Superplasticity in multi-phase alumina-based composites

A. Foucault; Y. Takigawa; Y. Ikuhara; T. Sakuma

doi:10.4028/www.scientific.net/msf.304-306.537

Superplasticity in multi-phase alumina-based composites

A. Foucault, Y. Takigawa, Y. Ikuhara, T. Sakuma

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

Abstract

High-temperature superplasticity in Al₂O₃-20vol%spinel (MgAl₂O₄) containing 5,10, 20 and 30vol% of ZrO₂ was examined at temperatures between 1400 and 1500°C. The dispersion of ZrO₂ significantly reduces the flow stress during tensile tests in comparison with pure Al₂O₃-20vol%spinel. Flow stress around 10 MPa arc obtained at 1450°C for 20vol% and 30vol%ZrO₂ materials and at a strain rate of 1.3×10^-4s^-1. The flow stress reduction is explained by a decrease in grain growth due to ZrO₂ dispersion and by a high increase in diffusion through D_o parameter.

Original language	English
Pages (from-to)	537-542
Number of pages	6
Journal	Materials Science Forum
Volume	304-306
DOIs	https://doi.org/10.4028/www.scientific.net/msf.304-306.537
Publication status	Published - 1999
Externally published	Yes

Keywords

Alumina
Ceramics
Magnesia spinel
Superplasticity
Zirconia

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Superplasticity in multi-phase alumina-based composites",

abstract = "High-temperature superplasticity in Al2O3-20vol%spinel (MgAl2O4) containing 5,10, 20 and 30vol% of ZrO2 was examined at temperatures between 1400 and 1500°C. The dispersion of ZrO2 significantly reduces the flow stress during tensile tests in comparison with pure Al2O3-20vol%spinel. Flow stress around 10 MPa arc obtained at 1450°C for 20vol% and 30vol%ZrO2 materials and at a strain rate of 1.3×10-4s-1. The flow stress reduction is explained by a decrease in grain growth due to ZrO2 dispersion and by a high increase in diffusion through Do parameter.",

keywords = "Alumina, Ceramics, Magnesia spinel, Superplasticity, Zirconia",

author = "A. Foucault and Y. Takigawa and Y. Ikuhara and T. Sakuma",

year = "1999",

doi = "10.4028/www.scientific.net/msf.304-306.537",

language = "English",

volume = "304-306",

pages = "537--542",

journal = "Materials Science Forum",

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T1 - Superplasticity in multi-phase alumina-based composites

AU - Foucault, A.

AU - Takigawa, Y.

AU - Ikuhara, Y.

AU - Sakuma, T.

PY - 1999

Y1 - 1999

N2 - High-temperature superplasticity in Al2O3-20vol%spinel (MgAl2O4) containing 5,10, 20 and 30vol% of ZrO2 was examined at temperatures between 1400 and 1500°C. The dispersion of ZrO2 significantly reduces the flow stress during tensile tests in comparison with pure Al2O3-20vol%spinel. Flow stress around 10 MPa arc obtained at 1450°C for 20vol% and 30vol%ZrO2 materials and at a strain rate of 1.3×10-4s-1. The flow stress reduction is explained by a decrease in grain growth due to ZrO2 dispersion and by a high increase in diffusion through Do parameter.

AB - High-temperature superplasticity in Al2O3-20vol%spinel (MgAl2O4) containing 5,10, 20 and 30vol% of ZrO2 was examined at temperatures between 1400 and 1500°C. The dispersion of ZrO2 significantly reduces the flow stress during tensile tests in comparison with pure Al2O3-20vol%spinel. Flow stress around 10 MPa arc obtained at 1450°C for 20vol% and 30vol%ZrO2 materials and at a strain rate of 1.3×10-4s-1. The flow stress reduction is explained by a decrease in grain growth due to ZrO2 dispersion and by a high increase in diffusion through Do parameter.

KW - Alumina

KW - Ceramics

KW - Magnesia spinel

KW - Superplasticity

KW - Zirconia

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EP - 542

JO - Materials Science Forum

JF - Materials Science Forum

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Superplasticity in multi-phase alumina-based composites

Abstract

Keywords

ASJC Scopus subject areas

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