JOPSS - Search Results

Oxidation and reduction behaviors of prototypic MgO-based inert matrix fuels (IMFs) containing PuO $_{2-x}$ were experimentally investigated by means of thermogravimetry. The oxidation and reduction kinetics of the MgO-PuO $_{2-x}$ specimen were determined. The oxidation and reduction rates of the MgO-PuO $_{2-x}$ were found to be low compared with those of PuO $_{2-x}$ . It is note that the changes in O/Pu ratios of MgO-PuO $_{2-x}$ from stoichiometry were smaller than those of PuO $_{2-x}$ at high oxygen partial pressure. From these results, it can be said that MgO matrix lower the oxygen supply and release of PuO $_{2-x}$ , which is preferable as the minor actinides incineration devices, since the high oxygen potentials of minor actinide oxides can cause certain problems in terms of thermochemical aspects such as enlarged cladding inner-surface corrosion.

Journal Articles

Effect of solute atoms on dislocation motion in Mg; An electronic structure perspective

Tsuru, Tomohito; Chrzan, D. C.*

Scientific Reports (Internet), 5, p.8793_1 - 8793_8, 2015/03

https://doi.org/10.1038/srep08793

Times Cited Count：77 Percentile：86.87(Multidisciplinary Sciences)

Much of the world's future economy hedges on the ability to improve the efficiency of mechanical machines without sacrificing their performance. This requires the development of lighter and stronger structural alloys. Magnesium alloys are very promising for structural applications, but they suffer from a fatal flaw. The mobility of the dislocations is determined by the bonding within the alloy, and this bonding is best modeled using approaches rooted firmly in quantum mechanics. Here, we compute the electronic structure of a screw dislocation gliding on a prismatic plane within Mg as it passes over its Peierls barrier. We show that the ductility of Mg is increased because some substitutional additions strongly bind to and stabilize a compact core structure for screw dislocations that are formally able to glide on both the basal and prismatic planes.

Journal Articles

Radiation-induced swelling and softening in magnesium aluminate spinel irradiated with high-flux Cu $^{-}$ ions

Lee, C. G.; Omura, Takahito*; Takeda, Yoshihiko*; Matsuoka, Saburo*; Kishimoto, Naoki*

Journal of Nuclear Materials, 326(2-3), p.211 - 216, 2004/03

https://doi.org/10.1016/j.jnucmat.2004.01.010

Times Cited Count：4 Percentile：28.55(Materials Science, Multidisciplinary)

Magnesium aluminate spinel of single crystal was irradiated with 60 keV Cu $^{-}$ at a dose rate up to 100 A/cm $^{2}$ , to a total dose of 310 $^{16}$ ions/cm $^{2}$ , in order to study changes in hardness and step-height swelling by high-flux implantation. Hardness determined by nano-indentation measurements steeply decreased with implantation. There is a strong negative correlation between dose-rate dependences of the hardness and the step-height swelling: the former decreases as the latter increases. The Rutherford Backscattering Spectrometry (RBS)/channeling measurements showed that the spinel is not completely amorphized over the dose-rate range in this study, and the radiation-induced softening observed is not due to amorphization. Results of optical absorbance suggested that radiation-induced point defects and their clusters on the anion sublattices of the spinel played an important role in the radiation-induced swelling under high-flux ion implantation.

Journal Articles

Post-irradiation examination of high burnup Mg doped UO $_{2}$ in comparison with undoped UO $_{2}$ , Mg-Nb doped UO $_{2}$ and Ti doped UO $_{2}$

Fujino, Takeo*; Shiratori, Tetsuo; Sato, Nobuaki*; Fukuda, Kosaku; Yamada, Kota*; Suzuki, Yasufumi; Serizawa, Hiroyuki

Journal of Nuclear Materials, 297(2), p.176 - 205, 2001/08

https://doi.org/10.1016/S0022-3115(01)00609-2

Times Cited Count：24 Percentile：82.38(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Oxygen potential and defect structure of the solid solution, Mg-Gd-UO $_{2}$

Fujino, Takeo*; Sato, Nobuaki*; Yamada, Kota*; Okazaki, Manabu*; Fukuda, Kosaku; Serizawa, Hiroyuki; Shiratori, Tetsuo*

Journal of Nuclear Materials, 289(3), p.270 - 280, 2001/03

https://doi.org/10.1016/S0022-3115(01)00427-5

Times Cited Count：2 Percentile：19.14(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Interstitial fluorine centers in the neutron-irradiated MgF $_{2}$

