Preparation and properties of the ZrO2-dispersed MgO-Al2O3 ceramics (Part 3) - Influence of MgO-Al2O3 composition -

Hiroyuki Tsuboi; Hideyuki Yoshimatsu; Tokuro Nanba; Yoshinari Miura

doi:10.2109/jcersj.105.588

Preparation and properties of the ZrO₂-dispersed MgO-Al₂O₃ ceramics (Part 3) - Influence of MgO-Al₂O₃ composition -

Hiroyuki Tsuboi, Hideyuki Yoshimatsu, Tokuro Nanba, Yoshinari Miura

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

1 Citation (Scopus)

Abstract

ZrO₂-dispersed MgO-Al₂O₃ ceramics with various MgO to Al₂O₃ compositional ratios were prepared from Mg(OH)₂ powder, α-Al₂O₃ powder and Zr-n-butoxide by calcining at 1000°C for 2h and sintering at 1600°C for 1h. The influence of the MgO-Al₂O₃ compositional ratio on the sinterability and mechanical properties was studied. Addition of 10 vol% ZrO₂ improved the relative density of the sintered specimens containing 50 and 62.5 mol% Al₂O₃. However, the addition was not effective at other compositional ratios. The bending strength was improved at composition containing more than 50 mol% Al₂O₃, where the dispersed ZrO₂ particles were in the form of tetragonal phase. The bending strength increased with increase in Al₂O₃ content in the ZrO₂ dispersed specimens. The fracture toughness was improved for all specimens by ZrO₂ dispersion, especially, for the specimen in which MgO-Al₂O₃ component was in a single crystalline phase.

Original language	English
Pages (from-to)	588-594
Number of pages	7
Journal	Journal of the Ceramic Society of Japan
Volume	105
Issue number	7
DOIs	https://doi.org/10.2109/jcersj.105.588
Publication status	Published - Jul 1997

Keywords

Bending strength
Fracture toughness
MgO-AlO ceramics
Phase transformation of ZrO
Sintering
ZrO dispersion

ASJC Scopus subject areas

Ceramics and Composites
Chemistry(all)
Condensed Matter Physics
Materials Chemistry

Access to Document

10.2109/jcersj.105.588

Cite this

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title = "Preparation and properties of the ZrO2-dispersed MgO-Al2O3 ceramics (Part 3) - Influence of MgO-Al2O3 composition -",

abstract = "ZrO2-dispersed MgO-Al2O3 ceramics with various MgO to Al2O3 compositional ratios were prepared from Mg(OH)2 powder, α-Al2O3 powder and Zr-n-butoxide by calcining at 1000°C for 2h and sintering at 1600°C for 1h. The influence of the MgO-Al2O3 compositional ratio on the sinterability and mechanical properties was studied. Addition of 10 vol% ZrO2 improved the relative density of the sintered specimens containing 50 and 62.5 mol% Al2O3. However, the addition was not effective at other compositional ratios. The bending strength was improved at composition containing more than 50 mol% Al2O3, where the dispersed ZrO2 particles were in the form of tetragonal phase. The bending strength increased with increase in Al2O3 content in the ZrO2 dispersed specimens. The fracture toughness was improved for all specimens by ZrO2 dispersion, especially, for the specimen in which MgO-Al2O3 component was in a single crystalline phase.",

keywords = "Bending strength, Fracture toughness, MgO-AlO ceramics, Phase transformation of ZrO, Sintering, ZrO dispersion",

author = "Hiroyuki Tsuboi and Hideyuki Yoshimatsu and Tokuro Nanba and Yoshinari Miura",

year = "1997",

month = jul,

doi = "10.2109/jcersj.105.588",

language = "English",

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AU - Yoshimatsu, Hideyuki

AU - Nanba, Tokuro

AU - Miura, Yoshinari

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N2 - ZrO2-dispersed MgO-Al2O3 ceramics with various MgO to Al2O3 compositional ratios were prepared from Mg(OH)2 powder, α-Al2O3 powder and Zr-n-butoxide by calcining at 1000°C for 2h and sintering at 1600°C for 1h. The influence of the MgO-Al2O3 compositional ratio on the sinterability and mechanical properties was studied. Addition of 10 vol% ZrO2 improved the relative density of the sintered specimens containing 50 and 62.5 mol% Al2O3. However, the addition was not effective at other compositional ratios. The bending strength was improved at composition containing more than 50 mol% Al2O3, where the dispersed ZrO2 particles were in the form of tetragonal phase. The bending strength increased with increase in Al2O3 content in the ZrO2 dispersed specimens. The fracture toughness was improved for all specimens by ZrO2 dispersion, especially, for the specimen in which MgO-Al2O3 component was in a single crystalline phase.

AB - ZrO2-dispersed MgO-Al2O3 ceramics with various MgO to Al2O3 compositional ratios were prepared from Mg(OH)2 powder, α-Al2O3 powder and Zr-n-butoxide by calcining at 1000°C for 2h and sintering at 1600°C for 1h. The influence of the MgO-Al2O3 compositional ratio on the sinterability and mechanical properties was studied. Addition of 10 vol% ZrO2 improved the relative density of the sintered specimens containing 50 and 62.5 mol% Al2O3. However, the addition was not effective at other compositional ratios. The bending strength was improved at composition containing more than 50 mol% Al2O3, where the dispersed ZrO2 particles were in the form of tetragonal phase. The bending strength increased with increase in Al2O3 content in the ZrO2 dispersed specimens. The fracture toughness was improved for all specimens by ZrO2 dispersion, especially, for the specimen in which MgO-Al2O3 component was in a single crystalline phase.

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