Dear Parastu Fardi

please look at the following documents, they may help you:

https://vtechworks.lib.vt.edu/bitstream/handle/10919/36147/SepidehSayarPDF.pdf?sequence=1&isAllowed=y

Dear Parastu Fardi

please look at the following documents, they may help you:

https://vtechworks.lib.vt.edu/bitstream/handle/10919/36147/SepidehSayarPDF.pdf?sequence=1&isAllowed=y

Dear Parastu Fardi

It depends on sintering process.

In hot pressing, the only equation is energy conservation. I mean the conuction equation in solids.

In SPS, you need to solve two sets of equations. Electric current equation and conduction equation.

solidifications in indeed a most important processing route fr metal and alloys. Consider a pure metal. At the fusion temperature

1

Dear parastu,

I think direct equation is very difficult to find out. But subsidiary equation done by some other to find the solidification time is available. Just try it can work out for you.

1.. Tf , △G=0

△Gf= △Hf- T△Sf

For any temperature other than Tf,

△G= △Sf △T

Where △T is under cooling.

Above equation only can be used.

But for stages like nucleation and growth of kinetic transformation process AVRAMI equation can be used to find out the time for solidification. y=1- e-ktn

Where y is function transformed.

2.Chvorinov’s rule is also valid for determination of solidification time TST in this equation

TST= Cm (V/A)n , where TST= total solidification time, V= volume of casting, A= surface area of casting, n= exponent which is usually taken 2, and Cm is mold constant.

3. Scheil equation( namely scheil-guliver euation) can also be used for solidifaction by

(CL-CS)dFs= (fL) . dCL

Hope it is useful for you.

Ashish