Can the heating curve decrease after solidus?

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Majid Bagheri

Maybe an endothermic reaction occurs when the temperature reaches above the solidus temperature. It seems that a DSC or DTA test can better determine the cause.

Ramin Raiszadeh

Majid Bagheri Salam. Thank you for your answer and suggestion. The endothermic reaction exactly after solidus is melting. But as melting does not require superheat, and happens just a tiny bit above solidus, Such a huge decrease in temperature is not expected.