Journal of Phase Equilibria and Diffusion

, Volume 37, Issue 6, pp 702–717 | Cite as

Experimental Liquidus Surface Projection of the Ni-Ru-Zr System

  • L. Chipise
  • B. O. Odera
  • P. K. Jain
  • S. H. Coetzee
  • N. R. Batane
  • M. P. Motsamai
  • L. A. Cornish
Article
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Abstract

SEM with EDX and XRD analyses were used to study 21 as-cast Ni-Ru-Zr alloys. Phases were distinguished by BSE image contrast, and the primary phases were determined by their dendritic morphology, with the solidification sequences derived from the microstructure. Identification of the phases was done by EDX analyses, and they were verified by XRD. From these analyses, the solidus and liquidus surface projections were drawn. Three ternary phases were found: τ1 of composition ~Zr24Ru22Ni44 (at.%), τ2 at ~Zr74Ru4Ni22 (at.%), and τ3 at ~Zr35Ru3Ni62 (at.%). Sixteen invariant reactions were identified, and the largest liquidus surface was for ~ZrRu.

Keywords

liquidus surface microstructure nickel ruthenium zirconium 
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Notes

Acknowledgments

The funding from Carnegie through RISE for the African Materials Science and Engineering Network (AMSEN) and that of the National Research Foundation of South Africa is gratefully acknowledged. The authors also thankfully acknowledge the University of Botswana and Mintek for access to research facilities.

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Copyright information

© ASM International 2016

Authors and Affiliations

  • L. Chipise
    • 1
    • 4
    • 5
    • 6
  • B. O. Odera
    • 5
    • 6
  • P. K. Jain
    • 2
    • 6
  • S. H. Coetzee
    • 3
    • 6
  • N. R. Batane
    • 1
    • 6
  • M. P. Motsamai
    • 5
  • L. A. Cornish
    • 4
    • 5
    • 6
  1. 1.Mechanical Engineering DepartmentUniversity of BotswanaGaboroneBotswana
  2. 2.Physics DepartmentUniversity of BotswanaGaboroneBotswana
  3. 3.Botswana Institute for Technology, Research and Innovation (BITRI)GaboroneBotswana
  4. 4.DST/NRF Centre of Excellence in Strong MaterialsUniversity of the Witwatersrand, WITSJohannesburgSouth Africa
  5. 5.School of Chemical and Metallurgical EngineeringUniversity of the Witwatersrand, WITSJohannesburgSouth Africa
  6. 6.African Materials Science and Engineering Network (AMSEN: A Carnegie–IAS RISE Network)University of the Witwatersrand, WITS,JohannesburgSouth Africa

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