Question

Which do you think will have a larger impact on the density of a ceramic a Frenkel or Schottky defect? Why? Explain why thermoplastics can be softened by heating as opposed to thermosets. Show how two phase regions only need one variable to complete define the phase compositions as opposed to single phase fields which need two variables using the Gibb's phase rule.

Answer 1

+ Cation intorst frankel defect! interstitidy cation vacan cancy missing of cation from its position and moved interstitial position in lattice to one cation & one anion will be Schottky defect; missed from lattice. will have lower den density so schottky defect compare with frankel defect.

plastically deform (@1 soften will Thermoplastics: they on heatin heating Linear chains Nander wall forces present between chains Je These are weak. very o so on will broken and molecules will be starts alo cross-links present. heating they will easily ( moving Thermo set ;- Crosslinking molecules are between chains very * Due to tight No se condary bonds like Vanderwall bonds. ☆ ) Between the chains also only covalent bonds present very strong we Can't break Theis on heating are

F-6-P+1 I phase field =2 2 =) Tand c independly in IL - 2-1+1 = phase field. 2 . phase field F-2-24=1 c-defends and T -not Independent