Phase Diagrams
The Pertitectic Diagram

· Silver and Platinum have different melting points and a Peritectic reaction.

· Silver melts at 961 C, and Platinum melts at 1769 C. The Peritectic invariant reaction occurs at 1200 C, with the peritectic composition of Ag- 52% Pt. (Alloy 1)
· The invariant reaction converts a liquid and a solid to a single solid phase: 
After: Guy and Hren, "Elements of Physical Metallurgy," Addison Wesley (1974)