Ion-beam irradiation of Gd2Sn2O7 and Gd2Hf2O7 pyrochlore: Bond-type effect

Ceramics with III-IV pyrochlore compositions, A3+2B4+2O7 (A = Y and rare earth elements; B = Ti, Zr, Sn, or Hf), show a wide range of responses to ion-beam irradiation. To evaluate the role of the B-site cations on the radiation stability ofthe pyrochlore structure-type, Gd2Sn2O7 and Gd2Hf2O7 have been irradiated by1 MeV Kr+. The results are discussed in terms of the ionic size and type ofbonding of Sn4+ and Hf4+ and compared to previous results for titanate andzirconate pyrochlores. Gd2Sn2O7 is sensitive to ion beam–induced amorphizationwith a critical amorphization dose of approximately 3.4 displacements per atom(dpa) (2.62 × 1015 ions/cm2) at room temperature and a critical amorphization temperature of approximately 350 K. Gd2Hf2O7 does not become amorphous at adose of approximately 4.54 displacement per [lattice] atom (3.13 × 1015 ions/cm2) at room temperature, but instead is transformed to a disordered fluorite structure upon ion-beam irradiation. Although the radius ratio of the A- to B-site cations provides a general indication of the type of radiation response of different pyrochlore compositions, the results for Gd2Sn2O7 emphasize the importance of bond type, particularly the covalency of the 〈Sn–O〉 bond in determining the radiation response.

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Ion Beam-Induced Amorphization of the Pyrochlore Structure-Type: A Review

MRS Proceedings ◽

10.1557/proc-792-r2.1 ◽

2003 ◽

Vol 792 ◽

Cited By ~ 8

Author(s):

R. C. Ewing ◽

J. Lian ◽

L. M. Wang

Keyword(s):

Structural Changes ◽

Dominant Role ◽

Ion Beam ◽

Pyrochlore Structure ◽

Fluorite Structure ◽

Radiation Response ◽

Beam Irradiation ◽

Ion Beam Irradiation ◽

Wide Range ◽

The Ideal

ABSTRACTThis paper reviews the recent developments in the understanding of the radiation-damage processes in A2B2O7 (Fd3m; Z=8) pyrochlore-structure compounds. Pyrochlore structure compounds display a wide range of behaviors in response to ion beam irradiation. Some compositions, such as Gd2Ti2O7, are amorphized at relatively low doses (∼0.2 dpa at room temperature) while other compositions, such as Gd2Zr2O7, do not amorphize (even at doses of 36 dpa at 25 K) and instead disorder to a defect fluorite structure. The response to ion beam irradiation is highly dependent on compositional changes that affect both the structural distortion from the ideal fluorite structure and the associated energetics of the disordering process. Generally, the ionic size of the cations plays a dominant role in determining the radiation response of different pyrochlore compositions. However, the cation ionic radius ratio criteria cannot be applied all-inclusively in predicting the radiation “tolerance” of a pyrochlore. Systematic irradiation studies of the radiation response of rare-earth (A-site) pyrochlores in which B = Ti, Zr, and Sn have shown that the behavior of the pyrochlore also depends on the cation electronic structure, i.e., the type of bonding, which is closely related to the polyhedral distortion and structural deviation from the ideal fluorite structure. These structural changes affect the dynamic defect recovery process directly linked to the material's response to and recovery from irradiation.

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Microstructure evolution during silicon oxidation at room temperature under composite ion beam irradiation

Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms ◽

10.1016/j.nimb.2013.10.059 ◽

2014 ◽

Vol 326 ◽

pp. 273-277 ◽

Cited By ~ 2

Author(s):

K.E. Prikhodko ◽

B.A. Gurovich ◽

D.A. Komarov ◽

D.A. Goncharova ◽

L.V. Kutuzov

Keyword(s):

Microstructure Evolution ◽

Room Temperature ◽

Ion Beam ◽

Beam Irradiation ◽

Ion Beam Irradiation ◽

Silicon Oxidation

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Growth kinetics of CoSi formed by ion beam irradiation at room temperature

Journal of Applied Physics ◽

10.1063/1.366460 ◽

1997 ◽

Vol 82 (11) ◽

pp. 5480-5483 ◽

Cited By ~ 15

Author(s):

A. Baba ◽

H. Aramaki ◽

T. Sadoh ◽

T. Tsurushima

Keyword(s):

Growth Kinetics ◽

Room Temperature ◽

Ion Beam ◽

Beam Irradiation ◽

Ion Beam Irradiation ◽

Kinetics Of

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Ion beam irradiation effects in strontium zirconium phosphate with NZP-structure type

Journal of Nuclear Materials ◽

10.1016/j.jnucmat.2013.11.048 ◽

2014 ◽

Vol 446 (1-3) ◽

pp. 224-231 ◽

Cited By ~ 11

Author(s):

Daniel J. Gregg ◽

Inna Karatchevtseva ◽

Gordon J. Thorogood ◽

Joel Davis ◽

Benjamin D.C. Bell ◽

...

