What is the difference between DBT and Tg

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In summary, the ductile to brittle transition temperature and glass transition temperature are two different temperature points that determine the behavior of materials. Not all materials have both of these temperatures, and the presence or absence of these temperatures depends on the properties of the material. Some amorphous materials have both Tg and DBT, while others may only have one. Metallic glasses are a type of material that may have a glass transition temperature.
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dmssrinivas
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Ductile to brittle transition temperature and Glass transition temperature. I know these two are different but don't know in what sense.

Does all the materials have both of these temperatures or only some or none? If only some or none, what property of material will allow it to have only one?
 
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  • #2
Did you try googling this before you asked your question? The first hit on wikipedia addresses this directly.
 
  • #3
May be you are talking about amorphous materials have Tg and Crystalline materials have DBT, but that does not convince me because, some amorphous polymers have crystalline property too.

And what metallic glasses are?? Don't they have Glass transition temperature?
 

What is the difference between DBT and Tg?

DBT and Tg are both measurements used in material science, specifically in the study of polymers. They are related to the temperature at which a material changes from a solid to a liquid state, but they have different meanings and applications.

What does DBT stand for?

DBT stands for "double bond temperature", also known as "glass transition temperature". It is the temperature at which a polymer transitions from a glassy or brittle state to a rubbery or flexible state.

What does Tg stand for?

Tg stands for "glass transition temperature". It is the temperature at which a material changes from a glassy or brittle state to a rubbery or flexible state. It is also referred to as "softening temperature".

How are DBT and Tg related?

DBT and Tg are related in that they both refer to the temperature at which a material changes from a solid to a liquid state. However, DBT specifically refers to the temperature at which the material becomes rubbery, while Tg refers to the temperature at which the material begins to soften.

Why are DBT and Tg important in material science?

DBT and Tg are important in material science because they provide crucial information about the properties and behavior of polymers. These measurements can help scientists understand how a material will respond to changes in temperature, and how it may perform in different conditions or applications. They are also used in quality control to ensure the consistency and reliability of polymer products.

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