Coarse-grain CeO2 doped ZrO2 ceramic prepared by spark plasma sintering

Vojtko, Marek; Puchý, Viktor; Múdra, Erika; Milkovič, Ondrej; Kovalčíková, Alexandra

doi:10.1016/j.jeurceramsoc.2020.05.014

Cited by 22 publications

(8 citation statements)

References 21 publications

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“…Zirconia undergoes a phase transformation during heating from monoclinic to tetragonal (at 1173 °C) and to cubic (at 2370 °C). High-temperature phases are unstable at 20 °C, although they can be stabilized by alloying with CaO [ 16 ], MgO [ 17 ], Y 2 O 3 [ 14 , 18 ], and CeO 2 [ 19 ]. In stomatology, for example, the tetragonal phase is preferred due to the combination of high strength and toughness, and optimum optical properties.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Yttria Content on Microstructure, Strength, and Fracture Behavior of Yttria-Stabilized Zirconia

et al. 2022

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Yttria-stabilized zirconia (YSZ) is well-known as a material with perfect mechanical, thermal, and electrical properties. It is used for manufacturing various high-temperature components for aerospace and energy generation, as well as wear- and corrosion-resistant devices in medicine. This work investigated the effect of a Y2O3 addition to ZrO2 on the microstructure and mechanical properties of YSZ ceramics produced by one sintering schedule. ZrO2 ceramics doped with 3, 4, 5, 6, 7, and 8 mol% Y2O3 (designated 3YSZ through to 8YSZ) were prepared by using conventional sintering at 1550 °C for 2 h in argon. The effect of yttria content was analyzed with respect to grain size, morphology of the microstructural features, phase composition, parameters of fracture surface, and flexural strength. The 7YSZ ceramics sintered at 1550 °C for 2 h showed the highest level of flexural strength due to the formation of the fine-grained microstructure containing mainly the monoclinic and tetragonal zirconia phases. The fracture micromechanism in the studied YSZ ceramics is discussed.

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Section: Introductionmentioning

confidence: 99%

“…In Reference [ 19 ], zirconia was stabilized by CeO 2 . Following the plasma arc sintering at 2000 °C, a coarse-grain microstructure was formed with an average grain size of ~100 μm.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Yttria Content on Microstructure, Strength, and Fracture Behavior of Yttria-Stabilized Zirconia

et al. 2022

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“…106 Ce-doped zirconia was prepared by coprecipitation, spark plasma sintering, 107 and spark plasma sintering. 108 By employing the co-evaporation technique and the electron beam physical vapor deposition (PVD) approach, nanocoating made of single layers of silver (Ag) and cerium-stabilized zirconia (Ce-SZ) was produced upon titanium substrates. 109 Bejugama et al conducted an in vitro, cellular response, and cytotoxicity research of the niobium and Ce-doped zirconia (Nb-CSZ)based implants.…”

Section: Ceria-doped Zirconiamentioning

confidence: 99%

Advancement in ceramic biomaterials for dental implants

Upadhyay,

Pradhan,

Yenurkar

et al. 2024

Int J Applied Ceramic Tech

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There has been enormous research on diagnostic and therapeutic dental methods due to the growing recognition of oral wellness. Numerous studies in this area have resulted in dental biomaterials, including polymers, metals, and acrylic resins, essential to restore teeth affected by illnesses or accidents. Compared to other biomaterials, such as metals or polymers, ceramics offer distinct features. Materials like zirconia and alumina demonstrate their high intrinsic strength, making them appropriate for biomedical applications like dental implants or artificial joints. Additionally, they have outstanding biocompatibility, which lowers the possibility of adverse effects or inflammation. Some ceramics, like hydroxyapatite (HA) and bioactive glasses, even encourage tissue integration and regeneration. Moreover, because of their adaptability, they can be precisely shaped and composed to emphasize specific characteristics. Yttria‐stabilized tetragonal zirconia offers outstanding mechanical properties and biocompatibility but faces concerns over long‐term durability due to low‐temperature degradation. To address this, researchers have developed non‐oxidic ceramics like silicon nitride and advanced oxide‐based materials like alumina‐zirconia composites, aiming to enhance the durability and reliability of biomedical applications. In this review, we highlighted the recent advancements in ceramic dental implants; examples and applications of different ceramics‐based materials, including zirconia, alumina, HA, and beta calcium phosphate, are provided in detail.

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“…22,23 Other studies have shown that appropriate grain sizes can improve the materials' hardness. 24,25 In view of this, a particle size gradient distribution in the (Ti,W)C cermet material was formed owing to the discharge and skin effects of pulse current during high-frequency SPS (HF-SPS), following which the performance gradient distribution was obtained. At the same time, the distribution law of current density in the sample was analyzed by means of finite element simulation.…”

Section: Introductionmentioning

confidence: 99%

“…Some studies have shown that the grain size significantly affects the mechanical properties of materials, with smaller grains positively affecting the materials’ flexural strength and toughness 22,23 . Other studies have shown that appropriate grain sizes can improve the materials’ hardness 24,25 . In view of this, a particle size gradient distribution in the (Ti,W)C cermet material was formed owing to the discharge and skin effects of pulse current during high‐frequency SPS (HF‐SPS), following which the performance gradient distribution was obtained.…”

Section: Introductionmentioning

confidence: 99%

Performance gradient distribution of (Ti,W)C cermet by skin effects of high‐frequency spark plasma sintering

Wang

Song

et al. 2022

J Am Ceram Soc.

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A (Ti,W)C cermet with graded properties was prepared using high‐frequency spark plasma sintering (HF‐SPS). The effects of the sintering process on the microstructure and mechanical properties of the prepared cermet material were studied, and the densification behavior of the material was analyzed using scanning electron microscopy and energy‐dispersive X‐ray spectroscopy. Owing to the skin effect and pulse current discharge in HF‐SPS, the experimental results showed different sintering effects, as indicated by the current density difference between the surface layer and bulk. On one hand, the surface‐layer grains were larger, the metal phase was concentrated, and the hardness was high; however, the bulk grains were smaller, the metal phase was uniformly distributed, and the strength and toughness were high, causing the material to account for the higher hardness of the surface layer and the bulk strength and toughness. The skin effect of pulse direct current was key for the performance gradient distribution, whereas increases in the current density and sintering temperature decreased the skin effect. In general, the Joule heat effect was more significant, leading to abnormal grain growth.

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Coarse-grain CeO2 doped ZrO2 ceramic prepared by spark plasma sintering

Cited by 22 publications

References 21 publications

The Effect of Yttria Content on Microstructure, Strength, and Fracture Behavior of Yttria-Stabilized Zirconia

The Effect of Yttria Content on Microstructure, Strength, and Fracture Behavior of Yttria-Stabilized Zirconia

Advancement in ceramic biomaterials for dental implants

Performance gradient distribution of (Ti,W)C cermet by skin effects of high‐frequency spark plasma sintering

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