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Beryllium melts at 1252 °C and silicon melts at 1414°C. They are completely soluble as liquids, but completely insoluble as solids. They form a eutectic at 1090 °C containing 39% beryllium. Draw the thermal equilibrium diagram and label all fields. Explain, with the aid of sketches, what happens when liquid alloys containing (a) 90% beryllium, (b) 30% beryllium solidify completely during a slow cooling process. In each case determine the amount (%) of eutectic in the cooled solid 3.

engineering   Mechanical-Engineering   
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Answer #1

ATE As theャ00 metals a-re in linuid state but completely insoluble os solidsit is the eutectic allo competely soluble 414 나Liquid 2. emperature D. 3 si + eutectic Be t Cutecttc So 4 -10-20-30-40-50-60-70-go-go- 跁 Weight Be cooling of hyper entecHC Lloy cao th go Bemlium Fsom to2 theme is no change in iquid state of alloy At just belesolidificaHon sternts. 3 Be seperates out fom the liquid. ns the demperature deczeases amount ef Be increases salidifies for ms eutecHc mixture of se si in -at-constant-tempesat me

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