Fabrication of Dense ZrO2-Based Nano/Nano Type Composites by New Powder Preparation Method and Controlled Sintering Process

M. Yoshimura; M. Sando; Y. H. Choa; T. Sekino; K. Niihara

Fabrication of Dense ZrO₂-Based Nano/Nano Type Composites by New Powder Preparation Method and Controlled Sintering Process

M. Yoshimura, M. Sando, Y. H. Choa, T. Sekino, K. Niihara

Institute of Multidisciplinary Research for Advanced Materials (IMRAM)

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Fully densitified nano/nano type composites of ZrO₂/Al₂O₃ were fabricated by a pulse electric current sintering (PECS) method. The starting solid-solution powders with a size less than 10nm were successfully synthesized by a chemical process. Fast sintering with a high heating rates exhibited more enhanced denstification than slow sintering. Also, the grain size of the material by fast sintering was less than that by slow sintering. TEM observation showed that yttrium-stabilized ZrO₂/10mol%Al₂O₃ composite consisted of homogeneous and very fine ZrO₂ matrix grains less than 50nm, and that Al₂O₃ particles with a few nano-meters were homogeneously dispersed into the ZrO₂ matrix. The obtained mamocomposites showed significantly improved mechanical properties and plasticity at low temperature.

Original language	English
Pages (from-to)	423-426
Number of pages	4
Journal	Key Engineering Materials
Volume	161-163
Publication status	Published - 1999

Keywords

Nanocomposites
Pulse Electric Current Sintering
Zirconium Oxide

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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abstract = "Fully densitified nano/nano type composites of ZrO2/Al2O3 were fabricated by a pulse electric current sintering (PECS) method. The starting solid-solution powders with a size less than 10nm were successfully synthesized by a chemical process. Fast sintering with a high heating rates exhibited more enhanced denstification than slow sintering. Also, the grain size of the material by fast sintering was less than that by slow sintering. TEM observation showed that yttrium-stabilized ZrO2/10mol%Al2O3 composite consisted of homogeneous and very fine ZrO2 matrix grains less than 50nm, and that Al2O3 particles with a few nano-meters were homogeneously dispersed into the ZrO2 matrix. The obtained mamocomposites showed significantly improved mechanical properties and plasticity at low temperature.",

keywords = "Nanocomposites, Pulse Electric Current Sintering, Zirconium Oxide",

author = "M. Yoshimura and M. Sando and Choa, {Y. H.} and T. Sekino and K. Niihara",

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language = "English",

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AU - Yoshimura, M.

AU - Sando, M.

AU - Choa, Y. H.

AU - Sekino, T.

AU - Niihara, K.

PY - 1999

Y1 - 1999

N2 - Fully densitified nano/nano type composites of ZrO2/Al2O3 were fabricated by a pulse electric current sintering (PECS) method. The starting solid-solution powders with a size less than 10nm were successfully synthesized by a chemical process. Fast sintering with a high heating rates exhibited more enhanced denstification than slow sintering. Also, the grain size of the material by fast sintering was less than that by slow sintering. TEM observation showed that yttrium-stabilized ZrO2/10mol%Al2O3 composite consisted of homogeneous and very fine ZrO2 matrix grains less than 50nm, and that Al2O3 particles with a few nano-meters were homogeneously dispersed into the ZrO2 matrix. The obtained mamocomposites showed significantly improved mechanical properties and plasticity at low temperature.

AB - Fully densitified nano/nano type composites of ZrO2/Al2O3 were fabricated by a pulse electric current sintering (PECS) method. The starting solid-solution powders with a size less than 10nm were successfully synthesized by a chemical process. Fast sintering with a high heating rates exhibited more enhanced denstification than slow sintering. Also, the grain size of the material by fast sintering was less than that by slow sintering. TEM observation showed that yttrium-stabilized ZrO2/10mol%Al2O3 composite consisted of homogeneous and very fine ZrO2 matrix grains less than 50nm, and that Al2O3 particles with a few nano-meters were homogeneously dispersed into the ZrO2 matrix. The obtained mamocomposites showed significantly improved mechanical properties and plasticity at low temperature.

KW - Nanocomposites

KW - Pulse Electric Current Sintering

KW - Zirconium Oxide

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