Structure and oxidation properties of CeN thin films prepared by DC reactive magnetron sputtering

Wan, Yizao; Yi, Taimin; Fu, Yajun; Fu, Zheng; Yang, Mingshun; He, Zhibing; Cao, Linhong

doi:10.1016/j.surfcoat.2019.125168

Cited by 3 publications

(3 citation statements)

References 28 publications

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“…The sintered CeN pellets exhibit uniform microstructure with no visible pores and contain no more than 6 mol% (this value could be even lower as the sample surface could be oxidized during the XRD measurement) CeO 2 , which is an oxidation product of CeN. No other phases, such as Ce 2 O 3 , were detected by XRD because the final product of oxidation in CeN is CeO 2 [28]. Additionally, the conditions in the system only allowed for CeO 2 to form as the final product (for example, a reducing agent would be needed to form Ce 2 O 3 from CeO 2 [31]).…”

Section: Oxidation Effectmentioning

confidence: 99%

“…Cerium oxide (CeO 2 ) has been commonly used as a surrogate for UO 2 due to the similarity of chemical properties between Ce and U [25][26][27]. The oxidation properties between CeN and UN differ in that the former is far more oxygensensitive [28] than the latter. A density greater than 95%TD would indicate the pellet is densified enough to serve as a fuel pellet [1].…”

Section: Introductionmentioning

confidence: 99%

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A Rapid Sintering Method for Cerium Nitride Pellet: A Uranium Mononitride Surrogate

Joyce

2022

Ceramics

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Uranium mononitride (UN) is a candidate fuel material for light water reactors with higher uranium (U) loading and thermal conductivity than uranium dioxide (UO2). However, the sintering of UN pellets is challenging as the UN powder particles oxidize rapidly at high temperatures unless the oxygen concentration is extremely low. Oxidation during sintering either reduces the relative density of the sintered UN pellet or disintegrates the sintered UN pellet to powder. To address this problem, the present work developed a rapid sintering method for producing highly densified UN surrogate pellets with minimal oxidation. Cerium nitride (CeN) is used as a surrogate for UN to reduce radiation hazards. With the custom-developed fast-heating system, the sintering process was completed within 150 s. The sintering atmosphere was flowing nitrogen (N2). The sintered CeN pellet density was 95% of the theoretical density (TD) or higher. The microstructure was uniform with a 10–25 µm grain size as demonstrated by scanning electron microscopy (SEM) and contained trivial levels of oxides as demonstrated by X-ray diffraction (XRD). The resultant pellets indicate that the rapid sintering method is a promising method to make UN fuel pellets with equivalent or higher density to pellets made by conventional sintering methods, while also being more efficient in time and costs.

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Section: Oxidation Effectmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Rapid Sintering Method for Cerium Nitride Pellet: A Uranium Mononitride Surrogate

Joyce

2022

Ceramics

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“…15,16 As a popular technique of physical vapor deposition (PVD), magnetron sputtering (MS) is widely utilized to deposit a lot of materials (specifically nitride coatings). [17][18][19][20][21][22] This technique is utilized for increasing the deposition rate. 23,24 Tantalum nitride coating was applied on steel by MS.…”

Section: Introductionmentioning

confidence: 99%

Studying the in vitro corrosion response of nanostructured TaN coatings in Hank's physiological solution

Babaei

Fattah‐alhosseini

Elmkhah

et al. 2021

Int J Applied Ceramic Tech

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The goal of this research is to determine the effect of N 2 pressure to argon pressure on the microstructural analysis and corrosion behavior of nanostructured TaN deposited coatings using a reactive DC-magnetron sputtering (RDCMS) technique.The samples coated microstructure was studied by the X-ray diffraction (XRD) and scanning electron microscope (SEM), and elemental distribution was studied using energy-dispersive X-ray spectroscopy (EDS). To investigate the corrosion behavior of nanostructured TaN coatings, the potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) tests were performed in Hank's physiological solution. The results of different tests revealed that the coating with a content of 17.6% P N2 /P Ar consisted of hexagonal and orthorhombic TaN phases and had denser microstructure and free pores. This coating showed superior corrosion behavior in comparison to the other ones. Also, the corrosion resistance of this coating raised by increasing the time of immersion from 48 to 168 h.

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Surface characterization and electrochemical properties of tantalum nitride (TaN) nanostructured coatings produced by reactive DC magnetron sputtering

Babaei

Fattah‐alhosseini

Elmkhah

et al. 2020

Surfaces and Interfaces

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Structure and oxidation properties of CeN thin films prepared by DC reactive magnetron sputtering

Cited by 3 publications

References 28 publications

A Rapid Sintering Method for Cerium Nitride Pellet: A Uranium Mononitride Surrogate

A Rapid Sintering Method for Cerium Nitride Pellet: A Uranium Mononitride Surrogate

Studying the in vitro corrosion response of nanostructured TaN coatings in Hank's physiological solution

Surface characterization and electrochemical properties of tantalum nitride (TaN) nanostructured coatings produced by reactive DC magnetron sputtering

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