Help determining phase diagram of Pb-Sb alloy

[jpandrew19]

Hello,

I'm new to the forums and hope this is the correct area to post this question:

I've Recently conducted a lab in class where we melted an alloy of Pb-Sb in order to determine its cooling curve. We did two different weight compositions (11.2% Sb) and (17.5% Sb) and recorded their temperatures upon heating them to an initial temperature of approximately 350 C. Additionally, our lab provides a series of crudely drawn cooling curves of other known weight compositions that were done as well.

I'm aware these cooling curves serve as the liquidus line of my phase diagram but am confused as to what sort of methods I should approach to help construct the rest of my phase diagram with the known information that I have.

Any help is appreciated,

Thanks.

 

[Achy47]

Hello there,

Thank you for sharing your lab results with us. It sounds like you have already made some progress in understanding the cooling curves and their relationship to the liquidus line on a phase diagram.

To construct the rest of your phase diagram, you will need to continue collecting data points for different weight compositions. This can be done by conducting additional experiments with different weight percentages of Pb and Sb, and recording their cooling curves. You can also utilize the cooling curves provided in your lab to fill in any missing data points.

Once you have a sufficient number of data points, you can plot them on a graph and connect them to form the solidus line. This line represents the temperature at which the alloy completely solidifies. By connecting the liquidus and solidus lines, you will have a complete phase diagram for your Pb-Sb alloy.

Additionally, you can also use thermodynamic calculations and equations to further verify and refine your phase diagram. This may involve determining the enthalpy of fusion and other thermodynamic properties of the alloy.

I hope this helps guide you in constructing your phase diagram. Feel free to ask any further questions or share your progress with us. Good luck with your research!