Metallurgical and Materials Transactions A

, Volume 33, Issue 4, pp 995–1002 | Cite as

Phase equilibria of the ternary Ni-Cr-Zr system and interfacial reactions in the Ni-Cr/Zr couples

  • Shyh-Jye Luo
  • Chao-Hong Wang
  • Sinn-Wen Chen
Article
Received:

Abstract

The phase equilibria of the ternary Ni-Cr-Zr system and interfacial reactions in the Ni-Cr/Zr couples at 900 °C were determined. Fifty alloys were prepared from pure Ni, Cr, and Zr. The alloys were metallographically analyzed. Both X-ray diffraction and electron-probe microanalysis (EPMA) were carried out for structural identification and compositional analysis of phases formed in these alloys. At 900 °C, the Cr-Ni10Zr7 two-phase region divides the system into two halves. ZrCr2(C14) exists in the Zr-Cr-Ni10Zr7 half, and the ZrCr2 (C15) phase has an extensive ternary solubility. In the Cr-Ni10Zr7-Ni half, except for the Ni7Zr2 phase, most of the binary Zr-Ni compounds are in equilibrium with either Cr or Ni phase. Reaction-couple techniques were used for the interfacial reaction study. The reaction path was Zr/NiZr2/NiZr/Ni10Zr7/Ni21Zr8/Cr/Ni-Cr alloy in the Ni-Cr/Zr couples examined in this study. The results indicate that Ni is the fastest-diffusing species, while Cr is the slowest one.

Keywords

Material Transaction Interfacial Reaction Isothermal Section Reaction Layer Annealed Alloy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© ASM International & TMS-The Minerals, Metals and Materials Society 2002

Authors and Affiliations

  • Shyh-Jye Luo
    • 1
  • Chao-Hong Wang
    • 1
  • Sinn-Wen Chen
    • 1
  1. 1.the Department of Chemical EngineeringNational Tsing-Hua UniversityTaiwan 300, Republic of China

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