Eutectics with partial solid solubility Flashcards
1
Q
Name a eutectic with partial solid solubility?
A
Sn-Pb
2
Q
Why is the industry trying to decrease lead-containing solders?
A
Due to the toxicity
3
Q
Describe the alpha phase of the Sn-Pb phase diagram.
A
Solid substitutional lattice of Sn with small amounts of Pb dissolved
4
Q
Describe the beta phase of Sn-Pb phase diagram.
A
Solid substitutional lattice of Pb with small amounts of Sn dissolved
5
Q
What is always between two single phase regions?
A
Two-phase regions
6
Q
What is a dendritic shape?
A
Tree/branch like structure
7
Q
During eutectic growth, how is a very fine structure formed?
A
A atoms are rejected from beta phase and incorporated into alpha phase and vice versa; physical movement of atoms by diffusion to be preferentially incorporated into different phases
