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A Bond-Type Criterion to Predict Bombardment-Induced Structure Changes in Non-Metallic Solids

  • H. M. Naguib
  • Roger Kelly

Abstract

Radiation damage, as found in non-metallic solids bombarded to high doses, often takes the form of structure or stoichiometry changes. For example, many instances are known in which a bombarded specimen is rendered either cystalline or amorphous independent of the initial structure. A previously formulated thermal-spoke model is reviewed and shown to remain a viable means of understanding the cystal structure. In addition, a bond-type cristerion, which has apparerntly not been treated in detail elsewhere, is discussed. It is surprisingly successful, as is shown by the fact that 21 which amorphize on ion impact have ionicities of ≤ 0.47 while 23 substances which are stable in cystalline form have values of ≥ 0.60. A further 7 substances have intermadiate ionicities (whence varying behavior) while 4 constitute exceptions (SnO2, W18O49, Ta2O5)

Keywords

Unpublished Work Bond Type Stoichiometry Change Substitutional Disorder Initial State Structure 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1974

Authors and Affiliations

  • H. M. Naguib
    • 1
  • Roger Kelly
    • 2
  1. 1.Dept. of Metallurgy, Faculty of EngineeringCairo UniversityEgypt
  2. 2.Institute for Materials ResearchMcMaster UniversityHamiltonCanada

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