Hardness and Fracture Toughness of Alumina-Doped Tetragonal Zirconia with Different Yttria Contents
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- Vasylkiv Oleg
- National Institute for Materials Science Institute for Materials Science, NASU 3
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- Sakka Yoshio
- National Institute for Materials Science
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- Skorokhod Valeriy V.
- Institute for Materials Science, NASU 3
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The 0.75 to 3.0 mol% Y2O3-stabilized tetragonal ZrO2 (Y-TZP) and Al2O3/Y-TZP fine-grained ceramics with 0.2 to 0.7 mass% of alumina were produced by a colloidal technique and low-temperature sintering. Trace alumina addition enhanced the densification of Y-TZP. The influence of the resulting density, microstructure, the yttria-stabilizer and the alumina content on the hardness and toughness were studied. The bulk 2.7Y-TZP ceramic with an average grain size of 110 nm reached a hardness of 13.6 GPa and fracture toughness of 11.2 MPa·m1⁄2. Y-TZP ceramics with a reduced yttria-stabilizer content were found to reach a fracture toughness of 13.8 MPa·m1⁄2 (2Y-TZP), and 14.5 MPa·m1⁄2 (1.5Y-TZP). A nano-grained alumina dispersed zirconia with 3 mol% Y2O3 with an average grain size of 97 nm was obtained, and the hardness increased to 16.8 GPa. Y-TZP/alumina ceramics with a 0.35 mass% Al2O3 were found to reach a fracture toughness of 15.7 MPa·m1⁄2 (2Y) and 15.3 MPa·m1⁄2 (1.5Y).
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 44 (10), 2235-2238, 2003
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390282679225027584
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- NII論文ID
- 10011916390
- 30018850657
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- NII書誌ID
- AA1151294X
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- COI
- 1:CAS:528:DC%2BD3sXptFOnsbc%3D
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- ISSN
- 13475320
- 13459678
- http://id.crossref.org/issn/09161821
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- NDL書誌ID
- 6722598
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可