Sintering and characterization of ZrN and (Dy,Zr)N as surrogate materials for fast reactor nitride fuel

Pukari, Merja; Takano, Masahide

doi:10.1016/j.jnucmat.2013.09.001

Cited by 12 publications

(6 citation statements)

References 20 publications

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“…Dysprosium nitride (used as a U/MA surrogate) and zirconium nitride composites have been fabricated by Pukari and Takano 29 by the hydrogenation-nitridation of Dy and Zr metal ingots. Oxygen concentrations up to 1.2 wt-% were added using ZrO 2 or by increasing milling times to deliberately increase O content as to assess the effect on the processing of these materials.…”

Section: Sinteringmentioning

confidence: 99%

“…Oxygen concentrations up to 1.2 wt-% were added using ZrO 2 or by increasing milling times to deliberately increase O content as to assess the effect on the processing of these materials. Powders were pressed into green bodies at 300 MPa and then pressureless sintered at 1923 or 1973 K for 6 h. Pukari and Takano 29 conclude that oxygen content that has dissolved into the nitride phase increases the achievable densities of ZrN and (Dy,Zr)N. Densities of ZrN increased from 89.6 to 91.6 TD for 0.20 and 0.8 wt-% O respectively, and (Dy,Zr)N increased from 93.1 to 94.5 TD for 0.26 and 0.59 wt-% O respectively. However, no error ranges on the density measurements are given and only geometrical densities are reported, and these details would be necessary to asses the significance of these changes.…”

Section: Non-oxide Processingmentioning

confidence: 99%

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Processing and properties of ZrC, ZrN and ZrCN ceramics: a review

Harrison

Lee

2016

Advances in Applied Ceramics

182

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ZrC and ZrN ceramics are of interest in the application of materials in extreme high temperature environments, particularly for nuclear applications in generation IV reactors. These materials demonstrate desirable characteristics such as high thermal and electrical conductivities along with high hardness and melting temperatures. Data reported in the literature often suffer from scatter due to differences in processing techniques and difficulty determining stoichiometry, which will significantly affect thermophysical properties. This article reviews the current available data for the properties of ZrC, ZrN and mixed carbonitrides phases and identifies causes of scatter in the literature and areas requiring further research.

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Section: Sinteringmentioning

confidence: 99%

Section: Non-oxide Processingmentioning

confidence: 99%

Processing and properties of ZrC, ZrN and ZrCN ceramics: a review

Harrison

Lee

2016

Advances in Applied Ceramics

182

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“…Particularly, based on its low neutron capture cross-section and good chemical compatibility with actinides, zirconium nitride is an important material used as ceramic matrix of inert matrix fuel (IMF) to transmute long-lived actinides and as advanced fuel particle coatings 19–21 . Moreover, it is a surrogate for uranium nitride in order to optimize the process parameters for nitride fuel fabrication, which is being considered for application in space power reactors 22 and advanced accident-tolerant fuels for nuclear reactors 23,24 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Zirconium Nitride Nanopowders by Internal Gelation and Carbothermic Nitridation

Zhao

et al. 2019

Sci Rep

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Zirconium compounds has been widely attention over the last decades due to its excellent physical and chemical properties. Zirconium nitride nanopowders were synthesized via a simple direct carbothermic nitridation process of internal gel derived zirconia in the presence of nano-sized carbon black. The effects of reaction temperature, dwell time and molar ratio of carbon black to Zr (C/Zr) on the phase composition, grain size and crystal parameters of products were studied. Based upon the analysis of crystallite phase evolution and microstructure characterization, it was found that zirconium oxynitride is intermediate product and then O atoms in oxynitride were extracted by oxygen getter, carbon black. Anion sites were directly replaced by N atoms to form rock-salt type nitride in carbothermic nitridation process.

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“…On the other hand, chemical approaches can be cost‐effective and adaptable for producing a wide range of metal nitrides especially as powders 11 . For example, direct nitriding of Zr metal, 12 reactive ball‐milling, 13 and Li 3 N‐mediated reaction with ZrCl 4 14 have been used for synthesizing ZrN powder. However, some of the precursors used above (Zr metal powder, Li 3 N, and NH 3 ) are hazardous or have severe safety concerns 15,16 …”

Section: Introductionmentioning

confidence: 99%

Synthesis and flash sintering of zirconium nitride powder

et al. 2022

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Zirconium nitride (ZrN) is a transition metal nitride of great interest due to its excellent physical and chemical properties. This study aims to synthesize ZrN fine powders by a facile and low‐cost urea route that avoids the use of any solvent. ZrCl4 and urea mixtures were heat‐treated at up to 1600˚C in nitrogen gas. The products were characterized by X‐ray diffraction, scanning electron microscopy, transmission electron microscopy, energy‐dispersive X‐ray spectroscopy, and thermogravimetric analysis. The effects of different processing parameters such as metal to urea molar ratio, heat treatment temperature, and dwelling time on the product phase and stoichiometry were studied to understand the synthesis method. In addition, synthesized ZrN powder was consolidated into near fully dense single‐phase bulk ceramic with a homemade flash sintering setup. A constant DC electrical field of ∼80 V/cm and pressure of ∼14 MPa at room temperature triggered flash sintering without pre‐heating, and the entire process finished in 200 s. The composition, microstructure, density, hardness, and oxidation properties of the sintered pellet were also characterized.

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Sintering and characterization of ZrN and (Dy,Zr)N as surrogate materials for fast reactor nitride fuel

Cited by 12 publications

References 20 publications

Processing and properties of ZrC, ZrN and ZrCN ceramics: a review

Processing and properties of ZrC, ZrN and ZrCN ceramics: a review

Synthesis and Characterization of Zirconium Nitride Nanopowders by Internal Gelation and Carbothermic Nitridation

Synthesis and flash sintering of zirconium nitride powder

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