Your SlideShare is downloading. ×
0
5 6 13 intro to solid state phase transformation
5 6 13 intro to solid state phase transformation
5 6 13 intro to solid state phase transformation
5 6 13 intro to solid state phase transformation
5 6 13 intro to solid state phase transformation
5 6 13 intro to solid state phase transformation
5 6 13 intro to solid state phase transformation
5 6 13 intro to solid state phase transformation
5 6 13 intro to solid state phase transformation
5 6 13 intro to solid state phase transformation
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

5 6 13 intro to solid state phase transformation

94

Published on

A brief introduction to solid state phase transformation

A brief introduction to solid state phase transformation

Published in: Education, Technology, Business
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
94
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
4
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Introduction to solid state phase transformation R.Arul Vigneswar 7/12/2013 Summer intern seminar 1
  • 2. Phase • “Physically distinct, chemically homogeneous and mechanically separable part of a system” • Involves I. State of aggregation II. Composition III. Crystal structure IV. Electronic structure 7/12/2013 Summer intern seminar 2
  • 3. Atom movements • Movements over a. A large number of interatomic distance (ex. Long range diffusion) b. One or two interatomic distance (ex. Short range diffusion) c. Fraction of interatomic distance (ex. Diffusionless changes) 7/12/2013 Summer intern seminar 3
  • 4. Types • Change in composition 7/12/2013 Summer intern seminar 4 α α1 + α2 FCC FCC FCC 39.5 21 56 Structure Zn,at.%
  • 5. • Change in crystal structure 7/12/2013 Summer intern seminar 5 δ Fe γ Fe α Fe1392°C 911°C Structure BCC FCC BCC
  • 6. • Compositional and crystal structure changes 7/12/2013 Summer intern seminar 6 α supersat α sat + θ Structure FCC FCC BCT Cu,wt.% 4.5 0.3 52 Austenite Ferrite + Cementite FCC BCC Orthorhombic 0.8 0.02 6.69 Structure C,wt.%
  • 7. • Change in order 7/12/2013 Summer intern seminar 7
  • 8. • Electronic transitions I. Curie temperature in Iron (769°C) II. Neel temperature in MnO (-157°C) 7/12/2013 Summer intern seminar 8
  • 9. Homogeneous and heterogeneous transformations • Homogeneous transformation- takes place simultaneously in all parts • Heterogeneous transformation- nucleation and growth type 7/12/2013 Summer intern seminar 9
  • 10. Reference 7/12/2013 Summer intern seminar 10

×