Isomorphous system refers to a type of binary alloy system where two metals or elements can dissolve in each other in the liquid and solid state. This means that the crystal structures of the two elements are the same, which allows them to form a solid solution.
The phase diagram of nickel and copper is an example of an isomorphous system. The phase diagram shows the phases that are present at different temperatures and compositions of the alloy.
At low temperatures and compositions, both nickel and copper exist in a solid phase, and the two metals are not miscible in each other. As the temperature increases, the solubility of copper in nickel and nickel in copper increases, and a single-phase solid solution is formed. This phase is called the alpha phase, or the solid solution phase.
As the temperature and concentration continue to increase, a second phase appears in the diagram. This phase is a solid solution of copper and nickel with a different composition from the alpha phase, and it is called the beta phase.
At even higher temperatures, the alloy melts and becomes a liquid solution. The liquid solution is also a single-phase mixture of copper and nickel.
The phase diagram of nickel and copper is symmetrical because the two metals have similar crystal structures and atomic radii, which means that the solubility of copper in nickel and nickel in copper is almost the same. This symmetry leads to the formation of a eutectic point, which is the point where the liquid phase transforms into two solid phases – alpha and beta, at a specific temperature and concentration.
In summary, the isomorphous system of nickel and copper has a phase diagram that shows the different phases present at different temperatures and concentrations of the alloy, including a solid solution phase, a second solid solution phase, and a eutectic point.
Ankit Sharma is the Chief Editor at Uptu Khabar. He is passionate about new age digital marketing tools and their integration with the AI.
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