Chapter 10, Problem 10.55P

Interpretation Introduction

Interpretation:

The amount of nickel in grams that must be added to copper is to be calculated to give an alloy of desired properties. Also, the ratio of the number of nickel atoms to copper atoms in this alloy is to be determined.

Concept Introduction:

On the temperature-composition graph of an alloy, the curve above which the alloys exist in the liquid phase is the liquidus curve. The temperature at this curve is maximum known as liquidus temperature at which the crystals in the alloy can coexist with its melt in the thermodynamic equilibrium.

Solidus curve is the locus of the temperature on the temperature composition graph of an alloy, beyond which the alloy is completely in solid phase. The temperature at this curve is minimum known as solidus temperature at which the crystals in the alloy can coexist with its melt in the thermodynamic equilibrium.

Percentage of a component in an alloy is calculated as:

  $\%M_i=\frac{x_i}{{\displaystyle \sum _i{x}_i}}\times 100\%$ ...... (1)