Design of radiation resistant metallic multilayers for advanced nuclear systems

Zhernenkov, Mikhail; Gill, Simerjeet K.; Stanić, Vesna; DiMasi, Elaine; Kisslinger, Kim; Baldwin, J. Kevin; Misra, Amit; Demkowicz, Michael J.; Ecker, Lynne

doi:10.1063/1.4883481

Cited by 34 publications

(22 citation statements)

References 27 publications

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“…The Pt-Cr interface roughness was found to be 7.5 Å, while the Cr-Si interface roughness was 4.5 Å. Although the multilayer system used in the experiment was an X-ray optical element prepared under the controlled environment, we note that similar interface qualities are often found in non-X-ray optical metallic multilayer systems such as those used in nuclear reactor coatings3233.…”

Section: Resultsmentioning

confidence: 67%

Surface studies of solids using integral X-ray-induced photoemission yield

Stoupin¹,

Zhernenkov²,

Shi³

2016

Sci Rep

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X-ray induced photoemission yield contains structural information complementary to that provided by X-ray Fresnel reflectivity, which presents an advantage to a wide variety of surface studies if this information is made easily accessible. Photoemission in materials research is commonly acknowledged as a method with a probing depth limited by the escape depth of the photoelectrons. Here we show that the integral hard-X-ray-induced photoemission yield is modulated by the Fresnel reflectivity of a multilayer structure and carries structural information that extends well beyond the photoelectron escape depth. A simple electric self-detection of the integral photoemission yield and Fourier data analysis permit extraction of thicknesses of individual layers. The approach does not require detection of the reflected radiation and can be considered as a framework for non-invasive evaluation of buried layers with hard X-rays under grazing incidence.

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Section: Resultsmentioning

confidence: 67%

Surface studies of solids using integral X-ray-induced photoemission yield

Stoupin¹,

Zhernenkov²,

Shi³

2016

Sci Rep

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“…Nanostructured metals should be advantageous for this purpose, as their high densities of grain boundaries and interphase boundaries can trap large amounts of He and thus suppress bubble nucleation [6][7][8][9]. Ultrafine-grained single phase materials have been shown to trap helium at grain boundaries, but they are not particularly efficient and can coarsen at high temperatures or during irradiation [10][11][12][13].…”

Section: Introductionmentioning

confidence: 98%

“…Owing to their complexity, however, they are not suitable for elucidating the relationship between interface structure and He trapping. Interphase boundaries between immiscible metals with semi-coherent interfaces, such as in Cu-Nb [17,18], Cu-V [19,20], Cu-Fe [21], and Ag-V [22], are more appropriate for this latter purpose as they are good defect sinks, are stable under irradiation, and their interface structures can be controllably varied, characterized, and modelled [6,[23][24][25]. Previous research on Cu-Nb and Cu-V produced by physical vapor deposition (PVD) has indeed shown that the Kurdjumov-Sachs (KS) orientation relationship with a dominant (111)FCC||(110)BCC interface habit plane, often referred to as (111)KS, effectively suppresses He-filled bubble formation.…”

Section: Introductionmentioning

confidence: 99%

Role of interfaces on the trapping of He in 2D and 3D Cu–Nb nanocomposites

Ekiz

Averback

Mara

et al. 2015

Journal of Nuclear Materials

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The role of interface structure on the trapping of He in Cu-Nb nanocomposites was investigated by comparing He bubble formation in nano-multilayers grown by PVD, nanolaminates fabricated by accumulative roll bonding (ARB), and 3D nanocomposites obtained by high pressure torsion (HPT). All samples were implanted with 1 MeV He ions at room temperature and characterized by cross section transmission electron microscopy (TEM). The critical He concentration leading to bubble formation was determined by correlating the He bubble depth distribution detected by TEM with the implanted He depth profile obtained by SRIM. The critical He dose per unit interfacial area for bubble formation was largest for the PVD multilayers, lower by a factor of ~1.4 in the HPT nanocomposites annealed at 500 ˚C, and lower by a factor of ~4.6 in the ARB nanolaminates relative to the PVD multilayers. The results indicate that the (111)FCC||(110)BCC Kurdjumov-Sachs (KS) interfaces predominant in PVD and annealed HPT samples provide more effective traps than the (112)KS interfaces predominant in ARB nanolaminates; however, the good trapping efficiency and high interface area of 3D HPT structures make them most attractive for applications.

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“…However, investigations of this effect are limited by the difficulty of characterizing He precipitates at internal interfaces. NR (and XRR) provides a distinct advantage within this context: its sensitivity to local density changes enables detection of the onset of He precipitate formation [42,65,66].…”

Section: He In Fcc/bcc Composites: Detecting Density Changesmentioning

confidence: 99%

Probing Interfaces in Metals Using Neutron Reflectometry

Demkowicz

Majewski

2016

Metals

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Solid-state interfaces play a major role in a variety of material properties. They are especially important in determining the behavior of nano-structured materials, such as metallic multilayers. However, interface structure and properties remain poorly understood, in part because the experimental toolbox for characterizing them is limited. Neutron reflectometry (NR) offers unique opportunities for studying interfaces in metals due to the high penetration depth of neutrons and the non-monotonic dependence of their scattering cross-sections on atomic numbers. We review the basic physics of NR and outline the advantages that this method offers for investigating interface behavior in metals, especially under extreme environments. We then present several example NR studies to illustrate these advantages and discuss avenues for expanding the use of NR within the metals community.

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Design of radiation resistant metallic multilayers for advanced nuclear systems

Abstract: Articles you may be interested inFocused helium and neon ion beam induced etching for advanced extreme ultraviolet lithography mask repair

Cited by 34 publications

References 27 publications

Surface studies of solids using integral X-ray-induced photoemission yield

Surface studies of solids using integral X-ray-induced photoemission yield

Role of interfaces on the trapping of He in 2D and 3D Cu–Nb nanocomposites

Probing Interfaces in Metals Using Neutron Reflectometry

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