Creep characteristics of alumina, nickel aluminate spinel, zirconia composites

R. Peter Dillon; Dong Kyu Kim; Joy E. Trujillo; Waltraud M. Kriven; Martha L. Mecartney

doi:10.1557/jmr.2008.0071

Creep characteristics of alumina, nickel aluminate spinel, zirconia composites

R. Peter Dillon, Dong Kyu Kim, Joy E. Trujillo, Waltraud M. Kriven, Martha L. Mecartney

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

Abstract

Fine grained, three-phase ceramic composites that exhibit favorable toughness, hardness, and high room-temperature strength were evaluated for high-temperature mechanical stability. A 50vol%Al₂O₃-25vol%NiAl₂ O₄-25vol%3 mol%yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP) and a 33vol% Al₂O₃-33vol% NiAl₂O₄-33 vol%3Y-TZP composite were compression creep tested at temperatures between 1350 and 1450°C under constant stresses of 20-45 MPa. The three-phase microstructure effectively limited grain growth (average d₀ = 1.3 μm, average d_f = 1.6 μm after 65% true strain). True strain rates were 10^-4 to 10^-6 s^-1 with stress exponents n = 1.7 to 1.8 and a grain-size exponent p = 1.3. A method for compensating for grain growth is presented using stress jump tests. The apparent activation energy for high-temperature deformation for 50vol%Al₂O₃-25vol%NiAl₂ O₄-25vol%3Y-TZP was found to be 373 kJ/mol-K.

Original language	English (US)
Pages (from-to)	556-564
Number of pages	9
Journal	Journal of Materials Research
Volume	23
Issue number	2
DOIs	https://doi.org/10.1557/jmr.2008.0071
State	Published - Feb 2008

ASJC Scopus subject areas

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

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10.1557/jmr.2008.0071

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title = "Creep characteristics of alumina, nickel aluminate spinel, zirconia composites",

abstract = "Fine grained, three-phase ceramic composites that exhibit favorable toughness, hardness, and high room-temperature strength were evaluated for high-temperature mechanical stability. A 50vol%Al2O3-25vol%NiAl2 O4-25vol%3 mol%yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP) and a 33vol% Al2O3-33vol% NiAl2O4-33 vol%3Y-TZP composite were compression creep tested at temperatures between 1350 and 1450°C under constant stresses of 20-45 MPa. The three-phase microstructure effectively limited grain growth (average d0 = 1.3 μm, average df = 1.6 μm after 65% true strain). True strain rates were 10-4 to 10-6 s-1 with stress exponents n = 1.7 to 1.8 and a grain-size exponent p = 1.3. A method for compensating for grain growth is presented using stress jump tests. The apparent activation energy for high-temperature deformation for 50vol%Al2O3-25vol%NiAl2 O4-25vol%3Y-TZP was found to be 373 kJ/mol-K.",

author = "Dillon, {R. Peter} and Kim, {Dong Kyu} and Trujillo, {Joy E.} and Kriven, {Waltraud M.} and Mecartney, {Martha L.}",

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language = "English (US)",

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AU - Dillon, R. Peter

AU - Kim, Dong Kyu

AU - Trujillo, Joy E.

AU - Kriven, Waltraud M.

AU - Mecartney, Martha L.

PY - 2008/2

Y1 - 2008/2

N2 - Fine grained, three-phase ceramic composites that exhibit favorable toughness, hardness, and high room-temperature strength were evaluated for high-temperature mechanical stability. A 50vol%Al2O3-25vol%NiAl2 O4-25vol%3 mol%yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP) and a 33vol% Al2O3-33vol% NiAl2O4-33 vol%3Y-TZP composite were compression creep tested at temperatures between 1350 and 1450°C under constant stresses of 20-45 MPa. The three-phase microstructure effectively limited grain growth (average d0 = 1.3 μm, average df = 1.6 μm after 65% true strain). True strain rates were 10-4 to 10-6 s-1 with stress exponents n = 1.7 to 1.8 and a grain-size exponent p = 1.3. A method for compensating for grain growth is presented using stress jump tests. The apparent activation energy for high-temperature deformation for 50vol%Al2O3-25vol%NiAl2 O4-25vol%3Y-TZP was found to be 373 kJ/mol-K.

AB - Fine grained, three-phase ceramic composites that exhibit favorable toughness, hardness, and high room-temperature strength were evaluated for high-temperature mechanical stability. A 50vol%Al2O3-25vol%NiAl2 O4-25vol%3 mol%yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP) and a 33vol% Al2O3-33vol% NiAl2O4-33 vol%3Y-TZP composite were compression creep tested at temperatures between 1350 and 1450°C under constant stresses of 20-45 MPa. The three-phase microstructure effectively limited grain growth (average d0 = 1.3 μm, average df = 1.6 μm after 65% true strain). True strain rates were 10-4 to 10-6 s-1 with stress exponents n = 1.7 to 1.8 and a grain-size exponent p = 1.3. A method for compensating for grain growth is presented using stress jump tests. The apparent activation energy for high-temperature deformation for 50vol%Al2O3-25vol%NiAl2 O4-25vol%3Y-TZP was found to be 373 kJ/mol-K.

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Creep characteristics of alumina, nickel aluminate spinel, zirconia composites

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