Effect of Surface Modification on In‐Depth Transformations and Flexural Strength of Zirconia Ceramics

Wongkamhaeng, Kan; Dawson, Deborah V.; Holloway, Julie A.; Denry, Isabelle

doi:10.1111/jopr.12908

Cited by 30 publications

(31 citation statements)

References 54 publications

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“…55,56 It's widely used as a thermal barrier coating, selective laser sintering, gas sensor, polymer membrane filler, structural components, solid electrolytes, and medical application. 55,56 It's widely used as a thermal barrier coating, selective laser sintering, gas sensor, polymer membrane filler, structural components, solid electrolytes, and medical application.…”

Section: Current Status Of Yttria-stabilized Zirconia (Ysz)mentioning

confidence: 99%

“…Zirconia is the most popular material in the ceramic application. 55,56 It's widely used as a thermal barrier coating, selective laser sintering, gas sensor, polymer membrane filler, structural components, solid electrolytes, and medical application. 57,58 Usually, this ceramic material is used in cubic or tetragonal form and stabilized with aliovalent cations like calcium (Ca 2+ ) and yttria (Y 3+ ) to become a good O 2conductor because of high mechanical strength, high chemical stability, high corrosion resistant, high ionic conductivity, high thermal barrier and low thermal conductivity properties.…”

Section: Current Status Of Yttria-stabilized Zirconia (Ysz)mentioning

confidence: 99%

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A review on recent status and challenges of yttria stabilized zirconia modification to lowering the temperature of solid oxide fuel cells operation

et al. 2019

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Solid Oxide Fuel Cells (SOFCs) are an electrochemical energy converter that receives the world's attention as a power generation system of the future owing to its flexibility to consume various types of fuels, low emission of greenhouses gases, and having high efficiency reaching over 70%. A conventional SOFCs operates at high temperature, typically ranges between 800 to 1000°C. SOFCs use yttria-stabilized zirconia (YSZ) as the electrolyte, which exhibits excellent oxide ion conductivity in this temperature range. However, this temperature range poses an issue to SOFCs durability, as it leads to the degradation of the cell components. In addition, SOFCs application is limited and difficult to implement for the transportation sector and portable appliance. A viable solution is to lower the SOFCs operating temperature to intermediate (600 to 800°C ) or low (<600°C) operating temperature. The benefit of this way, cell durability will improve, as well as other advantages such as facilitates handling, assembling, dismantling, cost reduction, and expanded the SOFCs application. Nonetheless, the key challenge for the issue is finding suitable electrolyte, as YSZ have lower ionic conductivity at low and intermediate temperature range. The aim of this paper is to review the status and challenges in the attempts made to modify YSZ electrolyte within the past decade. The resulting ionic conductivity, microstructure, and densification, mechanical and thermal properties of these 'new' electrolytes critically reviewed. The targeted conductivity of modification of YSZ electrolyte must be exceeded >0.1 S cm -1 to enable high performance of SOFCs power generation systems to be realized for transportation and portable applications. Based on our knowledge, this paper is the first review which focused on the recent status and challenges of YSZ electrolyte towards lowering the operating temperature.

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Section: Current Status Of Yttria-stabilized Zirconia (Ysz)mentioning

confidence: 99%

Section: Current Status Of Yttria-stabilized Zirconia (Ysz)mentioning

confidence: 99%

A review on recent status and challenges of yttria stabilized zirconia modification to lowering the temperature of solid oxide fuel cells operation

et al. 2019

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“…Power analysis was based on previous studies where differences regarding the level of significance and standard deviation were detected among the zirconia-based specimens. [20][21][22][23] The differences in load to fracture of the groups were analyzed using one-way ANOVA, followed by Tukey's post hoc test (IBM SPSS Statistics v24; IBM Corp, Chicago, IL). Failure mode data were analyzed using Fisher exact test.…”

