Journal of Materials Science

, Volume 21, Issue 10, pp 3653–3660 | Cite as

Effect of transition elements on the properties of MC carbides in IN-100 nickel-based superalloy

  • Yoshinori Murata
  • Kiyoshi Suga
  • Natsuo Yukawa


The effect of nine transition elements on the morphology, distribution and composition of MC carbides (MCs) in a nickel-base superalloy, IN-100, was investigated by differential thermal analysis (DTA), microstructural observation and X-ray microanalysis. The doping with tantalum, tungsten and molybdenum caused a significant change in the morphology and distribution of MCs as well as the profile of DTA curve of IN-100. The compositions of the MC in IN-100 were TiC and (Ti0.80Mo0.17V0.03) C, and the doping with niobium, tantalum and tungsten changed significantly the composition of MC. On the other hand, the doping with chromium, vanadium, hafnium and zirconium scarcely changed the composition. In addition to TiC and (Ti, Mo, V) C, zirconium- and hafnium-rich MCs were found in the zirconium- and hafnium-doped alloys, respectively. The effect of the dopants on the composition of MCs could be explained by a relationship between the metallic radius and the free energy of formation for the MC.


Zirconium Carbide Chromium Free Energy Tungsten 
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Copyright information

© Chapman and Hall Ltd 1986

Authors and Affiliations

  • Yoshinori Murata
    • 1
  • Kiyoshi Suga
    • 1
  • Natsuo Yukawa
    • 1
  1. 1.Department of Production Systems EngineeringToyohashi University of TechnologyToyohashiJapan

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