Characterization of displacement cascade damage in ordered alloys using transmission electron microscopy

Jenkins, M. L.; English, C.A.

doi:10.1016/0022-3115(82)90470-6

Cited by 46 publications

(12 citation statements)

References 17 publications

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“…This has' been convincingly demonstrated in the ordered alloy Cu-jAu irradiated both with ions and with neutrons [2]. We will show in this paper that this collapse process also takes place in some metals at an irradiation temperature of 30 K, and therefore that many dislocation loops form athermally from defect cascades within 10" 11 second.…”

Section: Introductionmentioning

confidence: 51%

The collapse of defect cascades to dislocation loops

Kirk

Robertson

Jenkins

et al. 1987

Journal of Nuclear Materials

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102

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We review a number of experiments that we have recently performed to investigate the collapse of defect cascades to dislocation loops. This important ion and neutron irradiation phenomenon has been studied with in situ ion bombardment in the Argonne National Laboratory High Voltage Electron Microscope -Ion Accelerator Facility at temperatures of 30 and 300 K in CugAu, Cu, and Fe, and 30, 300 and 600 K in Ni. These experiments have demonstrated that individual defect cascades collapse to dislocation loops athermally at 30 K in some materials (Ni, Cu and CU3AU), while in another material (Fe) only overlapped cascades produced dislocation loops. A slight sensitivity to the irradiation temperature is demonstrated in Cu-jAu and Fe, and a strong dependence on the irradiation temperature is seen in Ni. This phenomenon of cascade collapse to dislocation loops in metals at 30 K provides an understanding for previous neutron irradiation data. The more detailed dependencies of the collapse probability on material, temperature, bombarding ion dose, ion energy and ion mass contribute much information to a thermal spike model of the collision cascade which we will describe.

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Section: Introductionmentioning

confidence: 51%

The collapse of defect cascades to dislocation loops

Kirk

Robertson

Jenkins

et al. 1987

Journal of Nuclear Materials

Self Cite

102

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“…The aspect ratio and size distribution of the disordered zones, which appear as dark regions in superlattice DF-TEM images, have been studied as a function of the mass and the energy of the projectile, and as a function of the irradiation temperature. Average diameters range from 3 to 10 nm in Cu 3 Au, 8,10 and from 5 to 9 nm for Ni 3 Al. 11 As the projectile energy increases, the size of the disordered zones saturates because of the formation of subcascades.…”

Section: Introductionmentioning

confidence: 99%

Nanoscale patterning of chemical order induced by displacement cascades in irradiated alloys. I. A kinetic Monte Carlo study

Jia

Bellon

2004

Phys. Rev. B

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Dense displacement cascades produced by irradiation with energetic particles lead to the formation of disordered zones in chemically ordered alloys. At temperatures below the order-disorder transition, these disordered zones, whose sizes range from a few to several nanometers, are annealed out by thermally activated atomic migration. Under sustained irradiation, the competition between these two dynamics may drive the system into various steady states of order. Kinetic Monte Carlo simulations are employed to identify these steady states in a model binary alloy that forms an L1 2 ordered phase at equilibrium. Besides the expected long-range ordered and disordered steady states, a new state is observed, where the microstructure is comprised of well-ordered domains of finite size. This steady-state patterning of order is identified by direct visualizations of the configurations, and by using an effective fluctuation-dissipation formula to analyze the behavior of the fluctuations of order upon approaching the long-range ordered steady state. It is shown that the patterning state becomes stable only when the disordered zones exceed a threshold size. Above this threshold size, reordering of cascade-induced disordered zones proceeds in two stages: new antiphase domains form first, and then shrink to the benefit of the matrix. This two-stage reordering is at the origin of the dynamical stabilization of patterns of order. The present results, which indicate that ion-beam processing could be used to synthesize ordered nanocomposites with tunable sizes, call for specific experimental tests.

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“…3 Typically, disordered zones are highly disordered, and they range in size from 1 to 20 nm in diameter. In the case of ordered alloys, this forced mixing can produce disordered zones.…”

Section: Atomistic Modeling Of Nanoscale Patterning Of L1 2 Order Indmentioning

confidence: 99%

Atomistic modeling of nanoscale patterning of L12 order induced by ion irradiation

Jia

Averback

et al. 2010

Journal of Applied Physics

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Characterization of displacement cascade damage in ordered alloys using transmission electron microscopy

Cited by 46 publications

References 17 publications

The collapse of defect cascades to dislocation loops

The collapse of defect cascades to dislocation loops

Nanoscale patterning of chemical order induced by displacement cascades in irradiated alloys. I. A kinetic Monte Carlo study

Atomistic modeling of nanoscale patterning of L12 order induced by ion irradiation

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