An Engineering Zirconia Ceramic Made of Baddeleyite

Rodaev, Vyacheslav V.; Zhigachev, Andrey O.; Tyurin, A. I.; Razlivalova, Svetlana S.; Коренков, В. В.; Golovin, Yuri I.

doi:10.3390/ma14164676

Cited by 11 publications

(6 citation statements)

References 13 publications

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“…It seems that the last is about 1 µm for ceramics of this type. According to [58], the microhardness of m-ZrO 2 is lower than t-ZrO 2 . During indentation, the t-m transition occurs with the formation of m-ZrO 2 which causes the lowering of microhardness.…”

Section: Mechanical Properties Of Ysz Ceramics and The Relations To T...mentioning

confidence: 99%

“…In particular, from the point of view of yttrium distribution between the t-ZrO 2 and m-ZrO 2 phases (Table 2), a steep decrease in yttrium percentage was observed for the m-ZrO 2 phase agglomerates with a sintering temperature increase. However, this did not allow the (t-m) ZrO 2 phase transformation [58] to occur to a great extent and thus did not provide high values of fracture toughness even for variant 8YSZ-1600. The morphology of the m-ZrO 2 phase agglomerates was characterized by blurred contours and the t-ZrO 2 phase particles were quite distinct for variant 8YSZ-1550 (Figure 7g).…”

Section: Mechanical Properties Of Ysz Ceramics and The Relations To T...mentioning

confidence: 99%

“…The increase in sintering temperature up to 1600 • C leads to intensive grain growth in YSZ ceramics. This, in turn, leads to the suppression of retention of the metastable tetragonal zirconia [58] in the case when the average grain size of the t-ZrO 2 phase is larger than the admissible one. It seems that the last is about 1 µm for ceramics of this type.…”

Section: Mechanical Properties Of Ysz Ceramics and The Relations To T...mentioning

confidence: 99%

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The Effect of Sintering Temperature on the Phase Composition, Microstructure, and Mechanical Properties of Yttria-Stabilized Zirconia

et al. 2022

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It is known that the yttria-stabilized zirconia (YSZ) material has superior thermal, mechanical, and electrical properties. This material is used for manufacturing products and components of air heaters, hydrogen reformers, cracking furnaces, fired heaters, etc. This work is aimed at searching for the optimal sintering mode of YSZ ceramics that provides a high crack growth resistance. Beam specimens of ZrO2 ceramics doped with 6, 7, and 8 mol% Y2O3 (hereinafter: 6YSZ, 7YSZ, and 8YSZ) were prepared using a conventional sintering technique. Four sintering temperatures (1450 °C, 1500 °C, 1550 °C, and 1600 °C) were used for the 6YSZ series and two sintering temperatures (1550 °C and 1600 °C) were used for the 7YSZ and 8YSZ series. The series of sintered specimens were ground and polished to reach a good surface quality. Several mechanical tests of the materials were performed, namely, the microhardness test, fracture toughness test by the indentation method, and single-edge notch beam (SENB) test under three-point bending. Based on XRD analysis, the phase balance (percentages of tetragonal, cubic, and monoclinic ZrO2 phases) of each composition was substantiated. The morphology of the fracture surfaces of specimens after both the fracture toughness tests was studied in relation to the mechanical behavior of the specimens and the microstructure of corresponding materials. SEM-EDX analysis was used for microstructural characterization. It was found that both the yttria percentage and sintering temperature affect the mechanical behavior of the ceramics. Optimal chemical composition and sintering temperature were determined for the studied series of ceramics. The maximum transformation toughening effect was revealed for ZrO2-6 mol% Y2O3 ceramics during indentation. However, in the case of a SENB test, the maximum transformation toughening effect in the crack tip vicinity was found in ZrO2-7 mol% Y2O3 ceramics. The conditions for obtaining YSZ ceramics with high fracture toughness are discussed.

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Section: Mechanical Properties Of Ysz Ceramics and The Relations To T...mentioning

confidence: 99%

Section: Mechanical Properties Of Ysz Ceramics and The Relations To T...mentioning

confidence: 99%

Section: Mechanical Properties Of Ysz Ceramics and The Relations To T...mentioning

confidence: 99%

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The Effect of Sintering Temperature on the Phase Composition, Microstructure, and Mechanical Properties of Yttria-Stabilized Zirconia

et al. 2022

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“…Chu Liang and Chang Zhisheng [22] [23] conducted acoustic emission signal monitoring on the Brazilian splitting test process of zirconia toughened alu-mina, and found that zirconia toughened alumina ceramics have higher fracture tough-ness compared to alumina ceramics without toughening effect. Scholars have also con-ducted relevant studies on the fracture toughness of zirconia ceramics under different conditions [24] [25] [26] [27]. When studying the deformation and damage of zirconia ceramics, many cracks are excited.…”

Section: Introductionmentioning

confidence: 99%

Study on Acoustic Emission Characteristics of Deformation Damage Process of Zirconia Ceramics

Fu,

Lai

2024

MSCE

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Zirconia ceramics have become increasingly widely used in recent years and are favored by relevant enterprises. From the traditional dental field to aerospace, parts manufacturing has been used, but there is limited research on the deformation and damage process of zirconia ceramics. This article analyzes the acoustic emission characteristics of each stage of ceramic damage from the perspective of acoustic emission, and explores its deformation process characteristics from multiple perspectives such as time domain, frequency, and EWT modal analysis. It is concluded that zirconia ceramics exhibit higher brittleness and acoustic emission strength than alumina ceramics, and when approaching the fracture, it tends to generate lower frequency acoustic emission signals.

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“…This transformation, related with a volumetric expansion about 4-5%, contributes to the decrease in zirconia-based ceramics implant strength. Different types of oxides are used as stabilizers (such as Y2O3, MgO and others) to maintain the appropriate tetragonal phase at room temperature (Rodaev et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Starch Consolidation Casting Method for Preparation Of ZrO2–Al2O3–MgO Porous Structure

Shakir

Géber²

2022

MDT

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The starch consolidation casting (SCC) method was used for the preparation of porous structure ceramic based on partially stabilized ZrO2 with other oxides such as MgO and Al2O3 with the addition of tapioca and potato starch as a binder and pore-forming agents. For casting purpose, three impermeable plastic moulds were designed and manufactured with different sizes and shapes depending on the shape and size of the required samples. The method is based on the fact that after being heated to about 80°C, starch may swell and absorb water from aqueous ceramic solutions. The process's simplicity, the ability to create complicated shapes using different moulds, and the inexpensive cost of the necessary processing tools and materials are its main benefits.

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An Engineering Zirconia Ceramic Made of Baddeleyite

Cited by 11 publications

References 13 publications

The Effect of Sintering Temperature on the Phase Composition, Microstructure, and Mechanical Properties of Yttria-Stabilized Zirconia

The Effect of Sintering Temperature on the Phase Composition, Microstructure, and Mechanical Properties of Yttria-Stabilized Zirconia

Study on Acoustic Emission Characteristics of Deformation Damage Process of Zirconia Ceramics

Starch Consolidation Casting Method for Preparation Of ZrO2–Al2O3–MgO Porous Structure

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