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

Published online by Cambridge University Press:  01 November 2004

Byong-Taek Lee ,
Ki-Hyun Kim  and
Jae-Kil Han
Byong-Taek Lee*
Affiliation:
School of Advanced Materials Engineering, Kongju National University, Kongju City, Chungnam 314-701, Korea
Ki-Hyun Kim
Affiliation:
School of Advanced Materials Engineering, Kongju National University, Kongju City, Chungnam 314-701, Korea
Jae-Kil Han
Affiliation:
School of Advanced Materials Engineering, Kongju National University, Kongju City, Chungnam 314-701, Korea
*
a) Address all correspondence to this author. e-mail: lbt@kongju.ac.kr
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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 MPa⋅m1/2, 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 MPa⋅m1/2, respectively.

Keywords

CompositeMechanical propertiesMicrostructure

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Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 11 , November 2004 , pp. 3234 - 3241
Copyright
Copyright © Materials Research Society 2004

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