• Support PF! Buy your school textbooks, materials and every day products Here!

(ceramics) grain size

  • Thread starter asdf1
  • Start date
  • #1
734
0
Why is it that the larger the grain size, the smaller the grain-boundary contribution to diffusivity?
 

Answers and Replies

  • #2
Astronuc
Staff Emeritus
Science Advisor
18,706
1,720
The larger the grain size, the less grain boundaries and the less grain boundary surface area.

One method of determining grain size in polycrystalline materials is the linear intercept method. On can draw a straight line and determine how many grain boundaries are intercepted. This has been correlated with a mean grain size.
 
  • #3
734
0
The grain-boundary has higher entropy, because it has a mixture of different type of atoms, is that correct?
 

Related Threads for: (ceramics) grain size

Replies
1
Views
550
Replies
13
Views
2K
  • Last Post
Replies
2
Views
7K
  • Last Post
Replies
2
Views
3K
Replies
2
Views
5K
Replies
6
Views
920
Replies
2
Views
2K
Top