1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

(ceramics) grain size

  1. Oct 4, 2006 #1
    Why is it that the larger the grain size, the smaller the grain-boundary contribution to diffusivity?
  2. jcsd
  3. Oct 4, 2006 #2


    User Avatar
    Staff Emeritus
    Science Advisor

    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.
  4. Oct 6, 2006 #3
    The grain-boundary has higher entropy, because it has a mixture of different type of atoms, is that correct?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: (ceramics) grain size
  1. Grain diameter (Replies: 2)