Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Microstructure and Material Properties of Fibrous Al2O3-(m-ZrO2)/t-ZrO2 Composite Depending on the Volume Fraction of Core/Shell

코어/쉘 부피비에 따른 섬유상 Al2O3-(m-ZrO2)/t-ZrO2 복합재료의 미세조직 및 물성

  • Kim Ki-Hyun (School of Advanced materials Engineering, Kongju National University) ;
  • Lee Byong-Taek (School of Advanced Materials Engineering, Kongju National University)
  • 김기현 (공주대학교 신소재공학부) ;
  • 이병택 (공주대학교 신소재공학부)
  • Published : 2005.12.01
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Abstract

Fibrous $Al_2O_3-(m-ZrO_2)/t-ZrO_2$ composites having core/shell structure were fabricated by multi-extrusion process. The effect o volume fraction between core ($Al_2O_3-(m-ZrO_2)$) and shell ($t-ZrO_2$ was investigated to understand the relationship between microstructure and material properites, in which the volume fractions of core and shell were varied as 40:60, 50:50 and 60:40. The material properties o hardness and bending strength were increased as the volume fraction of core was increased, and their maximum values were about 1320 Hv and 750MPa, respectively. However, as the volume fraction of core increased, the values of relative density and fracture toughness were decreased from 97.1 to $96.5\%$ and from $6.5MPa{\cdot}m^{1/2}$ to $5.7MPa{\cdot}m^{1/2}$, respectively.

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