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Microstructures and material properties of fibrous Al2O3–(m-ZrO2)/t-ZrO2 composites fabricated by a fibrous monolithic process

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Abstract

Al2O3–(m-ZrO2)/t-ZrO2 composite having fibrous and homogeneous microstructure was successfully fabricated using a fibrous monolithic process. The composites had a homogeneous microstructure as well as good interfaces between the Al2O3–(m-ZrO2) and t-ZrO2 phases. The thickness of each phases were reduced to 375, 50, 5 μm, and 0.7 μm as the number of extrusion passes increased up to 5. The material properties of density, hardness, bending strength, and fracture toughness increased as the passes of extrusion were increased up to a fifth pass, and their maximum values were about 98.5%, 1230 Hv, 570 MPa, and 6.5 MPaμm1/2, respectively. The fracture toughnesses in the direction of longitudinal and transverse direction of the fifth passed sample showed the different values with about 6.5 and 5.4 MPaμm1/2, respectively.

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Authors and Affiliations

  1. School of Advanced Materials Engineering, Kongju National University, Kongju City, Chungnam, 314-701, Korea

    Byong-Taek Lee, Ki-Hyun Kim & Jae-Kil Han

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  1. Byong-Taek Lee
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  2. Ki-Hyun Kim
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  3. Jae-Kil Han
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Correspondence to Byong-Taek Lee.

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Lee, BT., Kim, KH. & Han, JK. Microstructures and material properties of fibrous Al2O3–(m-ZrO2)/t-ZrO2 composites fabricated by a fibrous monolithic process. Journal of Materials Research 19, 3234–3241 (2004). https://doi.org/10.1557/JMR.2044.0414

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  • DOI: https://doi.org/10.1557/JMR.2044.0414

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