Effects of TiO2 doping on the defect chemistry and thermo-physical properties of Yb2O3 stabilized ZrO2

Guo, Liu; Zhang, Chenglong; Xu, Luming; Li, Mingzhu; Wang, Qi; Ye, Fuxing; Dan, Chengyi; Ji, Vincent

doi:10.1016/j.jeurceramsoc.2017.04.065

Cited by 50 publications

(18 citation statements)

References 44 publications

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“…Additionally, due to the mass difference between Ti 4+ and Zr 4+ , mass fluctuation can also be introduced in the lattice. As a result, a large phonon scattering coefficient is obtained in the compounds, giving rise to stronger phonon scattering ability and a lower phonon mean free path [27,28,36]. Hence, the thermal conductivity of TiO2-doped ErSZ decreases with the increase of the TiO2 content.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the evidence for the presence of interstitial ions cannot be observed through the XRD analysis. However, the phase evolution of TiO 2 -doped ErSZ can be explained by the solid-solution mechanism proposed in [28]. The formation of the c phase is due to the decreased average coordination numbers of cations caused by the presence of Ti 4+ interstitial ions.…”

Section: Methodsmentioning

confidence: 99%

“…It could be found that 10 mol % TiO 2 doped ErSZ has the lowest m phase content, about 3.5 mol %. Previous research has demonstrated that, in the TiO 2 -Yb 2 O 3 -ZrO 2 solid solution, Ti 4+ first occupies the interstitial sites when the content is ≤2.5 mol %, followed by substituting for Zr 4+ at higher doping contents [28]. In TiO 2 -doped YbSZ series, YbSZ consists of a t phase, small amounts of TiO 2 doping causes a c phase, and higher TiO 2 doping decreases the c phase content and produces an m phase.…”

Section: Methodsmentioning

confidence: 99%

“…Research indicates that doping TiO 2 into RE 2 O 3 stabilized ZrO 2 can reduce the thermal conductivity, enhance the toughness, and improve the phase stability [25][26][27][28]. Therefore, this study is conducted on a ZrO 2 -Er 2 O 3 -TiO 2 system, investigating the effects of TiO 2 doping on the phase composition, thermal conductivity, and toughness of the compounds.…”

Section: Introductionmentioning

confidence: 99%

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Phase Composition, Thermal Conductivity, and Toughness of TiO2-Doped, Er2O3-Stabilized ZrO2 for Thermal Barrier Coating Applications

et al. 2018

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TiO 2 was doped into Er 2 O 3 -stabilized ZrO 2 (ErSZ) to obtain desirable properties for thermal barrier coating (TBC) applications. The phase composition, thermal conductivity, and mechanical properties of TiO 2 -doped ErSZ were investigated. ErSZ had a non-transformable metastable tetragonal (t ) phase, the compound with 5 mol % TiO 2 consisted of t and cubic (c) phases, while 10 mol % TiO 2 doped ErSZ had t , c, and about 3.5 mol % monoclinic (m) phases. Higher TiO 2 doping contents caused more m phase, and the compounds were composed of t and m phases. When the dopant content was below 10 mol %, TiO 2 doping could decrease the thermal conductivity and enhance the toughness of the compounds. At higher doping levels, the compounds exhibited an increased thermal conductivity and a reduction in the toughness, mainly attribable to the formation of the undesirable m phase. Hence, 10 mol % TiO 2 -doped ErSZ could be a promising candidate for TBC applications.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Phase Composition, Thermal Conductivity, and Toughness of TiO2-Doped, Er2O3-Stabilized ZrO2 for Thermal Barrier Coating Applications

et al. 2018

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“…Thermal barrier coatings (TBCs) are used to protect the metallic components from the damage caused by hot gas in gas turbine engines . Currently, 6‐8 wt% Y 2 O 3 partially stabilized zirconia (YSZ) is commercially employed as the ceramic topcoat material of the thermal barrier coatings .…”

Section: Introductionmentioning

confidence: 99%

High‐temperature mechanical and thermal properties of Ca₁₋_xSr_xZrO₃solid solutions

et al. 2019

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Perovskite oxides are promising thermal barrier coatings (TBCs) materials but their thermophysical properties still need to be further improved before commercial applications. In this work, mechanical/thermal properties of calcium‐strontium zirconate solid solutions (Ca1−xSrxZrO3) are investigated. Comparing to the end‐compounds CaZrO3 and SrZrO3, the solid solutions achieve the enhanced thermal expansion coefficient, decreased thermal conductivity as well as good high‐temperature mechanical properties. The experimental thermal conductivities of Ca1−xSrxZrO3 (x = 0.2, 0.4, 0.6, 0.8) are in the range of 1.76‐1.94 W·(m·K)−1 at 1073 K, being lower than that of the yttria‐stabilized zirconia (YSZ). At the same time, their thermal expansion coefficients (10.75 × 10−6‐11.23 × 10−6/K at 1473 K) are comparable to that of YSZ. Moreover, the Young's moduli of Ca0.8Sr0.2ZrO3, Ca0.6Sr0.4ZrO3, Ca0.4Sr0.6ZrO3, and Ca0.2Sr0.8ZrO3 at 1473 K are 70.7%, 69.4%, 68.8%, and 71.1% of the corresponding values at room temperature, respectively. The good high‐temperature mechanical and thermal properties ensure the potential applications of Ca1−xSrxZrO3 solid solutions as high‐temperature thermal insulation materials including TBCs.

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Study of Thermal Conductivity of NiCrFeSi Based Ceramic Composite Coating

Yadav¹,

Sah²,

Mann³

et al. 2022

Optimization of Industrial Systems

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Effects of TiO2 doping on the defect chemistry and thermo-physical properties of Yb2O3 stabilized ZrO2

Cited by 50 publications

References 44 publications

Phase Composition, Thermal Conductivity, and Toughness of TiO2-Doped, Er2O3-Stabilized ZrO2 for Thermal Barrier Coating Applications

Phase Composition, Thermal Conductivity, and Toughness of TiO2-Doped, Er2O3-Stabilized ZrO2 for Thermal Barrier Coating Applications

High‐temperature mechanical and thermal properties of Ca₁₋_xSr_xZrO₃solid solutions

Study of Thermal Conductivity of NiCrFeSi Based Ceramic Composite Coating

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Effects of TiO2 doping on the defect chemistry and thermo-physical properties of Yb2O3 stabilized ZrO2

Cited by 50 publications

References 44 publications

Phase Composition, Thermal Conductivity, and Toughness of TiO2-Doped, Er2O3-Stabilized ZrO2 for Thermal Barrier Coating Applications

Phase Composition, Thermal Conductivity, and Toughness of TiO2-Doped, Er2O3-Stabilized ZrO2 for Thermal Barrier Coating Applications

High‐temperature mechanical and thermal properties of Ca1−xSrxZrO3solid solutions

Study of Thermal Conductivity of NiCrFeSi Based Ceramic Composite Coating

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High‐temperature mechanical and thermal properties of Ca₁₋_xSr_xZrO₃solid solutions