Question

E 45: In class problems May 16, 2019 Problem 1 Construct the TTT diagram for SiO from the information given below Melting point of SiO2 = 1710 C; Crystalline form of SiOCristobalite; Glass Transition temperature of SiO=1100 C Estimated times (calculated from computer simulations) for nucleation of first cristobalite crystal and complete transformation to 100% cristobalite are given below (at five different temperatures) Completion start of cristobalite nucleation Temperature 1014 years 10 years 1600 C 1012 years 104 years 1500 C 1010 vears 10' years 1400 C 1014 years 10 years 1300 C 101 years 10 years 1200 C Your sketch of the TTT diagram MUST clearly show the regions of liquid Supercooled liquid, cristobalite, and glass

Material Science

Answer 1

S.ir Suprcool Gomputin 1400 1300 12 o0 Glas (sto) 0 0 6