Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Properties and Fabrication of Nanostructured 2/3 Cr-ZrO2 Composite for Artificial Joint by Rapid Sinerting

급속 소결에 의한 인공관절용 나노구조 2/3 Cr-ZrO2 복합재료 제조 및 특성

  • Kang, Hyun-Su (Division of Advanced Materials Engineering and the Research Center of Hydrogen and Fuel Cell, Engineering College, Chonbuk National University) ;
  • Kang, Bo-Ram (Division of Advanced Materials Engineering and the Research Center of Hydrogen and Fuel Cell, Engineering College, Chonbuk National University) ;
  • Shon, In-Jin (Division of Advanced Materials Engineering and the Research Center of Hydrogen and Fuel Cell, Engineering College, Chonbuk National University)
  • 강현수 (전북대학교 신소재공학부 수소연료전지 연구센터) ;
  • 강보람 (전북대학교 신소재공학부 수소연료전지 연구센터) ;
  • 손인진 (전북대학교 신소재공학부 수소연료전지 연구센터)
  • Received : 2014.06.30
  • Accepted : 2014.08.19
  • Published : 2014.09.27
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Abstract

Despite having many attractive properties, $ZrO_2$ ceramic has a low fracture toughness which limits its wide application. One of the most obvious tactics to improve its mechanical properties has been to add a reinforcing agent to formulate a nanostructured composite material. Nanopowders of $ZrO_2$ and Cr were synthesized from $CrO_3$ and Zr powder by high energy ball milling for 10 h. Dense nanocrystalline $2/3Cr-ZrO_2$ composite was consolidated by a high-frequency induction heated sintering method within 5 min at $600^{\circ}C$ from mechanically synthesized powder. The method was found to enable not only rapid densification but also the inhibition of grain growth, preserving the nano-scale microstructure. Highly dense $2/3Cr-ZrO_2$ composite with relative density of up to 99.5% was produced under simultaneous application of a 1 GPa pressure and the induced current. The hardness and fracture toughness of the composite were 534 kg/mm2 and $7MPa{\cdot}m1/2$, respectively. The composite was determined to have good biocompatibility.

Keywords

References

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