What is Pb Sn phase diagram?
Eutectic 1 Upon cooling, the liquid will transform into two mixed solid phases. We will use the Pb-Sn phase diagram as an example. Pb-Sn alloys are used as common solders. phase is a solid solution of Sn with Pb as the solute.
What are the phases in a cooling curve?
A cooling curve is a line graph that represents the change of phase of matter, typically from a gas to a solid or a liquid to a solid. The independent variable (X-axis) is time and the dependent variable (Y-axis) is temperature.
What does a cooling curve look like?
Just like heating curves, cooling curves have horizontal flat parts where the state changes from gas to liquid, or from liquid to solid. These are mirror images of the heating curve.
What is the eutectic composition of Pb in Pb Sn system?
The vertical green line identifies the Eutectic alloy composition, Pb-61.9 wt % Sn. This alloy has a unique melting point (as do the two elements Pb {327 C} and Sn{232 C}).
What is Proeutectic?
One thing that you might be wondering is what in the world “proeutectic” means. The proeutectic point on a phase diagram can be found at the temperature where the mixture transitions into a mixture of two solids. In this phase diagram, there are two proeutectic temperatures.
What is binary phase diagram?
A binary phase diagram shows the phases formed in differing mixtures of two elements over a range of temperatures. Compositions run from 100% Element A on the left of the diagram, through all possible mixtures, to 100% Element B on the right. The composition of an alloy is given in the form A – x%B.
How do you calculate cooling time?
Time Required for Heating/Cooling = [ M x C p x Log(( T – t1 )/( T- t2 )) ] / ( U x A ).
How do you measure cooling?
Using the energy equation of Q = ṁ x Cp x ΔT we can calculate the cooling capacity. We add 273.15K to the celcius to convert it to units of Kelvin. The Specific heat capacity (Cp) is measured in units of kJ per kg per Kelvin. This gives us a final answer of Q = 2,500kW of cooling.