Phase relations in the ZrO2-FeO system

Bechta, Sevostian; Krushinov, E.V.; Almjashev, V.I.; Vitol, S. A.; Mezentseva, L. P.; Petrov, Yu. B.; Lopukh, D.B.; Khabensky, V.B.; Barrachin, M.; Hellmann, S.; Гусаров, В. В.

doi:10.1134/s0036023606020227

Cited by 18 publications

(6 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While extremely localized areas of the iron oxide-based solid solutions in zirconium dioxide may exist for the macroscopic particles, as it follows from data [17][18][19][20][21][22][23][24][25][26] (which is most pronounced for the low-temperature range), more wide solubility range of iron oxide in ZrO 2 -based nanocrystals was detected, which is shown by data [27][28][29][30][31][32][33][34][35][36], in case of nano-scale particles. In this case, the possibility and the ranges of solid solutions existence in this system to a great degree are determined by the synthesis method of considered compositions.…”

Section: Introductionmentioning

confidence: 99%

Solid-phase interaction in ZrO2-Fe2O3 nanocrystalline system

Kirillova¹,

Almjasheva²,

Панчук³

et al. 2018

Nanosystems: Phys. Chem. Math.

View full text Add to dashboard Cite

Based on the results of X-ray phase analysis and Mössbauer spectroscopy, it was demonstrated that in the ZrO 2-Fe 2 O 3 system, represented by the mechanical mixture of m-ZrO 2 (14 ± 2 nm) and α-Fe 2 O 3 (43 ± 2 nm) nanoparticles, being heated above the temperature corresponding to the melting temperature of the two-dimensional nonautonomous phase, transformation of α-Fe 2 O 3 occurs resulting in appearing of the X-ray amorphous magnetically disordered state localized on the surface of ZrO 2 nanoparticles in the form of a thin layer. Transformation pattern in ZrO 2-Fe 2 O 3 nanocrystalline system has been introduced.

show abstract

Section: Introductionmentioning

confidence: 99%

Solid-phase interaction in ZrO2-Fe2O3 nanocrystalline system

Kirillova¹,

Almjasheva²,

Панчук³

et al. 2018

Nanosystems: Phys. Chem. Math.

View full text Add to dashboard Cite

show abstract

“…Lattice volume measurement suggested the terminal solubility of Fe which reached during cooling process of the infusion treatment was about 0.5 wt% Fe. On the other hand, the terminal solubility of FeO in ZrO 2 at 1609 K reported by Beshta et al [24] was 1.4 ± 0.2 wt% Fe. From these considerations, the Fe solubility during the infusion treatment at 1273 K should exist between 0.5 and 1.4 wt% and that was more consistent with the saturation point of bubble number density than the solubility estimated by lattice volume changing.…”

Section: Discussionmentioning

confidence: 77%

Dependence of vacancy concentration on morphology of helium bubbles in oxide ceramics

Matsunaga¹,

Sakamoto²,

Muta

et al. 2014

Journal of Nuclear Science and Technology

View full text Add to dashboard Cite

Since the formation of helium bubbles degrades swelling property and thermal conductivity of minor actinide-containing mixed oxide (MA-MOX) fuel, it is essential to understand the conditions of the bubble formation. In order to examine the dependence of vacancy concentration on morphology of helium bubbles, helium was infused into (Zr,Fe)O 2−x . The oxygen vacancy concentration was controlled by addition of solute Fe 3 + into ZrO 2 . Helium was infused by hot isostatic pressing. The helium-infused specimens were observed by field emission scanning electron microscopy (FE-SEM) and field emission transmission electron microscopy (FE-TEM). In addition, X-ray fluorescence, X-ray diffraction analysis, conversion electron yield-X-ray absorption near-edge structure and FE-SEM/EDX (energy dispersive X-ray) analyses were also made to interpret the results of microstructure observations. As a result of the helium infusion treatment, numerous 0.5-10 nm bubbles were observed and its number density clearly depended on oxygen vacancy concentration. On the other hand, sizes of the helium nano-bubbles in all specimens were almost constant.

show abstract

“…Iron impurities (up to 0.02 at./f.u.) also stabilize the cubic modification of zirconium oxide [25]. According to the microanalysis data, the iron content in the regions is as high as 0.05 at./f.u.…”

Section: Introductionmentioning

confidence: 95%

Localization of uranium in radiation-damaged nanoheterogeneous natural zircon

et al. 2015

View full text Add to dashboard Cite

High uranium natural zircon with signs of hydrothermal (up to 300°C) treatment is studied via transmission electron microscopy, Raman spectroscopy, electron probe microanalysis, and local energy dis persive analysis performed in situ with a transmission electron microscope. Uranium based phases are not found in the regions with uranium concentrations of up to 10 wt % that exceed considerably the limit of sol ubility in synthetic zirconium silicate. Uranium is dissolved in a heterogeneous matrix that is formed as a result of the decomposition of radiation damaged (a dose of 10 17 α decays/mg) zircon under hydrothermal influence. The matrix incorporates amorphous partially hydrated silicon oxide and nanocrystalline cubic (Zr,Hf) 1 -y Me y O 2 stabilized with metal Me impurities (Y, Ca, Al, Fe; y ≈ 0.04). Cubic zirconium oxide is regarded as the preferred phase for uranium localization, while the total impurity concentration is ~0.13.

show abstract

Phase relations in the ZrO2-FeO system

Cited by 18 publications

References 5 publications

Solid-phase interaction in ZrO2-Fe2O3 nanocrystalline system

Solid-phase interaction in ZrO2-Fe2O3 nanocrystalline system

Dependence of vacancy concentration on morphology of helium bubbles in oxide ceramics

Localization of uranium in radiation-damaged nanoheterogeneous natural zircon

Contact Info

Product

Resources

About