Direct observation of the liquid miscibility gap in the zirconia–silica system

Telle, Rainer; Greffrath, Fabian; Prieler, Robert

doi:10.1016/j.jeurceramsoc.2015.07.015

Cited by 33 publications

(36 citation statements)

References 18 publications

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“…The liquid silica dissociation product (that mixed with the surrounding impact melt everywhere away from the dissociation interface) is predicted to contain Zr (Fig. 1) (Telle et al, 2015), which is consistent with a halo of Zr enrichment in the surrounding glass (Fig. 2B) (Zanetti, 2015).…”

Section: Microstructures Formed By Dissociation At High T and Low P (mentioning

confidence: 58%

“…Dissociation of zircon to zirconia and silica has been constrained in laboratory experiments at ambient pressure ( Fig. 1) (Butterman and Foster, 1967;Kaiser et al, 2008;Telle et al, 2015), and has also been observed in slag from smelting of tin ore (Farthing and Pivarunas, 2015;Cavosie et al, 2016c) and in fused bedrock at nuclear blast sites (Lussier et al, in press). The stabilities of dissociation products, including polymorphs of silica (SiO 2 ), such as α-and β-quartz, tridymite, cristobalite, coesite, 172 stishovite, and liquid silica, are sourced from Swamy et al (1994) and references 173 therein (e.g., Fenner, 1913;Kennedy et al, 1962;Ostrovsky, 1966;Cohen and 174 Klement, 1967;Jackson, 1976;Yagi and Akimoto, 1976;Suito, 1977;Grattan-175 Bellew, 1978;Mirwald and Massonne, 1980;Bohlen and Boettcher, 1982;Kanzaki, 176 1990;Pacalo and Gasparik, 1990;Zhang, 1992).…”

Section: Available Data For Phase Stability and Deformationmentioning

confidence: 95%

“…The minimum temperature required for dissociation (to tetragonal ZrO 2 ) is 1690 ºC at low pressures ( 1 GPa) ( Figs 1B, 3B) (Butterman and Foster, 1967;Kaiser et al, 2008;Telle et al, 2015). The liquid silica dissociation product (that mixed with the surrounding impact melt everywhere away from the dissociation interface) is predicted to contain Zr (Fig.…”

Section: Microstructures Formed By Dissociation At High T and Low P (mentioning

confidence: 99%

“…Stish = stishovite; Coes = coesite; Tridy = tridymite; Qtz = quartz; Zrn = zircon; Bdy = baddeleyite; liq = liquid; oI and oII = orthorhombic; t = tetragonal; c = cubic. B. T-X phase diagram for ZrO 2 -ZrSiO 4 -SiO 2 system modified afterTelle et al (2015). Tridymite stability afterSwamy et al (1994).…”

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confidence: 99%

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A pressure-temperature phase diagram for zircon at extreme conditions

Timms

Erickson

Pearce

et al. 2017

Earth-Science Reviews

148

145

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Hypervelocity impact processes are uniquely capable of generating shock metamorphism, which causes mineralogical transformations and deformation that register pressure (P) and temperature (T) conditions far beyond even the most extreme conditions created by terrestrial tectonics. The mineral zircon (ZrSiO 4) responds to 26 shock deformation is various ways, including crystal-plasticity, twinning, 27 polymorphism (e.g., transformation to the isochemical mineral reidite), formation of 28 granular texture, and dissociation to ZrO 2 + SiO 2 , which provide robust 29 thermobarometers that record different extreme conditions. The importance of 30 understanding these material processes is twofold. First, these processes can mobilize 31 and redistribute trace elements, and thus be accompanied by variable degrees of 32 resetting of the U-Pb system, which is significant for the use of zircon as a 33 geochronometer. Second, some features described herein form exclusively during 34 shock events and are diagnostic criteria that can be used to confirm the hypervelocity 35 origin of suspected impact structures. We present new P-T diagrams showing the 36 phase relations of ZrSiO 4 polymorphs and associated dissociation products under extreme conditions using available empirical and theoretical constraints. We present case studies to illustrate zircon microstructures formed in extreme environments, and present electron backscatter diffraction data for grains from three impact structures (Mistastin Lake of Canada, Ries of Germany, and Acraman of Australia) that preserve different minerals and microstructures associated with different shock conditions. For each locality, we demonstrate how systematic crystallographic orientation relationships within and between minerals can be used in conjunction with the new phase diagrams to constrain the P-T history. We outline a conceptual framework for a zircon-based approach to 'extreme thermobarometry' that incorporates both direct observation of high-P and high-T phases, as well as inferences for the former existence of phases from orientation relationships in recrystallised products, a concept we refer to here as 'phase heritage'. This new approach can be used to unravel the pressure-temperature history of zircon-bearing samples that have experienced extreme conditions, such as rocks that originated in the Earth's mantle, and those shocked during impact events on Earth and other planetary bodies.

