2023-09-15 08:00 |
[IMPULSE-2023-00177]
Journal Article
Gómez, A. G. ; Ponce, J. P. ; Grosse, M. ; et al
Evaluation of the delayed hydrogen cracking behavior and the hydrogen diffusion coefficient for different microstructures of the Zr-2.5%Nb alloy
The susceptibility of delayed hydride cracking (DHC) in the Zr-2.5%Nb alloy was evaluated in six microstructures produced from an extruded tube of Zr-2.5%Nb, which underwent different thermomechanical treatments, divided into two separate groups: Low temperature samples (LT) were heat-treated below the monotectoid temperature in the α-Zr + β-Nb field, and included pressure tube sample of CANDU-type material obtained through two different cold deformation methods, rolling and drawing, and stress-relieved at 400 °C for 24 h, and heat-treated samples at 600 °C/4 h. High-temperature samples (HT) were heat-treated in the β-Zr field at 900 °C/3 h, and two different cooling sequences up to room temperature.The increase in the ultimate tensile strength (UTS) and hardness due to metallurgical processing in LT materials made them more susceptible to DHC, reducing the stress intensity, KIH, from 11.8 to 8.5 MPa m0.5, together with an increase in crack propagation velocity from 1.6 10−8 to 4.5 10−8 m/s.In situ hydrogen diffusion experiments were performed at ANTARES, the cold neutron imaging facility at the FRM-2 reactor, on LT materials. [...]
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2023-09-13 08:36 |
[IMPULSE-2023-00175]
Journal Article
Hu, N. ; Hong, B. ; Yan, X. ; et al
Hybrid Hydrogel-Based Skin Health Monitor for Tracing Solar UV Radiation in Aqueous Environments
Inspired by the Chinese wood oil coating on umbrella, an ionic polymer layer is coated onto hybrid hydrogels to realize monitoring of the solar ultraviolet (UV) radiation dose in aqueous environments. The hybrid hydrogels are synthesized by introducing the photocatalyst graphitic-carbon nitride (g-C3N4) nanosheets into the radically polymerized hydrogels from the monomer di(ethylene glycol) methyl ether methacrylate (MA) and oligo(ethylene glycol) methyl ether methacrylate (MA300). [...]
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2023-08-30 11:28 |
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2023-08-25 08:15 |
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2023-08-25 08:15 |
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2023-08-24 12:12 |
[IMPULSE-2023-00170]
Journal Article
Antropov, N. O. ; Kravtsov, E. A.
Neutron Reflectometry in Superlattices with Strongly Absorbing Rare-Earth Metals (Gd, Dy)
Polarized neutron reflectometry is used to study Dy/Gd superlattices with different ratios of Dy- and Gd-layer thicknesses: 1 : 1, 2 : 1, and 3 : 1. It is experimentally shown that the formation of helicoidal magnetic ordering in Dy layers with a period incommensurate with that of the superlattice manifests itself in the appearance of a magnetic-superlattice reflection, which is forbidden due to equality of the thicknesses of alternating Dy and Gd layers with a ratio of 1 : 1. [...]
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2023-08-22 11:27 |
[IMPULSE-2023-00168]
Journal Article
Antropov, N. O. ; Kravtsov, E. A.
Neutron Reflectometry in Superlattices with Strongly Absorbing Rare-Earth Metals (Gd, Dy)
Polarized neutron reflectometry is used to study Dy/Gd superlattices with different ratios of Dy- and Gd-layer thicknesses: 1 : 1, 2 : 1, and 3 : 1. It is experimentally shown that the formation of helicoidal magnetic ordering in Dy layers with a period incommensurate with that of the superlattice manifests itself in the appearance of a magnetic-superlattice reflection, which is forbidden due to equality of the thicknesses of alternating Dy and Gd layers with a ratio of 1 : 1. [...]
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2023-08-21 17:27 |
[IMPULSE-2023-00167]
Journal Article
Huang, J. ; Xiao, X. ; Liu, C. ; et al
Exchange coupling due to spin-imbalance in Er magnetic sublattice within Er/Tb multilayers
Topologically stable spin spiral structures in rare-earth (RE) can form the basis of realizing all-spin-based technology as strong exchange coupling has been reported earlier at the ferromagnet (FM)–RE or RE–RE interfaces around the temperature range where both layers are essentially ferromagnetic. Owing to the small number of irreversible spins in the non-collinear configuration within the RE layer, very weak coupling is rendered around the temperature range of the helical phase. [...]
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2023-08-20 11:28 |
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2023-08-18 12:33 |
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