Effect of starting powders on the sintering of nanostructured ZrO2 ceramics by colloidal processing
The effect of starting powders on the sintering of nanostructured tetragonal zirconia was evaluated. Suspensions were prepared with a concentration of 10 vol.% by mixing a bicomponent mixture of commercial powders (97 mol.% monoclinic zirconia with 3 mol.% yttria) and by dispersing commercially avai...
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2009-01-01
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Online Access: | http://www.iop.org/EJ/abstract/1468-6996/10/2/025004 |
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doaj-577aee5378aa48f59c2209137569b4cb2020-11-24T22:45:28ZengTaylor & Francis GroupScience and Technology of Advanced Materials1468-69961878-55142009-01-01102025004Effect of starting powders on the sintering of nanostructured ZrO2 ceramics by colloidal processingGustavo Suárez, Yoshio Sakka, Tohru S Suzuki, Tetsuo Uchikoshi, Xinwen Zhu and Esteban F AgliettiThe effect of starting powders on the sintering of nanostructured tetragonal zirconia was evaluated. Suspensions were prepared with a concentration of 10 vol.% by mixing a bicomponent mixture of commercial powders (97 mol.% monoclinic zirconia with 3 mol.% yttria) and by dispersing commercially available tetragonal zirconia (3YTZ, Tosoh). The preparation of the slurry by bead-milling was optimized. Colloidal processing using 50 μm zirconia beads at 4000 rpm generated a fully deagglomerated suspension leading to the formation of high-density consolidated compacts (62% of the theoretical density (TD) for the bicomponent suspension). Optimum colloidal processing of the bicomponent suspension followed by the sintering of yttria and zirconia allowed us to obtain nanostructured tetragonal zirconia. Three different sintering techniques were investigated: normal sintering, two-step sintering and spark plasma sintering. The inhibition of grain growth in the bicomponent mixed powders in comparison with 3YTZ was demonstrated. The inhibition of the grain growth may have been caused by inter-diffusion of cations during the sintering.http://www.iop.org/EJ/abstract/1468-6996/10/2/025004nanostructured zirconiacolloidal processingtwo-step sinteringspark plasma sintering (SPS) |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Gustavo Suárez, Yoshio Sakka, Tohru S Suzuki, Tetsuo Uchikoshi, Xinwen Zhu and Esteban F Aglietti |
spellingShingle |
Gustavo Suárez, Yoshio Sakka, Tohru S Suzuki, Tetsuo Uchikoshi, Xinwen Zhu and Esteban F Aglietti Effect of starting powders on the sintering of nanostructured ZrO2 ceramics by colloidal processing Science and Technology of Advanced Materials nanostructured zirconia colloidal processing two-step sintering spark plasma sintering (SPS) |
author_facet |
Gustavo Suárez, Yoshio Sakka, Tohru S Suzuki, Tetsuo Uchikoshi, Xinwen Zhu and Esteban F Aglietti |
author_sort |
Gustavo Suárez, Yoshio Sakka, Tohru S Suzuki, Tetsuo Uchikoshi, Xinwen Zhu and Esteban F Aglietti |
title |
Effect of starting powders on the sintering of nanostructured ZrO2 ceramics by colloidal processing |
title_short |
Effect of starting powders on the sintering of nanostructured ZrO2 ceramics by colloidal processing |
title_full |
Effect of starting powders on the sintering of nanostructured ZrO2 ceramics by colloidal processing |
title_fullStr |
Effect of starting powders on the sintering of nanostructured ZrO2 ceramics by colloidal processing |
title_full_unstemmed |
Effect of starting powders on the sintering of nanostructured ZrO2 ceramics by colloidal processing |
title_sort |
effect of starting powders on the sintering of nanostructured zro2 ceramics by colloidal processing |
publisher |
Taylor & Francis Group |
series |
Science and Technology of Advanced Materials |
issn |
1468-6996 1878-5514 |
publishDate |
2009-01-01 |
description |
The effect of starting powders on the sintering of nanostructured tetragonal zirconia was evaluated. Suspensions were prepared with a concentration of 10 vol.% by mixing a bicomponent mixture of commercial powders (97 mol.% monoclinic zirconia with 3 mol.% yttria) and by dispersing commercially available tetragonal zirconia (3YTZ, Tosoh). The preparation of the slurry by bead-milling was optimized. Colloidal processing using 50 μm zirconia beads at 4000 rpm generated a fully deagglomerated suspension leading to the formation of high-density consolidated compacts (62% of the theoretical density (TD) for the bicomponent suspension). Optimum colloidal processing of the bicomponent suspension followed by the sintering of yttria and zirconia allowed us to obtain nanostructured tetragonal zirconia. Three different sintering techniques were investigated: normal sintering, two-step sintering and spark plasma sintering. The inhibition of grain growth in the bicomponent mixed powders in comparison with 3YTZ was demonstrated. The inhibition of the grain growth may have been caused by inter-diffusion of cations during the sintering. |
topic |
nanostructured zirconia colloidal processing two-step sintering spark plasma sintering (SPS) |
url |
http://www.iop.org/EJ/abstract/1468-6996/10/2/025004 |
work_keys_str_mv |
AT gustavosuarezyoshiosakkatohrussuzukitetsuouchikoshixinwenzhuandestebanfaglietti effectofstartingpowdersonthesinteringofnanostructuredzro2ceramicsbycolloidalprocessing |
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1725688394022912000 |