Section: Methodsmentioning

confidence: 99%

“…Both are common methods used in dental laboratories to shape interproximal embrasures of monolithic FDPs so that they appear natural, thus improving the esthetic appearance; however, there is always a risk that the connector design will become sharp and V‐shaped rather than U‐shaped and thus structurally weaken the restoration. Additionally, esthetic separation procedures carried out on a fully sintered restoration may cause damage to the zirconia surface that initiates phase transformations in the monoclinic microstructure of the material …”

mentioning

confidence: 99%

“…Additionally, esthetic separation procedures carried out on a fully sintered restoration may cause damage to the zirconia surface that initiates phase transformations in the monoclinic microstructure of the material. 1,21 The aim of this study was to investigate the load-bearing capacity and failure mode of monolithic zirconia FDPs with different connector designs gained by using different embrasure shaping methods. The null hypothesis was that there would be no difference in the load-bearing capacity and failure modes among the groups under study.…”

mentioning

confidence: 99%

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Load‐Bearing Capacity of Monolithic Zirconia Fixed Dental Prostheses Fabricated with Different Connector Designs and Embrasure Shaping Methods

Bakitian

Seweryniak

Papia

et al. 2018

Journal of Prosthodontics

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Purpose To investigate the load‐bearing capacity and failure mode of monolithic zirconia fixed dental prostheses (FDPs) fabricated with different connector designs and embrasure shaping methods. Materials and Methods Seventy four‐unit zirconia FDPs (with two premolar pontics) were fabricated and divided into seven groups (n = 10) according to the different connector designs gained by using different embrasure shaping methods. The groups were as follows: monolithic FDPs fabricated with sharp embrasures, monolithic FDPs fabricated with blunt embrasures, monolithic FDPs fabricated with blunt embrasures and no occlusal embrasures, two groups of monolithic FDPs fabricated with blunt embrasures and interproximal separations made with diamond discs at the soft stage and at the fully sintered stage, and monolithic FDPs fabricated with blunt embrasures and interproximal separation accentuated by localized porcelain build‐up. A final group was used as a control group, where fully veneered traditional zirconia FDPs were fabricated with default milling settings. The FDPs were artificially aged and loaded to fracture. Load to fracture and failure modes were analyzed by one‐way ANOVA, Tukey's post hoc test, and Fisher exact test (α = 0.05). Results The FDPs fabricated with interproximal porcelain separation showed significantly the highest load to fracture (1038 N ± 82) of all groups (p < 0.001), with no significant difference compared to the FDPs with no occlusal embrasures (934 N ± 175; p ˃ 0.29). The FDPs fabricated with blunt embrasures showed significantly higher load to fracture (873 N ± 115) compared to the FDPs in the control group (689 N ± 75) and the FDPs with sharp embrasures (417 N ± 87; p < 0.001). There were no significant differences between the FDPs with sharp embrasures (417 N ± 87) and the FDPs with interproximal disc separations (467 N ± 94; p ˃ 0.23). Failure mode of the FDPs fabricated with sharp embrasures and interproximal disc separations differed significantly compared to the FDPs in the other groups (p < 0.001). Conclusions Sharp embrasures and interproximal separations made with diamond discs significantly decrease the load‐bearing capacity of monolithic zirconia FDPs compared to FDPs made with blunt embrasures. Blunt embrasures in combination with localized porcelain build‐up produce FDPs with high load‐bearing capacity in relation to loads that might be expected under clinical use.

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Does the internal surface treatment technique for enhanced bonding affect the color, transparency, and surface roughness of ultra-transparent zirconia?

Chen,

Zhou,

et al. 2024

Clin Oral Invest

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Effect of Surface Modification on In‐Depth Transformations and Flexural Strength of Zirconia Ceramics

Abstract: Variations in mean biaxial flexural strength were explained by the balance between the depth of toughening mechanisms (phase transformation and FDS) and subsurface damage. AAF and GP groups were the most efficient surface adjustments in promoting the highest mean biaxial flexural strength.

Cited by 30 publications

References 54 publications

A review on recent status and challenges of yttria stabilized zirconia modification to lowering the temperature of solid oxide fuel cells operation

A review on recent status and challenges of yttria stabilized zirconia modification to lowering the temperature of solid oxide fuel cells operation

Load‐Bearing Capacity of Monolithic Zirconia Fixed Dental Prostheses Fabricated with Different Connector Designs and Embrasure Shaping Methods

Does the internal surface treatment technique for enhanced bonding affect the color, transparency, and surface roughness of ultra-transparent zirconia?

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