STP683

    Neutron Irradiation-Induced Defect Structures in Zirconium

    Published: Jan 1979


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    Abstract

    A transmission electron microscope (TEM) was used to study the neutron irradiation-induced defect structures in zirconium from various sources irradiated to fluences up to 1.3 × 1025 neutrons (n)/m-2 > 0.1 MeV and temperatures in the range 478 to 823 K. Below 673 K the predominant form of damage consists of ⅓ ⟨110⟩ dislocation loops. At higher irradiation temperatures, depending on specimen purity, the defects may include faulted ⅙ ⟨203⟩ loops and voids in addition to the perfect ⅓⟨110⟩ loops. The temperature regime of the stability of the various defects was defined. Quantitative measurements showing the effect of irradiation temperature and specimen purity are presented and discussed.

    Keywords:

    zirconium, radiation damage, crystal defects, electron microscopy, dislocation loops, voids


    Author Information:

    Jostsons, A
    Leader, Materials Science Section; chief, Materials Division; and experimental officer, Australian Atomic Energy Commission Research Establishment, Lucas Heights, N.S.W.

    Kelly, PM
    Leader, Materials Science Section; chief, Materials Division; and experimental officer, Australian Atomic Energy Commission Research Establishment, Lucas Heights, N.S.W.

    Blake, RG
    Leader, Materials Science Section; chief, Materials Division; and experimental officer, Australian Atomic Energy Commission Research Establishment, Lucas Heights, N.S.W.

    Farrell, K
    Oak Ridge National Laboratory, Oak Ridge, Tenn.


    Paper ID: STP38157S

    Committee/Subcommittee: E10.07

    DOI: 10.1520/STP38157S


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