[Jewelry making - Article 01295] - [Orchid] Ag-Cu phase diagram

[Janet Yang]

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    There's a silver-copper phase diagram at 

    http://www.metallurgy.nist.gov/phase/solder/agcu-w.jpg 

    The largest area shows where the alloys are solid, and the uppermost
    area shows where they are liquid. The areas between represent
    semi-solid states. 

    What do the remain two areas (on the left and right edges)
    represent? 

    About the semi-solid states: Is this the cause of the surface
    texture that sometimes occurs in eutectic soldering? Is the graph
    saying that it is (nearly) impossible to keep the adjacent areas
    smooth? 

Janet



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