Activation and pumping characteristics of Ti–Zr–V films deposited on narrow tubes

Zhu, Bangle; Ge, Xiaomei; Wang, Sihui; Wei, Wei; Wang, Yigang; Liu, Gongfa; Wang, Yong

doi:10.1007/s41365-021-00880-4

Cited by 10 publications

(14 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to the simulation results shown in the first two columns of Figure , the byproducts of Ti/Zr/V-COOH (trans) and HCOO-Zr (cis) should be present on the film surface at RT (refer to Figure ). The signal of −COO– in the C 1s spectra shown in Figures and and the previous research results ,,,, verified the reliability of our research results and the rationality of our simulation model.…”

Section: Discussionsupporting

confidence: 86%

“…In the analysis of metal element p or d spectra for the as-received TiZrV NEG surface layer, although Ti and Zr reached their highest oxide states, V 2 O 5 was not the dominant form of V. − Similar results have been observed for TiZrHfV and some ZrV NEG film passivation layers. However, different situations have also been discovered in the study of ZrV NEG films. , In O 1s for the surface layer of different types of NEGs, ,− ,− the signal of hydroxyl groups was observed apart from the strong peak of alloy oxides. The hydroxyl group was also reflected in the metal element p or d spectra, such as Zr 3d ,,, and Ni 2p .…”

Section: Introductionsupporting

confidence: 55%

“…The peak with a broad range in the GIXRD pattern (Figure ) indicates that Ti, Zr, and V atoms are randomly distributed in the amorphous film matrix, which is consistent with previous research results. ,,,,, In this microstructure, the arrangement of metal atoms is disordered at the long scale, but can be ordered at the short scale . At the atomic scale, the distribution of atoms is typically in the nonuniform pattern. , Given the complexity of the distribution and spacing information on different metal atoms, it is quite difficult to construct a plate model that can truly reflect this randomly disordered structure .…”

Section: Discussionmentioning

confidence: 99%

“…The microstructural characteristics of the film sample were characterized using a Bruker+D8 Advance GIXRD. In the GIXRD study, the grazing angle was fixed at 1°, 13 the 2θ range was selected in the range of 20°to 60°, and the step size was kept at 0.02°.…”

Section: Gixrd Studymentioning

confidence: 99%

See 3 more Smart Citations

Formation Mechanism of Passivation Layer under Air Exposure on TiZrV Non-Evaporable Getter Film

Shi,

Wang,

Shi

et al. 2024

J. Phys. Chem. C

View full text Add to dashboard Cite

Non-evaporable getter (NEG) films require thermal vacuum activation prior to their use in high vacuum environments. The degree of activation difficulty is influenced by the properties of the passivation layer, but there is limited information about its composition. The purpose of this study is to investigate the formation mechanism and clarify this issue. The film microstructure was investigated by scanning electron microscopy (SEM) and grazing incidence X-ray diffraction (GIXRD). The quantum chemical approach and a single-metal-atom catalytic model were used to calculate the energy barrier for the reactions between the metal atom and the gas molecule, as well as between different hydrocarbon groups. These results facilitated the deconvolution of the X-ray photoelectron spectroscopy (XPS) data and the variation analysis of the energy dispersive spectroscopy (EDS) results. It can be concluded that the presence or absence of hydrogen-proton catalysis can significantly affect the dissociation pathways of carbon dioxide, leading to the formation of different reaction products. In addition, the long-term aluminum foil wrapping and storage can significantly affect the composition of the film passivation layer. This study provides valuable insights not only into the passivation layer formation mechanism, but also into the film gettering mechanism.

show abstract

Section: Discussionsupporting

confidence: 86%

Section: Introductionsupporting

confidence: 55%

Section: Discussionmentioning

confidence: 99%

Section: Gixrd Studymentioning

confidence: 99%

See 2 more Smart Citations

Formation Mechanism of Passivation Layer under Air Exposure on TiZrV Non-Evaporable Getter Film

Shi,

Wang,

Shi

et al. 2024

J. Phys. Chem. C

View full text Add to dashboard Cite

show abstract

“…However, in an extreme environment under accident conditions, zircaloy claddings suffer from rapid oxidation and severely depleted mechanical properties, causing hydrogen generation and catastrophic failure. Hence, in recent years, it has attracted worldwide interest to develop enhanced accidenttolerant fuel (ATF) cladding materials to enhance the accident resistance of claddings during beyond-design-basis scenarios [1][2][3][4][5]. Among several reported potential methods, surface coating with superior oxidation resistance deposited on the zircaloy cladding has been considered one of the near-term solutions for next-generation ATF systems [2,6].…”

Section: Introductionmentioning

confidence: 99%

Interdiffusion behavior between Cr and Zr and its effect on the microcracking behavior in the Cr-coated Zr-4 alloy

Jiang¹,

Wang²,

Du³

et al. 2021

NUCL SCI TECH

View full text Add to dashboard Cite

High-temperature chromium (Cr)-zirconium (Zr) interdiffusion commonly occurs in Cr-coated zircaloys applied for enhanced accident-tolerant fuel (ATF) claddings. Such interdiffusion changes the interfacial microstructure and thus the fracture mechanism of the coating under external loading. In this study, the interdiffusion behavior in a magnetron sputtered Cr coating deposited on a Zr-4 alloy was studied in a vacuum environment at 1160 °C. In addition, the effect of interdiffusion on the microcracking behavior of the Cr coating was determined by in situ three-point bending tests. The experimental results show that the interdiffusion behavior resulted in the formation of a ZrCr 2 layer, accompanied by the consumption of Cr coating and interfacial roughening. The growth of the diffusion layer followed a nearly parabolic law with respect to annealing time, and the residual stress of the annealed coating decreased with increasing annealing time. Under external loading, a large number of cracks were generated in the brittle interlayer, and some interfacial cracks were formed and grew at the ZrCr 2 /Zr-4 interface. Despite the remarkable microcracks in the ZrCr 2 layer, the vacuum-annealed Cr coating has significantly fewer cracks than the original coating, mainly because of the recrystallization of the coating during annealing.

show abstract

Selection diagram of design algorithms for neutron-focusing supermirrors

Wang

2022

NUCL SCI TECH

View full text Add to dashboard Cite

Activation and pumping characteristics of Ti–Zr–V films deposited on narrow tubes

Cited by 10 publications

References 24 publications

Formation Mechanism of Passivation Layer under Air Exposure on TiZrV Non-Evaporable Getter Film

Formation Mechanism of Passivation Layer under Air Exposure on TiZrV Non-Evaporable Getter Film

Interdiffusion behavior between Cr and Zr and its effect on the microcracking behavior in the Cr-coated Zr-4 alloy

Selection diagram of design algorithms for neutron-focusing supermirrors

Contact Info

Product

Resources

About