Observations on the Stabilization of Zirconia

Weber, B. C.; Garrett, H. J.; Mauer, F. A.; Schwartz, Murray A.

doi:10.1111/j.1151-2916.1956.tb15645.x

Cited by 75 publications

(34 citation statements)

References 22 publications

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“…Such effect of small amount of titanium in zirconia ceramics was reported more than 50 years ago [7], but at that time, convenient ceramic powder with several hundred micron crystallites size and metallic powder with comparable grain size were used. In our case, with tiny size of ceramic crystallites, another method of metal particle addition was implemented; fragments of ZrO 2 /CNTs aerogels were immersed in AgNO 3 solution and exposed to ultraviolet radiation with simultaneous sonication for process homogeneity.…”

Section: Figmentioning

confidence: 98%

Modification of the mechanical properties of zirconium dioxide ceramics by means of multiwalled carbon nanotubes

Lyapunova¹,

Uvarov²,

Grigoriev³

et al. 2016

Nanosystems: Phys. Chem. Math.

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A ceramic matrix composite based on zirconium dioxide doped with carbon nanotubes (CNTs) and metallic silver as a plastic binder was produced by hydrothermal synthesis from ceramic precursor and a CNTs suspension followed by critical point drying of the synthesized hydrogel and metallic silver deposition on ceramic composite aerogel fragments from a AgNO 3 solution. Multi-indentation loading of the composite has revealed two types of mechanical response: 1) hardness decreasing with an increasing of number of cycles and 2) significant increasing of hardness with an increasing number of indentations. Local chemical composition analysis has revealed correlations between the composite hardness and the presence oxygen atoms for first type and silver and yttrium atoms for second type of mechanical response respectively.

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Section: Figmentioning

confidence: 98%

Modification of the mechanical properties of zirconium dioxide ceramics by means of multiwalled carbon nanotubes

Lyapunova¹,

Uvarov²,

Grigoriev³

et al. 2016

Nanosystems: Phys. Chem. Math.

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“…Webber at al. [9] showed the partial limited solubility of Ti into ZrO 2 and the effect of the blackening of zirconia through the formation of oxygen deficiencies [9]. The research conducted by Ruh [10] showed that the maximum quantity of titanium was dissolved in the ZrO 2 in an amount about 4 at.%.…”

Section: Introductionmentioning

confidence: 99%

“…For example, the partial solubility of titanium along the grain boundaries of ZrO 2 without creation of the new phase was found on the based on many studies [8][9][10]. Webber at al.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Characterization of Composite from ZrO2 – Ti System

Łada¹,

Miazga²,

Bazarnik³

et al. 2017

Archives of Metallurgy and Materials

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In this work the microstructure analysis of composite from ZrO 2 -Ti system were presented. For the preparation of the composite samples nanometric ZrO 2 powder stabilized by 3 mol% of Y 2 O 3 and micrometric titanium powder were used. The composites with 10 vol.% addition of titanium particles were prepared by slip casting method. The sintering process was conducted at 1450°C with 2 hours' dwell time, in the inert atmosphere of argon. The microstructure observations were carried out with the use of SEM and STEM microscopes. The quantitative analysis and stereological characterization were performed. The SEM and STEM observations allowed characterizing the microstructure of composite samples. Especially, the interface between titanium particles and zirconia matrix was described. The growth of the zirconia grains around the Ti rich areas was observed. The increase of the zirconia grains size results from the reaction on the interface between titanium particle and zirconia matrix during the sintering process.

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“…The study of reaction between zirconia and titanium was subject of the many researches. The first studies of the ZrO 2 -Ti system were carried out for the stabilization of zirconia by various kinds of dopants and the reaction of liquid titanium and its alloys due to the problem with ceramic molds for casting [14,15]. The observations of the reaction between titanium and ZrO 2 led to further studies at temperatures below the melting point of titanium [16,17].…”

Section: Introductionmentioning

confidence: 99%

Sintering behavior and thermal expansion of zirconia–titanium composites

Łada

Miazga

Konopka

et al. 2017

J Therm Anal Calorim

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The dilatometric and thermogravimetric methods were used to investigate the sintering conditions of 3Y-ZrO 2 and 3Y-ZrO 2 -Ti composites. For the materials preparation, the nanometric zirconia stabilized by 3 mol% Y 2 O 3 powder and micrometric titanium powder (3 and 10 vol%) were used. The green body samples were formed by slip casting method. The morphology of samples microstructures was determined by SEM observations. The stereological analysis of zirconia and zirconia-titanium composites was carried out using computer program. The density was measured using the Archimedes method. The hardness of sinters was also investigated. Addition of Ti into ZrO 2 influenced the sintering behavior and thermal expansion of obtained composites. The analysis of the sintering process and characteristic temperatures confirmed the increase of onset and final temperature of shrinkage with the increase in Ti content. The changes of the thermal expansion curves for the pure zirconia and 3Y-ZrO 2 -Ti composites were the result of the aTi ? bTi transformation and the transition temperature of the zirconia m ? t transformation. The zirconia and composite samples were characterized by relative density about 98%, close to theoretical density. The slight growth of zirconia grains was observed.

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Observations on the Stabilization of Zirconia

Cited by 75 publications

References 22 publications

Modification of the mechanical properties of zirconium dioxide ceramics by means of multiwalled carbon nanotubes

Modification of the mechanical properties of zirconium dioxide ceramics by means of multiwalled carbon nanotubes

Microstructure Characterization of Composite from ZrO2 – Ti System

Sintering behavior and thermal expansion of zirconia–titanium composites

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