Mechanical properties and fracture behaviour of ZrO2-Y2O3 ceramics

Aloysius J.A. Winnubst, Klaas Keizer, A.J. Burggraaf

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Abstract

Stabilized ZrO2-Y2O3 ceramics have been prepared with varying grain sizes and microstructures with the help of different preparation techniques. Bi2O3 has been added as a sinter aid to some of the samples. This results in a certain amount of a zirconia-rich second phase. For Bi2O3-free samples the fracture toughness (K lc), and therefore the fracture energy, increases with decreasing grain size. A linear relation with the inverse square root of the average grain size is found. The highest value ofK lc amounts to 4.1 MPa m1/2. Fracture toughness values of 1.9±0.2 MPa m1/2 are measured for Bi2O3 containing materials. The fracture surfaces are intergrannular for Bi2O3-containing and transgranular for Bi2O3-free samples, respectively.
Original languageUndefined
Pages (from-to)1958-1966
JournalJournal of materials science
Volume18
Issue number7
DOIs
Publication statusPublished - 1983

Keywords

  • IR-61530

Cite this

Winnubst, Aloysius J.A. ; Keizer, Klaas ; Burggraaf, A.J. / Mechanical properties and fracture behaviour of ZrO2-Y2O3 ceramics. In: Journal of materials science. 1983 ; Vol. 18, No. 7. pp. 1958-1966.
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abstract = "Stabilized ZrO2-Y2O3 ceramics have been prepared with varying grain sizes and microstructures with the help of different preparation techniques. Bi2O3 has been added as a sinter aid to some of the samples. This results in a certain amount of a zirconia-rich second phase. For Bi2O3-free samples the fracture toughness (K lc), and therefore the fracture energy, increases with decreasing grain size. A linear relation with the inverse square root of the average grain size is found. The highest value ofK lc amounts to 4.1 MPa m1/2. Fracture toughness values of 1.9±0.2 MPa m1/2 are measured for Bi2O3 containing materials. The fracture surfaces are intergrannular for Bi2O3-containing and transgranular for Bi2O3-free samples, respectively.",
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Mechanical properties and fracture behaviour of ZrO2-Y2O3 ceramics. / Winnubst, Aloysius J.A.; Keizer, Klaas; Burggraaf, A.J.

In: Journal of materials science, Vol. 18, No. 7, 1983, p. 1958-1966.

Research output: Contribution to journalArticleAcademic

TY - JOUR

T1 - Mechanical properties and fracture behaviour of ZrO2-Y2O3 ceramics

AU - Winnubst, Aloysius J.A.

AU - Keizer, Klaas

AU - Burggraaf, A.J.

PY - 1983

Y1 - 1983

N2 - Stabilized ZrO2-Y2O3 ceramics have been prepared with varying grain sizes and microstructures with the help of different preparation techniques. Bi2O3 has been added as a sinter aid to some of the samples. This results in a certain amount of a zirconia-rich second phase. For Bi2O3-free samples the fracture toughness (K lc), and therefore the fracture energy, increases with decreasing grain size. A linear relation with the inverse square root of the average grain size is found. The highest value ofK lc amounts to 4.1 MPa m1/2. Fracture toughness values of 1.9±0.2 MPa m1/2 are measured for Bi2O3 containing materials. The fracture surfaces are intergrannular for Bi2O3-containing and transgranular for Bi2O3-free samples, respectively.

AB - Stabilized ZrO2-Y2O3 ceramics have been prepared with varying grain sizes and microstructures with the help of different preparation techniques. Bi2O3 has been added as a sinter aid to some of the samples. This results in a certain amount of a zirconia-rich second phase. For Bi2O3-free samples the fracture toughness (K lc), and therefore the fracture energy, increases with decreasing grain size. A linear relation with the inverse square root of the average grain size is found. The highest value ofK lc amounts to 4.1 MPa m1/2. Fracture toughness values of 1.9±0.2 MPa m1/2 are measured for Bi2O3 containing materials. The fracture surfaces are intergrannular for Bi2O3-containing and transgranular for Bi2O3-free samples, respectively.

KW - IR-61530

U2 - 10.1007/BF00554988

DO - 10.1007/BF00554988

M3 - Article

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SP - 1958

EP - 1966

JO - Journal of materials science

JF - Journal of materials science

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