4. Phase Diagrams

Binary Diagrams — Quiz

Test your understanding of binary diagrams with 5 practice questions.

Practice Questions

Question 1

Which feature in an isomorphous binary phase diagram indicates a prolonged temperature interval during which both liquid and solid coexist at a given alloy composition?

Question 2

For an alloy of 40 wt% B at a temperature where the liquid composition C_L=75 wt% B and the solid composition C_S=25 wt% B, what is the fraction of liquid f_L present?

Question 3

Graphically on a tie-line in the two-phase region of a binary diagram, the mass fraction of solid f_S is proportional to the length of which segment?

Question 4

A 200 g sample of a binary alloy has overall composition C_0=50 wt% B at a temperature where C_L=70 wt% B and C_S=30 wt% B. How many grams of solid are present?

Question 5

The lever rule for phase fraction calculations in binary phase diagrams assumes which condition at the phase boundaries?