Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
권호 표지

Microstructure and Mechanical Properties of Tantalum-Continuous-Fiber-Reinforced Amorphous Matrix Composites Fabricated by Liquid Pressing Process

액상가압공정으로 제조된 탄탈륨 연속섬유 강화 비정질 복합재료의 미세조직과 기계적 성질

  • Lee, Kyuhong (Center for Advanced Aerospace Materials Pohang University of Science and Technology) ;
  • Lee, Sang-Bok (Composite Materials Laboratory Korea Institute of Materials Science) ;
  • Lee, Sang-Kwan (Composite Materials Laboratory Korea Institute of Materials Science) ;
  • Lee, Sunghak (Center for Advanced Aerospace Materials Pohang University of Science and Technology)
  • 이규홍 (포항공과대학교 항공재료연구센터) ;
  • 이상복 (한국기계연구원 부설 재료연구소 복합재료팀) ;
  • 이상관 (한국기계연구원 부설 재료연구소 복합재료팀) ;
  • 이성확 (포항공과대학교 항공재료연구센터)
  • Received : 2008.01.21
  • Published : 2008.07.25
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Abstract

Zr-based amorphous alloy matrix composites reinforced with tantalum continuous fibers were fabricated by liquid pressing process, and their microstructures and mechanical properties were investigated. About 60 vol.% of tantalum fibers were homogeneously distributed inside the amorphous matrix, which contained a small amount of polygonal crystalline particles. The ductility of the tantalum-continuous-fiber-reinforced composite under tensile or compressive loading was dramatically improved over that of the monolithic amorphous alloy, while maintaining high strength. The consequential observation of the tensile deformation and fracture behavior of the composite showed the formation of multiple shear bands and multiple necking, crack deflection in the amorphous matrix, and obstruction of crack propagation by ductile fibers, thereby resulting in very high tensile elongation of 7.2%. These findings suggested that the liquid pressing process was useful for the development of amorphous matrix composites with improved ductility.

Keywords

Acknowledgement

Grant : 고연성 금속섬유강화 비정질 복합재료 개발

Supported by : 재료연구소, 한국과학재단

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