3He bubble evolution in ErT2: A survey of experimental results

Snow, Clark Sheldon; Browning, James F.; Bond, G.M.; Rodriguez, Mark A.; Knapp, J. A.

doi:10.1016/j.jnucmat.2014.07.032

Cited by 20 publications

(11 citation statements)

References 63 publications

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“…Helium is insoluble in most materials and precipitates out of the matrix to form clusters and bubbles when the helium concentration is sufficiently high [ 2 , 3 , 4 ]. Helium agglomerates usually assume an over-pressurized spherical morphology in metal systems but can link to form platelets or other morphologies in some cases [ 5 , 6 , 7 , 8 ]. The addition of He often causes mechanical property degradation in materials [ 2 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Helium Bubbles and Blistering in a Nanolayered Metal/Hydride Composite

et al. 2021

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Helium is insoluble in most metals and precipitates out to form nanoscale bubbles when the concentration is greater than 1 at.%, which can alter the material properties. Introducing controlled defects such as multilayer interfaces may offer some level of helium bubble management. This study investigates the effects of multilayered composites on helium behavior in ion-implanted, multilayered ErD2/Mo thin film composites. Following in-situ and ex-situ helium implantation, scanning and transmission electron microscopy showed the development of spherical helium bubbles within the matrix, but primarily at the layer interfaces. Bubble linkage and surface blistering is observed after high fluence ex-situ helium implantation. These results show the ability of metallic multilayers to alter helium bubble distributions even in the presence of a hydride layer, increasing the lifetime of materials in helium environments.

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Section: Introductionmentioning

confidence: 99%

Helium Bubbles and Blistering in a Nanolayered Metal/Hydride Composite

et al. 2021

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“…Thus, the design of new substrates for high quality Ti film growth is in demand. Single crystal Si is a candidate substrate material due to its properties of high thermal and electrical conductivity [5,11,41]. However, the chemical reaction between Ti and Si to form a Ti-Si complex at high substrate temperature restricts its application [42,43].…”

Section: Introductionmentioning

confidence: 99%

Effect of Thickness of Molybdenum Nano-Interlayer on Cohesion between Molybdenum/Titanium Multilayer Film and Silicon Substrate

et al. 2019

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Titanium (Ti) film has been used as a hydrogen storage material. The effect of the thickness of a molybdenum (Mo) nano-interlayer on the cohesive strength between a Mo/Ti multilayer film and a single crystal silicon (Si) substrate was investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and nano-indenter. Four groups of Si/Mo/Ti multilayer films with different thicknesses of Mo and Ti films were fabricated. The XRD results showed that the introduction of the Mo layer suppressed the chemical reaction between the Ti film and Si substrate. The nano-indenter scratch results demonstrated that the cohesion between the Mo/Ti film and Si substrate decreased significantly with increasing Mo interlayer thickness. The XRD stress analysis indicated that the residual stress in the Si/Mo/Ti film was in-plane tensile stress which might be due to the lattice expansion at a high film growth temperature of 700 °C and the discrepancy of the thermal expansion coefficient between the Ti film and Si substrate. The tensile stress in the Si/Mo/Ti film decreased with increasing Mo interlayer thickness. During the cooling of the Si substrate, a greater decrease in tensile stress occurred for the thicker Mo interlayer sample, which became the driving force for reducing the cohesion between the Mo/Ti film and Si substrate. The results confirmed that the design of the Mo interlayer played an important role in the quality of the Ti film grown on Si substrate.

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“…Erbium is a vital candidate material for tritium storage in solid phase [1], due to its higher thermal stability of its tritide and better accommodation ability for helium atoms generated by the decay of tritium [2]. The He bubble evolution-induced mechanical property degradation impedes its application in the field of nuclear industry.…”

Section: Introductionmentioning

confidence: 99%

“…The nucleation, growing, and interacting of helium bubbles in the metal matrix attract much attention from investigators [8,9]. Snow et al [2] systematically studied the mechanism of 3 He bubble growth by transmission electron microscopy (TEM) with the aging of Er tritide up to the 3 He content of 0.37. It was found that the He bubbles grow as Griffith cracks [10] until the 3 He content of ~0.15, while the bubbles grow in thickness by punching dislocation dipoles with further aging [2,6].…”

Section: Introductionmentioning

confidence: 99%

“…Snow et al [2] systematically studied the mechanism of 3 He bubble growth by transmission electron microscopy (TEM) with the aging of Er tritide up to the 3 He content of 0.37. It was found that the He bubbles grow as Griffith cracks [10] until the 3 He content of ~0.15, while the bubbles grow in thickness by punching dislocation dipoles with further aging [2,6]. Shen et al [11] and Bufford et al [12] investigated the microstructure changes of Er and Er deuteride under He ion implantation and found that the He implantation induced the severe lattice expansion for (200) crystal plane.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Embedded Helium on the Microstructure and Mechanical Properties of Erbium Films

Shen

Shi

et al. 2019

Nanomaterials

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A series of helium (He) charged nanograin-sized erbium (Er) films were deposited by direct current (DC)-magnetron sputtering with different He/Ar mixture gases. The microstructure and mechanical properties of He-charged Er films were investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), and nanoindentation. The helium concentrations in Er films, determined by elastic recoil detection analysis (ERDA), ranged from 0 to 49.6%, with the increase in He:Ar flow ratio up to 18:1. The XRD results show that the grain sizes of Er films decreased with and increase in He content. The embedded He atoms induced the formation of spherical nanometer He bubbles, and the diameter of the He bubbles increased with the He content. The hardness and Young’s modulus increased and decreased with the decreasing grain sizes of polycrystalline Er–He films. The mechanisms of mechanical properties with respect to the grain size and He content were discussed based on the Hall–Petch formula and composite spheres model.

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3He bubble evolution in ErT2: A survey of experimental results

Cited by 20 publications

References 63 publications

Helium Bubbles and Blistering in a Nanolayered Metal/Hydride Composite

Helium Bubbles and Blistering in a Nanolayered Metal/Hydride Composite

Effect of Thickness of Molybdenum Nano-Interlayer on Cohesion between Molybdenum/Titanium Multilayer Film and Silicon Substrate

Effects of Embedded Helium on the Microstructure and Mechanical Properties of Erbium Films

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