fused quartz are 25 × 10-6 and 0.55 × 10-6/K, respectively

Answer 1