Low-Temperature Measurements of the Young's Modulus and Internal Friction of Copper during Irradiation

Thompson, Donald O.; Blewitt, T.H.; Holmes, D. K.

doi:10.1063/1.1722841

Cited by 66 publications

(8 citation statements)

References 4 publications

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“…The migration of irradiation-produced defects to dislocations and the subsequent pinning of the dislocations will shorten the average loop length, thus diminishing the modulus defect. The increase of the shear modulus of low-temperature irradiated copper over a narrow temperature interval near 50 O K during an isochronal annea1 (21,22) must be regarded as a strong indication for free migraDownloaded by ["Queen's University Libraries, Kingston"] at 21:04 03 January 2015 tion of a defect in this temperature range. It should be emphasized that irradiated gold does not show such a modulus increase at low temperat u r e~.…”

Section: Modiiius De Feet Recovery In Low-temperature Irradiated Coppermentioning

confidence: 98%

The interpretation of electron radiation damage in F.C.C. metals in terms of the conversion-two-interstitial model

Frank

Seeger

1969

Radiation Effects

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The present paper deals with the theoretical interpretation of the radiation damage and its Iecovery in f.c.c. metals. The relative merits of the one-interstitial and the conversion-two-interstitial model are discussed. It is concluded that only the conversion-two-interstitial model is able to account for all aspects of the experimental data presented in the literature.Since electron irradiation is expected to generate ielatively simple defect structures and since copper has so far been investigated in most detail, emphasis is put on electron radiation damage in copper: Recovery substage IE is demonstiated to be due to the free migration of metastable interstitials diffusing randomly in one dimension (presumably crowdions)'. The evidence that stage I11 is due to the annihilation of freely migrating <100>-dumbbell interstitials at vacancies is shown to be very strong. Whereas in typical resistivity recovery studied after lowtemperature irradiation the stage -111 interstitials are produced by afhermul conversion of crowdions, the pinning of dislocations during a y-irradiation above room temperature reveals the thermal conversion of crowdions. The activation energy for thermal conversion is estimated to lie between 0.30 eV and 0.38 eV.Apart from individual features, the radiation damage in the other f.c.c. metals fits well into the pattern given above for copper. A noteworthy pecularity is that in the recovery of gold and (h.c.p.) cadmium free migration of a defect at low-temperatures could not be observed. In terms of the conversion-two-interstitial model this has the simple explanation that in these metals the activation energy for thermal conversion of the low-temperature interstitial is smaller than its migration energy.

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Section: Modiiius De Feet Recovery In Low-temperature Irradiated Coppermentioning

confidence: 98%

The interpretation of electron radiation damage in F.C.C. metals in terms of the conversion-two-interstitial model

Frank

Seeger

1969

Radiation Effects

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“…27,28 Other studies argue that the path length to dissipate the energy transferred during irradiation is great enough to support our model. 29 "" 31 Another model has been proposed which maintains that the enhancement of resistivity increment during irradiation by deformation before the irradiation reflects deviations from Matthiessen's rule. 32 In particular it is proposed that the resistivity of Frenkel pairs in a lattice containing dislocations which give a larger contribution to the resistivity than do the point defects is much greater than the resistivity of the same concentration of Frenkel pairs in a lattice in which the dislocation contribution to resistivity is negligible.…”

Section: A Defect Production I Influence Of Deformation and Partialmentioning

confidence: 99%

Influence of Plastic Deformation and of Substitutional Gold on Defect Production and Recovery in Platinum

Jackson

Herschbach²

1968

Phys. Rev.

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Both the production of defects in Pt by deuteron irradiation at 6°K and the subsequent thermally activated recovery of these defects are perturbed when Pt is deformed or alloyed before irradiation. The atomic rearrangements that occur in the various recovery substages are known with perhaps less ambiguity in Pt than in any other metal. This knowledge is used to analyze in detail the interactions between the defects injected before the irradiation and the atoms displaced during the irradiation that produce these perturbations.

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“…This value for Fno is in marked disagreement with those inferred from the band calculations of Ham and others 4 and from Fermisurface data. 5 Examining Butcher's work one comes to the conclusion that within the one-electron approximation there are a number of deficiencies in Butcher's band model which might account for the discrepancy.…”

Section: Acknowledgmentsmentioning

confidence: 99%

“…1-3 At a temperature a little above temperatures associated with these close pairs, one has demonstrated long-range migration of an interstitial in copper and aluminum. [2][3][4][5] …”

Section: Introductionmentioning

confidence: 99%

Absorption of Light Due to Interband Transitions in Sodium

Appelbaum

1966

Phys. Rev.

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NUCLEAR SPIN RELAXATIONIN METALS: Rh, Pd, AND Ag 435 spin-lattice relaxation rate was found to be ten times faster than predicted. This enhancement might be associated with the strong electron-electron interactions in this metal. This conclusion, however, is quite tentative since electric-quadrupole and paramagneticimpurity processes may also contribute significantly. The impurity mechanism may be important despite the high purity of our samples, because of the long range of indirect spin couplings in palladium. It is hoped that

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Low-Temperature Measurements of the Young's Modulus and Internal Friction of Copper during Irradiation

Cited by 66 publications

References 4 publications

The interpretation of electron radiation damage in F.C.C. metals in terms of the conversion-two-interstitial model

The interpretation of electron radiation damage in F.C.C. metals in terms of the conversion-two-interstitial model

Influence of Plastic Deformation and of Substitutional Gold on Defect Production and Recovery in Platinum

Absorption of Light Due to Interband Transitions in Sodium

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