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Section: Microstructures Formed By Dissociation At High T and Low P (mentioning

confidence: 58%

Section: Available Data For Phase Stability and Deformationmentioning

confidence: 95%

Section: Microstructures Formed By Dissociation At High T and Low P (mentioning

confidence: 99%

mentioning

confidence: 99%

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A pressure-temperature phase diagram for zircon at extreme conditions

Timms

Erickson

Pearce

et al. 2017

Earth-Science Reviews

148

145

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“…Future investigations will be conducted on both heating conditions and formulations. More precisely, we could think at localized heating (e.g., by means of lasers) or hybrid binding materials, that could bind with glass powders in a nearly molecular way (on one hand, ORMOSIL class materials have been already used in ceramic additive manufacturing; on the other one, silicones may be considered as novel silica‐yielding binders …”

Section: Resultsmentioning

confidence: 99%

Comparative Analysis of Wollastonite‐Diopside Glass‐Ceramic Structures Fabricated via Stereo‐Lithography

et al. 2019

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One key feature of digital light processing consists of the high flexibility in the design of highly porous reticulated scaffolds. In the present paper, the authors report recent experiences concerning two glasses, both converted into wollastonite-diopside (CaSiO 3 -CaMgSi 2 O 6 ) glass-ceramics by viscous flow sintering of fine powders (<45 μm) with concurrent crystallization. Glass particles are homogeneously dispersed in a photosensitive polymer, selectively hardened, layer-by-layer, by exposure to visible light, forming diamond cell lattices. The printing accuracy is slightly influenced by the glass chemistry, whereas the shape maintenance, after firing at 1100 C, is observed for both compositions. The newly developed scaffolds are compared to other glass-ceramic scaffolds, previously developed on the basis of the starting glass: the adoption of a new design does not determine any substantial degradation of mechanical properties.

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Examination of the binary system Al₂O₃‐ZrO₂ by aero acoustic levitation melting

Niessen

Muehmer

Tonnesen

et al. 2021

Int J Ceramic Engine & Sci

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Al 2 O 3 -ZrO 2 composites exhibit excellent mechanical and high-temperature properties. The solidification of various hypoeutectic compositions has been studied by means of aero-acoustic levitation. A high-speed camera recorded the crystallization, to the correlation of the video stills with the observed microstructures. Solidification takes place by formation of several nuclei and subsequent growth. Nuclei are formed in the supercooled melt, entailing to a fine-grained, simultaneously solidified structure. The remaining melt between the growing nuclei is heated due to recalescence leading to primary precipitation of zirconia, followed by eutectic solidification. A consistent behavior is presented to explain the observed microstructures. Additionally, samples between 40 and 50 mol% ZrO 2 exhibit lamellar areas, which exceed the initial zirconia composition. The observed microstructure strongly indicates the existence of a liquid miscibility gap.

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Direct observation of the liquid miscibility gap in the zirconia–silica system

Cited by 33 publications

References 18 publications

A pressure-temperature phase diagram for zircon at extreme conditions

A pressure-temperature phase diagram for zircon at extreme conditions

Comparative Analysis of Wollastonite‐Diopside Glass‐Ceramic Structures Fabricated via Stereo‐Lithography

Examination of the binary system Al₂O₃‐ZrO₂ by aero acoustic levitation melting

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Direct observation of the liquid miscibility gap in the zirconia–silica system

Cited by 33 publications

References 18 publications

A pressure-temperature phase diagram for zircon at extreme conditions

A pressure-temperature phase diagram for zircon at extreme conditions

Comparative Analysis of Wollastonite‐Diopside Glass‐Ceramic Structures Fabricated via Stereo‐Lithography

Examination of the binary system Al2O3‐ZrO2 by aero acoustic levitation melting

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Examination of the binary system Al₂O₃‐ZrO₂ by aero acoustic levitation melting