Solid Solution in Binary Systems

1
Solid Solution in Binary Systems

• What is it?
• Identification
• Analyzation

2
Solid Solution in Binary Systems

• Solid Solution is defined as a single crystalline
  phase which may vary in composition within finite
  limits without the appearance of an additional
  phase.

3
Example of Simple Solid Solution

• Example of a simple solid solution diagram

• Maximum solubility of CaO in NiO is about 26

• Maximum solubility of NiO in CaO is about 48

4
Analyzation of Solid Solution

• What tools are needed to Analyze Solid Solution

• Naming of unlabeled regions

• Using Tie Lines to interpret phases

• Using Isopleths to determine percent of phases

5
Analyzation of Solid Solution

• Name the unlabeled regions

Liquid region
CaO solid solution
NiO solid solution
NiO CaO
NiO Liquid
NiO Liquid
6
Analyzation of Solid Solution

• Pick a composition to be analyzed
• Draw an isotherm
• Perform an isoplethal analysis on the given
  composition
• Interpretation

7
Analysis of Solid Solution

• Pick your composition 20 CaO

• Perform an isoplethal analysis

• Determine important temperatures
• 1875 degrees
• 1775 degrees
• 1650 degrees

8
Analysis of Solid Solution

• Determine percent phases at each temperature
  using tie lines
• Make sure an analysis is done above and below
  each temperature