Solutions PS2.pdf - Assignment 2 Ceramic Phase Diagrams...

This preview shows page 1 - 3 out of 6 pages.

Assignment 2Ceramic Phase DiagramsSOLUTIONSQ1. ) Construct the hypothetical binary system L-G above 1000oC, which represents thefollowing conditions (label all areas):a) Component L and G melt at 1600 and 1700oC, respectively,b) Compound LG melts congruently at 1500oC,c) Compound LG9melts incongruently at 1450oCd) A maximum of 20% LG is soluble in L forming a solid solution (phase)e)"""10% L is soluble in LG (phase)f) There is a eutectic betweenandat 1300oC at 30%Gg) There are two liquids at equilibrium above 1450oC between 55 and 70%of G.h) A eutectic exists between LG and LG9at 1300oC at 73%GLLGLG9G1300C1450C1600C1450C1700CγLG
Q2.) Under equilibrium conditions, describe the melting behaviour of mullite and givethe composition and amounts of the phases at 1830oC. Describe the meltingbehaviour of a 50 mole% Al2O3ceramic. At equilibrium, which phases form andin what amounts at 1400, 1600, 1800, 1830, 1900 and 2000oC? What mixture ofphases might be obtained under non-equilibrium conditions (rapid cooling) andwhy?

Upload your study docs or become a

Course Hero member to access this document

Upload your study docs or become a

Course Hero member to access this document

End of preview. Want to read all 6 pages?

Upload your study docs or become a

Course Hero member to access this document

Term
Fall
Professor
Robin Drew
Tags
Materials Science, Solidus, Liquidus, LG

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture