Achieving tensile superplasticity in 8 mol% Y2O3 cubic stabilized ZrO2 through the addition of intergranular silica

Dillon, R. Peter; Sosa, Siari S.; Mecartney, Martha L.

doi:10.1016/j.scriptamat.2004.03.008

Cited by 17 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For ceramic materials, the effect of second-phase dispersion on superplastic flow has been widely examined in several ZrO 2 -and Al 2 O 3 -based composites. [9][10][11][12][13][14][15][16][17][18] In particular, the flow behavior of Al 2 O 3 -dispersed t-ZrO 2 was examined for various amounts of Al 2 O 3 ranging from 20 to 80 wt%. 11 In the composites, however, HSRS as in the ZrO 2 -spinel composite cannot be attained even though fine grain sizes were achieved due to grain boundary pinning by the particles.…”

Section: Introductionmentioning

confidence: 99%

Microstructural examination in high-strain-rate superplastically deformed tetragonal ZrO₂ dispersed with 30 vol% MgAl₂O₄ spinel

et al. 2007

View full text Add to dashboard Cite

The role of MgAl 2 O 4 spinel particle dispersion for attaining high-strain-rate superplasticity (HSRS) was examined in tetragonal ZrO 2 . Microstructural examination shows that the dispersed spinel particles provide the following positive factors to ZrO 2 simultaneously: (i) stable fine grain size by retarding grain growth due to pinning effect; and (ii) enhanced accommodation due to accelerated lattice diffusivity caused by the dissolution of aluminum and magnesium into ZrO 2 from the spinel particles, and accelerated relaxation of stress concentrations exerted by grain boundary sliding through dislocation motion. These positive factors make it possible to attain HSRS in ZrO 2 .

show abstract

Section: Introductionmentioning

confidence: 99%

Microstructural examination in high-strain-rate superplastically deformed tetragonal ZrO₂ dispersed with 30 vol% MgAl₂O₄ spinel

et al. 2007

View full text Add to dashboard Cite

show abstract

“…Pre-sintering of the green body was conducted at 1273 K for 1 h, followed by machining into bars. A detailed description of the preparation was given earlier [32] and a preliminary report documented the first demonstration of superplastic deformation in cubic YSZ [33]. To achieve fully-dense samples, the bars were heat treated at 1723 K for 1 h and then sliced with a high-precision diamond blade into tensile specimens having thicknesses of 1.75 mm and gage lengths of 10.0 mm.…”

Section: Experimental Materials and Proceduresmentioning

confidence: 99%

Superplasticity and superplastic-like flow in cubic zirconia with silica

et al. 2015

Self Cite

View full text Add to dashboard Cite

Experiments were conducted at temperatures from 1573 to 1748 K to evaluate the flow properties and the potential for achieving superplasticity in an 8 mol% Y 2 O 3 -stabilized cubic ZrO 2 (termed 8Y-CSZ) containing 5 wt% colloidal SiO 2 . Tests were conducted under constant strain rate conditions and under creep conditions at constant stress. The stress exponent was determined as *1.8, and the activation energy for creep was measured as *600-670 kJ mol -1 . The results show that the presence of an amorphous second phase is effective in limiting grain growth. A maximum superplastic elongation of more than 500 % was recorded at a testing temperature of 1703 K. An analysis of the results suggests that the flow mechanism is associated with interface-controlled diffusion creep.

show abstract

“…Particularly challenging is the reliability of structural ceramic components for those applications requiring good resistance to alkali attack at high temperatures 1,2 . It has been found that many ceramics such as Al 2 O 3 , SiC, mullite, cordierite, and so on would be attacked rapidly by alkali substances in these high‐temperature applications 3–8 . Therefore, the protection of ceramics from alkali corrosion at high temperatures is important.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Mullite‐ and Zircon‐Based Ceramics Using Kaolinite and Zirconium Oxide: A Sintering Study

Mecif

Soro

Harabi

et al. 2010

Journal of the American Ceramic Society

View full text Add to dashboard Cite

International audienceThe interactions between zirconia (ZrO2) powder and three Algerian hydrated kaolinitic clays were studied at high temperatures. The analysis by X-ray diffraction of the prepared products allowed to follow the different phase developments during heat treatment and to identify the parameters controlling the zirconia conversion into zircon (ZrSiO4). It was found that ZrSiO4 formation, occurring at temperatures above 1150°C, is enhanced by the presence, in the clays, of fusing impurities such as K, Fe, Ca, and Mn, and by a decrease in zirconia particle size. A reactional mechanism, involving zirconia, a flux, and cristobalite is proposed. Moreover, the effect of zirconia additions on sintering was studied. It was also found that the increase in the porosity ratio of the final products for zirconia levels above 20 wt% was governed by a decrease in the flux amount, due to its lower clay content. Finally, it was shown that ceramics obtained by sintering at 1400°C for 2 h of a mixture of 38 wt% of fine zirconia powder and 62 wt% of the more reactive clay were mainly constituted of zircon and mullite

show abstract

Achieving tensile superplasticity in 8 mol% Y2O3 cubic stabilized ZrO2 through the addition of intergranular silica

Cited by 17 publications

References 14 publications

Microstructural examination in high-strain-rate superplastically deformed tetragonal ZrO₂ dispersed with 30 vol% MgAl₂O₄ spinel

Microstructural examination in high-strain-rate superplastically deformed tetragonal ZrO₂ dispersed with 30 vol% MgAl₂O₄ spinel

Superplasticity and superplastic-like flow in cubic zirconia with silica

Preparation of Mullite‐ and Zircon‐Based Ceramics Using Kaolinite and Zirconium Oxide: A Sintering Study

Contact Info

Product

Resources

About

Achieving tensile superplasticity in 8 mol% Y2O3 cubic stabilized ZrO2 through the addition of intergranular silica

Cited by 17 publications

References 14 publications

Microstructural examination in high-strain-rate superplastically deformed tetragonal ZrO2 dispersed with 30 vol% MgAl2O4 spinel

Microstructural examination in high-strain-rate superplastically deformed tetragonal ZrO2 dispersed with 30 vol% MgAl2O4 spinel

Superplasticity and superplastic-like flow in cubic zirconia with silica

Preparation of Mullite‐ and Zircon‐Based Ceramics Using Kaolinite and Zirconium Oxide: A Sintering Study

Contact Info

Product

Resources

About

Microstructural examination in high-strain-rate superplastically deformed tetragonal ZrO₂ dispersed with 30 vol% MgAl₂O₄ spinel

Microstructural examination in high-strain-rate superplastically deformed tetragonal ZrO₂ dispersed with 30 vol% MgAl₂O₄ spinel