Platinum and gold are completely soluble in both the liquid and solid states. The melting point of platinum is 3225°F and that of gold is 1945°F. An alloy containing 40% gold starts to solidify at 2910°F by separating crystals of 15 percent gold in solid. An alloy containing 70% gold starts to solidify at 2550°F by separating crystals of 37% gold in solid. Draw the equilibrium diagram to scale on a piece of graph paper and label all points, lines and areas. For an alloy containing 70% gold (a) give the temperature of initial and final solidification. (b) Give the chemical composition and relative amounts of the phases present at 2440°F.

Platinum and gold are completely soluble in both the liquid and solid states. The melting point of platinum is 3225°F and that of gold is 1945°F. An alloy containing 40% gold starts to solidify at 2910°F by separating crystals of 15 percent gold in solid. An alloy containing 70% gold starts to solidify at 2550°F by separating crystals of 37% gold in solid. Draw the equilibrium diagram to scale on a piece of graph paper and label all points, lines and areas. For an alloy containing 70% gold (a) give the temperature of initial and final solidification. (b) Give the chemical composition and relative amounts of the phases present at 2440°F.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter2: Steady Heat Conduction

Section: Chapter Questions

Problem 2.35P

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