Keyword(s):

Zirconium Phosphate ◽

Ion Beam ◽

Structure Type ◽

Beam Irradiation ◽

Irradiation Effects ◽

Ion Beam Irradiation ◽

Nzp Structure

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Influence of Beam Energy of Ions on Properties of Nickel Nanowires

10.3762/bxiv.2021.3.v1 ◽

2021 ◽

Author(s):

Shehla Honey ◽

Jamil Asim ◽

Adnan Shahid Khan ◽

Aisida O Samson ◽

Ishaq Ahmad ◽

...

Keyword(s):

Electrical Conductivity ◽

Beam Energy ◽

Room Temperature ◽

Ion Beam ◽

Point Contact ◽

Optical Transmittance ◽

Beam Irradiation ◽

Ion Beam Irradiation ◽

Nickel Nanowires

Electrical conductivity and optical transmittance of Nickel Nanowires (Ni-NWs) networks was reported in this work. The Ni-NWs was irradiated with 3.5 MeV, 3.8 MeV and 4.11 MeV proton (H+) ions at room temperature. The electrical conductivity of Ni-NWs networks was observed to increase with the increase in beam energies of H+ ions. With the increase in ions beam energies, electrical conductivity increases and this may be attributed to a reduction in wire-wire point contact resistance due to the irradiation-induced welding of NWs. Welding is probably initiated due to H+ ions-irradiation induced heating effect that also improved the crystalline quality of nanowires (NWs). After ion beam irradiation, localize heat is generated in nanowires due to ionization which was also verified by SRIM simulation. Optical transmittance is increased with increase in energy of H+ ions. The Ni-NWs networks subjected to an ion beam irradiation to observe corresponding changes in electrical conductivity and optical transparencies are promising for various nano-technological applications as highly transparent and conducting electrodes.

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Ion-beam irradiation and 244Cm-doping investigations of the radiation response of actinide-bearing crystalline waste forms

Journal of Materials Research ◽

10.1557/jmr.2015.23 ◽

2015 ◽

Vol 30 (9) ◽

pp. 1516-1528 ◽

Cited By ~ 3

Author(s):

Sergey V. Yudintsev ◽

Andrey A. Lizin ◽

Tatiana S. Livshits ◽

Sergey V. Stefanovsky ◽

Sergey V. Tomilin ◽

...

Keyword(s):

Ion Beam ◽

Radiation Response ◽

Beam Irradiation ◽

Ion Beam Irradiation ◽

Waste Forms ◽

Image Position

Abstract

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Создание функциональных наноструктур под действием ионного облучения

Журнал технической физики ◽

10.21883/jtf.2021.10.51367.138-21 ◽

2021 ◽

Vol 91 (10) ◽

pp. 1532

Author(s):

К.Е. Приходько ◽

М.М. Дементьева

Keyword(s):

Room Temperature ◽

Ion Beam ◽

Research Centre ◽

Aluminum Surface ◽

Beam Irradiation ◽

Kurchatov Institute ◽

Ion Beam Irradiation ◽

Insulating Layer ◽

Functional Nanostructures ◽

Oxygen Ions

The paper describes a method developed in National Research Centre “Kurchatov Institute” for creating different functional nanostructures using ion beam irradiation. As an example, the formation of an integrated resistive elements in a low-temperature NbN superconductor nanowire is demonstrated. The possibility of producing an insulating layer of aluminum oxide with a thickness of 15 nm on the aluminum surface at room temperature under 0.2 keV oxygen ions irradiation was shown.

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Studying Radiation Damage in Structural Materials by Using Ion Accelerators

Reviews of Accelerator Science and Technology ◽

10.1142/s1793626811000513 ◽

2011 ◽

Vol 04 (01) ◽

pp. 161-182 ◽

Cited By ~ 16

Author(s):

Peter Hosemann

Keyword(s):

Radiation Damage ◽

Large Scale ◽

Ion Beam ◽

Structural Materials ◽

Limiting Factor ◽

Particle Accelerators ◽

Beam Irradiation ◽

Ion Beam Irradiation ◽

Short Period ◽

Wide Range

Radiation damage in structural materials is of major concern and a limiting factor for a wide range of engineering and scientific applications, including nuclear power production, medical applications, or components for scientific radiation sources. The usefulness of these applications is largely limited by the damage a material can sustain in the extreme environments of radiation, temperature, stress, and fatigue, over long periods of time. Although a wide range of materials has been extensively studied in nuclear reactors and neutron spallation sources since the beginning of the nuclear age, ion beam irradiations using particle accelerators are a more cost-effective alternative to study radiation damage in materials in a rather short period of time, allowing researchers to gain fundamental insights into the damage processes and to estimate the property changes due to irradiation. However, the comparison of results gained from ion beam irradiation, large-scale neutron irradiation, and a variety of experimental setups is not straightforward, and several effects have to be taken into account. It is the intention of this article to introduce the reader to the basic phenomena taking place and to point out the differences between classic reactor irradiations and ion irradiations. It will also provide an assessment of how accelerator-based ion beam irradiation is used today to gain insight into the damage in structural materials for large-scale engineering applications.

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