Oxygen solubility in dysprosium mononitride prepared by carbothermic synthesis

Takano, Masahide; Itoh, Akinori; Akabori, Mitsuo; Ogawa, Teiichiro

doi:10.1016/s0925-8388(01)01443-8

Cited by 17 publications

(25 citation statements)

References 9 publications

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“…The high vapor pressure of DyN is the primary reason that it has been chosen for these studies. In accordance with the literature review, authors have shown that the electrochemical properties, vaporization behaviors, and nitriding behaviors of DyN and AmN are similar [6,8,30,[45][46][47]. Unfortunately, not all properties for these two materials can be obtained in the reviewed literature in order to make a more complete comparison.…”

Section: Surrogate Fuelsmentioning

confidence: 79%

“…However, surrogates for actinide nitrides have primarily been considered since the late 1980's when renewed interests in nitride fuels were invoked with the SP-100 space nuclear program and the succeeding (advanced accelerator applications) AAA, AFCI, and GNEP programs [2,5,6,8,30,[43][44][45][46][47][48]. With this timeframe in mind, the effects of nitride surrogates on sintering are inadequately understood because they have been studied less than the other fuels forms.…”

Section: Surrogate Fuelsmentioning

confidence: 99%

“…As mentioned in previous sections, DyN has been identified in this work to serve as a surrogate for AmN in the fabrication of the transmutation fuels [6,8,30,[45][46][47]. After a detailed literature review, the earliest noted documentation found on the synthesis of DyN was in 1993 by Fitzmaurice, et [6,8,46,47]. A brief review of these routes is presented in the following text.…”

Section: Synthesis Of Dysprosium Mononitride (Dyn)mentioning

confidence: 99%

“…Nearly a decade later, Takano, et al [47] synthesized DyN via a carbothermic reduction and subsequent nitridation. Dysprosium oxide (Dy 2 O 3 , 99.9% pure) was combined with graphite at various molar ratios and ground with a mortar and pestle prior to being cold-pressed into to small disks.…”

Section: Synthesis Of Dysprosium Mononitride (Dyn)mentioning

confidence: 99%

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Synthesis and Optimization of the Sintering Kinetics of Actinide Nitrides

Butt¹,

Jaques²

2009

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Section: Surrogate Fuelsmentioning

confidence: 79%

Section: Surrogate Fuelsmentioning

confidence: 99%

Section: Synthesis Of Dysprosium Mononitride (Dyn)mentioning

confidence: 99%

Section: Synthesis Of Dysprosium Mononitride (Dyn)mentioning

confidence: 99%

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Synthesis and Optimization of the Sintering Kinetics of Actinide Nitrides

Butt¹,

Jaques²

2009

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“…will be dominated by the f -orbitals and, while the cubic set generally dominates, the overall 14: Half-slipped planes on the major slip systems for NaCl [34] chemistry is different from that of a transition metal [48,49,50,51,5]. Much more information has been acquired on the the actinide carbides.…”

Section: Transuranic Nitrides (Tru-n)mentioning

confidence: 99%

Radiation Damage and Fission Product Release in Zirconium Nitride

Egeland

2005

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Zirconium nitride is a material of interest to the AFCI program due to some of its particular properties, such as its high melting point, strength and thermal conductivity. It is to be used as an inert matrix or diluent with a nuclear fuel based on transuranics. As such, it must sustain not only high temperatures, but also continuous irradiation from fission and decay products. This study addresses the issues of irradiation damage and fission product retention in zirconium nitride through an assessment of defects that are produced, how they react, and how predictions can be made as to the overall lifespan of the complete nuclear fuel package.Ion irradiation experiments are a standard method for producing radiation damage to a surface for observation. Cryogenic irradiations are performed to produce the maximum accumulation of defects, while elevated temperature irradiations may be used to allow defects to migrate and react to form clusters and loops. Cross-sectional transmission electron microscopy and grazing-incidence x-ray diffractometry were used in evaluating the effects that irradiation has on the crystal structure and microstructure of the material. Other techniques were employed to evaluate physical effects, such as nanoindentation and helium release measurements.Results of the irradiations showed that, at cryogenic temperatures, ZrN withstood over 200 displacements per atom without amorphization. No significant change to the lattice or microstructure was observed. At elevated temperatures, the large amount of damage showed mobility, but did not anneal significantly. Defect clustering was possibly observed, yet the size was too small to evaluate, and bubble formation was not observed.Defects, specifically nitrogen vacancies, affect the mechanical behavior of ZrN dramatically. Current and previous work on dislocations shows a distinct change in slip plane, which is evidence of the bonding characteristics. The stacking-fault energy changes dramatically with lowered nitrogen stoichiometry, resulting in widely spaced partial dislocations in ZrN with high nitrogen vacancy concentration.The wide range of nitrogen stoichiometry in the phase field shows that ZrN may accept nitrogen defects readily. Explanations for this are suggested based upon the bonding structure of these cubic nitrides. This structure allows for a solid framework to remain on one sublattice, while at the same time allowing defects on the other sublattice. This allowance for defects allows significant damage from irradiation yet also decreases the drive for cluster growth. This is evidence that the structure will be acceptable for long-term use as a nuclear reactor fuel.

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Optical and magnetic properties of the DyN/GaN superlattice

Zhou¹,

Kim

Teraguchi³

et al. 2003

Physica Status Solidi (b)

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Ferromagnet/semiconductor DyN/GaN superlattice structures were grown on SiC substrate by radio frequency molecular beam epitaxy. Formation of DyN was confirmed by X‐ray diffraction measurements. The temperature dependence of the photoluminescence (PL) spectra for the DyN/GaN superlattice and GaDyN samples was studied. Sharp PL peaks from two samples showed no shift with temperature, indicating the intra‐atomic f–f transition at Dy ions. Comparison of the PL spectra for the DyN/GaN superlattice and GaDyN suggests that GaDyN is formed at the GaN/DyN interface. The DyN/GaN superlattice exhibited two ferromagnetic components; one is major at low temperatures (<50 K) and the other is major at high temperatures (>350 K). The former shows large coercivity Hc of about 1800 Oe at 7 K, which was originated from DyN layers. The latter may come from GaDyN, which was formed at the GaN/DyN interface. (© 2003 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Oxygen solubility in dysprosium mononitride prepared by carbothermic synthesis

Cited by 17 publications

References 9 publications

Synthesis and Optimization of the Sintering Kinetics of Actinide Nitrides

Synthesis and Optimization of the Sintering Kinetics of Actinide Nitrides

Radiation Damage and Fission Product Release in Zirconium Nitride

Optical and magnetic properties of the DyN/GaN superlattice

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