Kazumata, Y.; ;

Solid State Communications, 19(3), p.181 - 183, 1976/03

https://doi.org/10.1016/0038-1098(76)90845-0

Times Cited Count：4

no abstracts in English

Journal Articles

Neutron Irradiation Hardening in Aluminum-Magnesium Alloys

Trans.JIM, 11(6), p.440 - 441, 1970/00

no abstracts in English

Oral presentation

Characterization of internal stresses in Mg-Zn-Y alloy with multimodal microstructure by deformation operando neutron diffraction

Harjo, S.; Gong, W.; Yamasaki, Michiaki*; Kawasaki, Takuro; Aizawa, Kazuya

no journal, ,

Oral presentation

Improvement of both elongation and strength of magnesium alloy consisting long period stacking ordered phase by hot-extrusion

Harjo, S.; Aizawa, Kazuya; Gong, W.; Yamasaki, Michiaki*; Kawasaki, Takuro

no journal, ,

Oral presentation

Multi-component neutron diffraction analysis of hetero-structured metallic materials

Harjo, S.; Gong, W.; Kawasaki, Takuro; Tomota, Yo*; Ungr, T.*; Yamasaki, Michiaki*

no journal, ,

Oral presentation

Neutron diffraction analysis method to elucidate deformation mechanisms of metals with multimodal-structures and -deformation modes

Harjo, S.; Gong, W.; Kawasaki, Takuro; Mao, W.; Yamasaki, Michiaki*

no journal, ,

Oral presentation

Cyclic tension-compression in situ neutron diffraction of extruded LPSO typed magnesium alloys

Harjo, S.; Gong, W.; Kawasaki, Takuro; Aizawa, Kazuya; Yamasaki, Michiaki*

no journal, ,

Oral presentation

Use of NaH $_{2}$ PO $_{4}$ and (NaPO $_{3}$ ) $_{n}$ as a phosphate source for development of magnesium phosphate cements

Garca-Lodeiro, I.*; Kai Wuen, O.*; Irisawa, Keita; Nakazawa, Osamu; Kinoshita, Hajime*

no journal, ,

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Deformation behavior of individual constituent phases and components in multimodal magnesium alloys

Stress evaluation using multi-peaks

Mechanism of strength increase in high-strength magnesium alloys elucidated by in-situ pulsed neutron diffraction experiments

Stress evaluation method by neutron diffraction for HCP-structured magnesium alloy

Effect of extrusion ratio in hot-extrusion on kink deformation during compressive deformation in an Mg/LPSO dual-phase magnesium alloy monitored by neutron diffraction

Effect of magnesium silicate hydrate (M-S-H) formation on the local atomic arrangements and mechanical properties of calcium silicate hydrate (C-S-H); In situ X-ray scattering study

A Novel method to improve methane generation from waste sludge using iron nanoparticles coated with magnesium hydroxide

Neutron imaging analysis of hydrogen content in pure palladium and aluminum alloys

Oxidation and reduction behaviors of a prototypic MgO-PuO $_{2-x}$ inert matrix fuel

Effect of solute atoms on dislocation motion in Mg; An electronic structure perspective

Radiation-induced swelling and softening in magnesium aluminate spinel irradiated with high-flux Cu $^{-}$ ions

Post-irradiation examination of high burnup Mg doped UO $_{2}$ in comparison with undoped UO $_{2}$ , Mg-Nb doped UO $_{2}$ and Ti doped UO $_{2}$

Oxygen potential and defect structure of the solid solution, Mg-Gd-UO $_{2}$

Interstitial fluorine centers in the neutron-irradiated MgF $_{2}$

Neutron Irradiation Hardening in Aluminum-Magnesium Alloys

Characterization of internal stresses in Mg-Zn-Y alloy with multimodal microstructure by deformation operando neutron diffraction

Improvement of both elongation and strength of magnesium alloy consisting long period stacking ordered phase by hot-extrusion

Multi-component neutron diffraction analysis of hetero-structured metallic materials

Neutron diffraction analysis method to elucidate deformation mechanisms of metals with multimodal-structures and -deformation modes

Cyclic tension-compression in situ neutron diffraction of extruded LPSO typed magnesium alloys

Use of NaH $_{2}$ PO $_{4}$ and (NaPO $_{3}$ ) $_{n}$ as a phosphate source for development of magnesium phosphate cements