Using the Cu-Ni phase diagram (Callister, Chap.9, pp. 288) estimate the following quantities for a nominal ...

Using the Cu-Ni phase diagram (Callister, Chap.9, pp. 288) estimate the following quantities for a nominal composition of 55%Ni – 45% Cu:

a) Liquidus Temperature,

b) Solidus Temperature,

c) The composition of the liqiud and solid phases present in alloy at 1300°C,

d) Using the inverse lever rule, find the amount (by weight) of liquid and

solid phases present in alloy.

Expert Solution

I will use a standard phase diagram of Copper nickel .

a) The liquidus temperature is the temperature above which the system is entirely liquid : As shown in the diagram the point is : (point B)1325⁰C

b) and the solidus is the temperature below which the system is completely solid: the poin is (A) : 1275 C

c) The composition at 1300 C is: Liquid and solid

d) lever rule is

Percent weight of liquid = weight of liquid - % wt of copper / weight of liquid - weight of solid -

= 42.5 - 45 / 42.5 - 60 = 0.142

Percent weight of solid = wieght of solid - % wt of copper / weight of solid - wieght of liquid =

= 60-45 / 60-42.5 = 0.971

queen_honey_blossom answered 1 year ago

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