15G Five kilograms of40wt% Pb-60 wt% Sn alloy is slowly lead-tin equilibrium pha

Question

15G Five kilograms of40wt% Pb-60 wt% Sn alloy is slowly lead-tin equilibrium phase diagram, answer the following: 3. cooled to-200°C. Based on the 327"C 300 232 C ( 200 183 C 18.3 61.9 97.8 100 0 20 40 60 80 100 (Sn) 1) The general eutectic reaction equation is 2) Maximum solubility of Pb and Sn are ( )% and ( )%, respectively. 3) The eutectic invariant reaction at ( )% Snand about ( rc. 4) At the eutectic temperature, the composition of and are ( )% and ( )%, respectively. Maximum solubility of lead and tin are ( )% and ( )%, respectively.

Explanation / Answer

Eutectic reaction composition =38% of pb + 62% of Sn

Pb + Sn =alloy.L(61.9%)---------:Pb(18.3%)+Sn(97.8).

Maximum solubility of Pb and Sn are 18.3% and 97.8%.

The eutectic invariant reaction means at that point,

the % of Sn is 62 at 183°c.

At eutectic temperature the composition of Pb 38% and 62% Sn.

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