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Ivan
IvanCopper
Asked: April 26, 20202020-04-26T09:39:14+05:30 2020-04-26T09:39:14+05:30In: Thermodynamics & Rate Processes

Is recrystallization phenomenona a thermodynamic event ?

Is recrystallization phenomenona a thermodynamic event ?
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    1. Rohit.km Platinum Gate aspirant.
      2020-04-26T11:51:13+05:30Added an answer on April 26, 2020 at 11:51 am

      Yes it is. Simply we know what is the driving force for a recrystallization process. It is to reduce or eliminate the deformation in the sample. This can be the elimination of dislocation, stacking faults etc. But all of these reduce the internal energy of system bringing it to more stable state. SoRead more

      Yes it is.

      Simply we know what is the driving force for a recrystallization process.

      It is to reduce or eliminate the deformation in the sample. This can be the elimination of dislocation, stacking faults etc. But all of these reduce the internal energy of system bringing it to more stable state.

      So the driving force is the energy difference between deformed state and recrystallized state, which I think is a thermodynamic event.

      Feedback is welcomed.

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      • Ivan Copper
        2020-04-27T09:42:12+05:30Replied to answer on April 27, 2020 at 9:42 am

        If recrystallization is thermodynamic event , recrystallized nuclei originated must be thermodynamically stable nuclei . Recrystallization nuclei is "not thermodynamically stable nuclei".

        If recrystallization is thermodynamic event , recrystallized nuclei originated must be thermodynamically stable nuclei .

        Recrystallization nuclei is “not thermodynamically stable nuclei”.

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    2. Rohit.km Platinum Gate aspirant.
      2020-04-27T13:27:21+05:30Added an answer on April 27, 2020 at 1:27 pm

      I think this is because it can still decrease it's energy. Thermodynamics instability also means that still a decrease in energy is possible. What is the driving force for grain growth it's the further decrease in energy. However I too support its difficult to conclude that how it is a thermodynamicRead more

      I think this is because it can still decrease it’s energy. Thermodynamics instability also means that still a decrease in energy is possible. What is the driving force for grain growth it’s the further decrease in energy.

      However I too support its difficult to conclude that how it is a thermodynamic event .. nuclei may be in the metastable state. Also if I go through the mechanism this nuclei is not like nuclei formed during solidification. The nuclei is present in the cold deformed state previously in forms if like cells subgrains etc. It is the decrease in the internal energy in the presence of heat that make this process happens.

       

      However I eagerly wait for your point of view and explanation for the same.

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    3. [email protected] Platinum
      2020-04-28T13:46:01+05:30Added an answer on April 28, 2020 at 1:46 pm

      Recrystallisation is a process of formation of nuclei. The driving force for this process is the difference between the strain and unstrain energy. And by this process ultrafine grains are formed. When the dislocations are alligned in an array they forms sub grains. And the opposite dislocations areRead more

      Recrystallisation is a process of formation of nuclei. The driving force for this process is the difference between the strain and unstrain energy. And by this process ultrafine grains are formed. When the dislocations are alligned in an array they forms sub grains. And the opposite dislocations are cancel out with each other and defect free grains that is sub grains are formed during this process. Thermodynamically stable means gibbs free energy should be minimum. I think dt every processes are thermodynamics event .without the driving force no process can occur. And driving force is related to thermodynamics. In recrystallisation nuclei are formed when the grains are in most stable state means strain energy diff is minimum. So it is a thermodynamics event. If i m wrong plz correct me.

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    4. Mohamad Afzal Khan Gold
      2020-05-01T10:28:34+05:30Added an answer on May 1, 2020 at 10:28 am

      Yes, its activity may not be measured, but in nanotechnology thermodynamic function gets reversed

      Yes, its activity may not be measured, but in nanotechnology thermodynamic function gets reversed

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