In situ synthesis of heat resistant gradient composite on steel surface

  • Xiang-hong CuiEmail author
  • Feng Wang
  • Shu-qi Wang
  • Zi-run Yang
  • Ming-juan Gao
  • Min-xian Wei


A heat resistant gradient composite was synthesized in situ on steel with the self-propagating high temperature synthesis (SHS) reaction of 3Ni-Al-Ti-C system during casting. The phases, microstructure, and composition of the composite were analyzed by using an X-ray diffractometer (XRD), and a scanning electron microscope (SEM) coupled with an energy-dispersive X-ray spectroscope (EDS). The formation mechanism of the composite is also discussed. TiC/Ni3 Al/steel gradient composite is achieved by forming the gradient distributions of Fe, Ni, and Al, accompanied with the gradient variation of the microstructure from TiC/Ni3 Al, to TiC/Ni3 Al/steel, and to steel. The composite is in situ synthesized through whole reaction of 3Ni-Al-Ti-C system in liquid steel and densification procedure, and the liquid steel infiltrates into pores in the SHS product and forces liquid Ni3 Al to form self-compaction further.

Key words

steel heat resistant composite synthesis microstructure 


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Copyright information

© China Iron and Steel Research Institute Group 2009

Authors and Affiliations

  • Xiang-hong Cui
    • 1
    Email author
  • Feng Wang
    • 1
  • Shu-qi Wang
    • 1
  • Zi-run Yang
    • 1
  • Ming-juan Gao
    • 1
  • Min-xian Wei
    • 1
  1. 1.School of Materials Science and EngineeringJiangsu UniversityZhenjiang, JiangsuChina

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