Effect of starting powders on the sintering of nanostructured

Gustavo Suárez*, Yoshio Sakka, Tohru S. Suzuki, Tetsuo Uchikoshi, Xinwen Zhu, Esteban F. Aglietti

*この研究の対応する著者

研究成果: Article査読

28 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号025004
ジャーナルScience and Technology of Advanced Materials
10
2
DOI
出版ステータスPublished - 2009
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)

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