Interstitial Defect - Effects of Interstitials

Effects of Interstitials

Interstitials modify the physical and chemical properties of materials.

  • Interstitial carbon atoms have a crucial role for the properties and processing of steels, in particular carbon steels.
  • Impurity interstitials can be used e.g. for storage of hydrogen in metals.
  • The amorphization of semiconductors such as silicon during ion irradiation is often explained by the buildup of a high concentration of interstitials leading eventually to the collapse of the lattice as it becomes unstable
  • Creation of large amounts of interstitials in a solid can lead to a significant energy buildup, which on release can even lead to severe accidents in certain old types of nuclear reactors (Wigner effect). The high-energy states can be released by annealing.
  • At least in face-centered cubic (FCC) lattice, interstitials have a large diaelastic softening effect on the material
  • It has been proposed that interstitials are related to the onset of melting and the glass transition.

Read more about this topic:  Interstitial Defect

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