Enhanced ionic conductivity and thermal shock resistance of MgO stabilized ZrO2 doped with Y2O3

Wen, Tianpeng; Yuan, Lei; Liu, Tao; Sun, Qiaoyang; Jin, Endong; Tian, Chen; Yu, Jingkun

doi:10.1016/j.ceramint.2020.05.038

Cited by 30 publications

(6 citation statements)

References 24 publications

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“…Notably, c-ZrO 2 is the most significant constituent of ZrO 2 , followed by t-ZrO 2 , whereas m-ZrO 2 is the least abundant. The stable cubic phase of ZrO 2 from room temperature to melting temperature is mainly due to the formation of Y 2 O 3 in the coating [25]. When the concentration of the Y(NO 3 ) 3 was altered, there was a slight increase in the diffraction peak intensity of the ZrO 2 and Y 2 O 3 .…”

Section: Phase Analysis Of Mao Coatingmentioning

confidence: 99%

The Effect of Yttrium Nitrate Content on the Microstructure and Properties of a Micro-Arc Oxidation Coating Prepared on a ZK61M Magnesium Alloy

Li,

Wang,

Geng

et al. 2023

Coatings

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To investigate the effect of the content of yttrium nitrate on the microstructure and properties of micro-arc oxidation coatings on a ZK61M magnesium alloy, this study successfully prepared a ZrO2-Y2O3-containing composite ceramic coating on a ZK61M magnesium alloy by using micro-arc oxidation (MAO) technology, adding different amounts of yttrium nitrate (0 g/L, 0.15 g/L, 0.45 g/L, and 0.75 g/L) to a zirconate electrolyte with the main components of 6 g/L of (NH4)2ZrF6, 4 g/L of NaH2PO4, 1 g/L of NaF, and a pH value of 7.5–8.0. The microstructure, phase composition, corrosion resistance, and friction coefficient of the coating were investigated using a scanning electron microscope, an energy spectrometer, an X-ray diffractometer, a photoelectron spectrometer, an electrochemical tester, and a friction and wear tester, respectively. The results showed that the composite ceramic coating was composed of c-ZrO2, t-ZrO2, m-ZrO2, MgO, Y2O3, and MgF2. Among the MAO coatings prepared in this experiment, it was when the concentration of the Y(NO3)3 was 0.75 g/L that the coating exhibited the best corrosion resistance and wear resistance. The corrosion current density (Icorr) was 1.415 × 10−8 A·cm−2, which was four orders of magnitude lower than that of the substrate. The friction coefficient and wear volume of the coating were reduced by 30.77% and 96.55% compared to the substrate, respectively.

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Section: Phase Analysis Of Mao Coatingmentioning

confidence: 99%

The Effect of Yttrium Nitrate Content on the Microstructure and Properties of a Micro-Arc Oxidation Coating Prepared on a ZK61M Magnesium Alloy

Li,

Wang,

Geng

et al. 2023

Coatings

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“…The improved properties of zirconia-based ceramics are largely provided by the presence of a tetragonal phase in their microstructure. The tetragonal phase is metastable, and its stabilization at room temperature can be achieved by doping zirconia with other oxides (stabilizers), such as CaO [2], MgO [3], Y 2 O 3 [4][5][6], and CeO 2 [7,8].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Sintering Temperature on Phase-Related Peculiarities of the Microstructure, Flexural Strength, and Fracture Toughness of Fine-Grained ZrO2–Y2O3–Al2O3–CoO–CeO2–Fe2O3 Ceramics

Kulyk,

Vasyliv,

Duriagina

et al. 2024

Crystals

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The lifetime of products made of ceramic materials is related to their mechanical characteristics such as strength, hardness, wear resistance, and fracture toughness. The purpose of this work was to study the effect of sintering temperature on the phase-related peculiarities of the microstructures, causing changes in the flexural strength and fracture toughness of fine-grained ZrO2–Y2O3–Al2O3–CoO–CeO2–Fe2O3 ceramics. Flexural strength and fracture toughness tests were carried out using ceramics sintered in three modes (2 h at 1550 °C, 1580 °C, and 1620 °C in argon), and thorough phase, microstructure, and fractographic analyses were performed. For the ceramic sintered at 1550 °C, a mixed mechanism of intergranular fracture of the t-ZrO2 phase particles and cleavage fracture of the Ce–Al–O phase particles was found, which is reflected in its comparatively low fracture toughness. For the ceramic sintered at 1580 °C, a fracture developed along the boundaries of the aggregates, made of completely recrystallized fine ZrO2 grains with a high bond strength between adjacent t-ZrO2 grains; this corresponds to the highest fracture toughness (5.61 ± 0.24 MPa·m1/2) of this ceramic. For the ceramic sintered at 1620 °C, a transgranular fracture of the t-ZrO2 phase and Ce–Al–O phase particles and crack propagation along the t-ZrO2/Ce–Al–O interface were revealed; this caused a decrease in fracture toughness.

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“…Thermal shock test is also a common method to test the adhesion strength and stability of the coating under the condition between thermal and cold. Wen et al [24] and Qiu et al [25] observe the microstructures between the coating and the substrate through thermal cycles experiments.…”

Section: Introductionmentioning

confidence: 99%

One-step preparation of α-Al2O3/SiO2 composite tritium permeation barrier via slurry spin coating method and performance investigation

Liu

ZOU

Yang

et al. 2023

Preprint

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In the fusion reactor, a-Al2O3 and its composite coatings have became the preferred material for tritium permeation barriers. The slurry spin coating method in this study is used to prepare α-Al2O3/SiO2 composite coating for one-step at the temperature of 600 °C, 700 °C and 800 °C. The effect of heat treatment temperature on the composite coating's microstructure and adhesion strength is investigated. When the coating prepared temperature is 600 °C, the thermal shock resistance and hydrogen permeation resistance are also studied. The findings demonstrate that as the heat treatment temperature rises, defects such as holes and cracks appear. The surface of the composite coating is continuous and compact when the preparation temperature is 600 °C, and the adhesion strength is 88.7 N. Thermal shock tests demonstrate that the 600 °C-α-Al2O3/SiO2 composite coating is still dense and is bonded well to the substrate after 50 times thermal shocks at 500 °C. The hydrogen resistance capability indicate that the 600 °C-α-Al2O3/SiO2 composite is 4.6 times greater than the substrate.

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Enhanced ionic conductivity and thermal shock resistance of MgO stabilized ZrO2 doped with Y2O3

Cited by 30 publications

References 24 publications

The Effect of Yttrium Nitrate Content on the Microstructure and Properties of a Micro-Arc Oxidation Coating Prepared on a ZK61M Magnesium Alloy

The Effect of Yttrium Nitrate Content on the Microstructure and Properties of a Micro-Arc Oxidation Coating Prepared on a ZK61M Magnesium Alloy

The Effect of Sintering Temperature on Phase-Related Peculiarities of the Microstructure, Flexural Strength, and Fracture Toughness of Fine-Grained ZrO2–Y2O3–Al2O3–CoO–CeO2–Fe2O3 Ceramics

One-step preparation of α-Al2O3/SiO2 composite tritium permeation barrier via slurry spin coating method and performance investigation

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