HTC 2012

Journal of Materials Science

, Volume 47, Issue 24, pp 8360-8366

Phase separation in monotectic alloys as a route for liquid state fabrication of composite materials

  • I. KabanAffiliated withIFW Dresden, Institute for Complex Materials Email author 
  • , M. KöhlerAffiliated withInstitut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR)
  • , L. RatkeAffiliated withInstitut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR)
  • , R. NowakAffiliated withCenter for High-Temperature Studies, Foundry Research Institute
  • , N. SobczakAffiliated withCenter for High-Temperature Studies, Foundry Research Institute
  • , N. MatternAffiliated withIFW Dresden, Institute for Complex Materials
  • , J. EckertAffiliated withIFW Dresden, Institute for Complex MaterialsTU Dresden, Institute of Materials Science
  • , A. L. GreerAffiliated withDepartment of Materials Science & Metallurgy, University of Cambridge
  • , S. W. SohnAffiliated withDepartment of Metallurgical Engineering, Center for Noncrystalline Materials, Yonsei University
    • , D. H. KimAffiliated withDepartment of Metallurgical Engineering, Center for Noncrystalline Materials, Yonsei University

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Abstract

The mechanism of liquid–liquid phase separation and factors determining the solid-state microstructure of monotectic alloys are discussed. The effect of the cooling rate on the phase-separated morphology is shown in examples of Al–In, Al–Pb, Ni–Nb–Y and Zr–Gd–Co–Al alloys solidified by different techniques. A remarkable improvement of the microstructure for the Al91Pb9 hypermonotectic alloy cast with TiB2 particles, which catalyze the phase separation, is demonstrated.