Thermal and Mechanical Properties of Y&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt;-Partially Stabilized Zirconia

Tsukuma, Koji; Kubota, Yoshitaka; Nobugai, Koji

doi:10.2109/jcersj1950.92.1065_233

Cited by 25 publications

(10 citation statements)

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“…Therefore, the study on thermal expansion behavior is important to develop a novel zirconia-based solid solution with a relatively stable expansion coefficients over the whole temperature range used. The thermal expansion coefficients of 2-6 mol% Y 2 O 3 -stabilized zirconia ceramics decrease with increasing the Y 2 O 3 content in a temperature range of 100-1500 • C [7]. Similar results were found in a 3-10 mol% Y 2 O 3 -stabilized zirconia ceramics in a temperature range of −170 to 603 • C [8].…”

Section: Introductionsupporting

confidence: 74%

Influence of gadolinia on thermal expansion property of ZrO2–4.5mol%Y2O3 ceramics

Liu

Ouyang

Zhou

2009

Journal of Alloys and Compounds

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Section: Introductionsupporting

confidence: 74%

Influence of gadolinia on thermal expansion property of ZrO2–4.5mol%Y2O3 ceramics

Liu

Ouyang

Zhou

2009

Journal of Alloys and Compounds

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“…[ 14 ] The thermal expansion coefficient data in Figure 2a,b are from. [ 16–36 ] c) Some candidate coating compositions for C‐103 Nb‐based substrate.…”

Section: Etbc Design Considerationsmentioning

confidence: 99%

Design, Fabrication, and Screening of Environmental‐Thermal Barrier Coatings Prepared by Ultrafast High‐Temperature Sintering

Xie,

Champagne,

Zhong

et al. 2023

Adv Funct Materials

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The demand for more efficient gas turbines relies heavily on the development of new environmental‐thermal barrier coatings (ETBCs). However, there is still uncertainty about which alloys and composites will be used for the next generation of turbine blades, as well as the most promising coating materials. Herein, an ETBCs development strategy is presented by integrating the coating design, synthesis, and screening using an ultrafast high temperature sintering (UHS) technique to accelerate coating improvements. The initial basis for composition selection is their thermal expansion mismatch with the substrate alloys; for which a temperature‐dependent coefficient of thermal expansion database is created. By combining tape casting method with the UHS technique a high‐throughput synthesis of single and multi‐layer coatings are realized with different compositions, layer stacking sequences, and layer thicknesses. To evaluate the coatings, thermal cycling tests from room temperature to 1300 °C are conducted. The approach enabled coatings on objects with complex geometries, multi‐layer ETBCs, and porosity tailoring by using staged UHS that runs with different temperatures and durations. The fast iteration strategy is more cost‐effective for the screening of ETBCs compared to conventional methods and greater throughput which can be further extended for rapid optimization of other materials systems.

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“…Figure 6 shows the bend strength of Zr02-Y203 alloys as a function of yttria content. Figure 6 includes the data on skull-melted single crystals (21) and commercially-sintered products (22) (23). The alloys with 2-4 mol% Y2O3 have a bend strength greater than 1.0 GPa, which is the highest among various high-performance ceramics.…”

mentioning

confidence: 99%

Phase Transformation and Microstructure of Partially-Stabilized Zirconia

Sakuma

1988

Trans. JIM

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Phase transformations and the resultant microstructures of partially-stabilized zirconia (PSZ) are briefly reviewed with a special interest in the nature of phase transformations. The martensitic tetragonal-to-monoclinic transformation, which plays a principal role in toughening of PSZ, accompanies lattice defects such as twins or dislocations in the product phase m-ZrO2. The diffusionless cubicto-tetragonal (c-t) transformation is characterized by two different microstructures; one with the domain structure whose boundaries have curvilinear features showing the contrast of anti-phase domain boundaries in ordered alloys, and the other with thin-plates or 1enticular features. It seems that the diffusionless c-t transformation is always completed by an initial development of domain structure over the entire region of samples. The thin plates or lenticular features may be subsequently formed by the strain accommodation. The nature of the diffusionless c-t transformation is the second order phase transition. The precipitation of t-ZrO2 in the c-ZrO2 matrix is commonly found in alloys heat-treated in the cubic/tetragonal two-phase region. Together with the usual precipitation structures, the modulated or tweed structure is also formed at an early stage of aging. The origin of these microstructures, and the nature of the diffusional reaction or precipitation is discussed in this paper.

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Thermal and Mechanical Properties of Y<sub>2</sub>O<sub>3</sub>-Partially Stabilized Zirconia

Cited by 25 publications

References 0 publications

Influence of gadolinia on thermal expansion property of ZrO2–4.5mol%Y2O3 ceramics

Influence of gadolinia on thermal expansion property of ZrO2–4.5mol%Y2O3 ceramics

Design, Fabrication, and Screening of Environmental‐Thermal Barrier Coatings Prepared by Ultrafast High‐Temperature Sintering

Phase Transformation and Microstructure of Partially-Stabilized Zirconia

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