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Asked: 2020-04-19T04:51:14+05:30 In:

BARC-7: Why do the Cooling Curves of Eutectic alloy and pure metal look similar despite Eutectic being an alloy?

BARC-7: Why do the Cooling Curves of Eutectic alloy and pure metal look similar despite Eutectic being an alloy?
BARC-7: Why do the Cooling Curves of Eutectic alloy and pure metal look similar despite Eutectic being an alloy?
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    3 Answers

    1. Silver Metallurgical Engineering student

      Eutectic reaction takes place at single temperature. It has degrees of freedom is zero '0'. Means transformation is at single temperature like in pure metals. So both cooling curves looks similar.  

      Eutectic reaction takes place at single temperature. It has degrees of freedom is zero ‘0’. Means transformation is at single temperature like in pure metals. So both cooling curves looks similar.

       

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    2. Platinum

      Eutectic reaction takes place at a constant temp. Means all the liquid solidifies to solid at a constant temp like a pure metal.So both have similar type of cooling curve. And at the solidified temp where the phase transformation takes place ,degree of freedom is zero. Means no of independent variabRead more

      Eutectic reaction takes place at a constant temp. Means all the liquid solidifies to solid at a constant temp like a pure metal.So both have similar type of cooling curve. And at the solidified temp where the phase transformation takes place ,degree of freedom is zero. Means no of independent variables are zero.

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    3. Platinum Gate aspirant.

      The Eutectic alloy transformation occurs at constant temperature (Eutectic temperature).  The same goes for the pure metal transformation at constant temperature (Freezing temperature), during cooling. This can be seen from the Gibbs phase rule which has, F=0 in both the cases. This means that thereRead more

      The Eutectic alloy transformation occurs at constant temperature (Eutectic temperature).  The same goes for the pure metal transformation at constant temperature (Freezing temperature), during cooling.

      This can be seen from the Gibbs phase rule which has, F=0 in both the cases. This means that there is no independent variables during transformation and so it occurs at constant variable (temperature here).

      So we see that both Eutectic and pure metal have same cooling curve although eutectic is an alloy (doesn’t depend on composition).

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