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

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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.

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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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Authors and Affiliations

  1. Mechanical Engineering Department, University of Botswana, Private Bag 0022, Gaborone, Botswana

    L. Chipise & N. R. Batane

  2. Physics Department, University of Botswana, Private Bag 0022, Gaborone, Botswana

    P. K. Jain

  3. Botswana Institute for Technology, Research and Innovation (BITRI), Private Bag 0082, Gaborone, Botswana

    S. H. Coetzee

  4. DST/NRF Centre of Excellence in Strong Materials, University of the Witwatersrand, WITS, Private Bag 3, Johannesburg, South Africa

    L. Chipise & L. A. Cornish

  5. School of Chemical and Metallurgical Engineering, University of the Witwatersrand, WITS, Private Bag 3, Johannesburg, South Africa

    L. Chipise, B. O. Odera, M. P. Motsamai & L. A. Cornish

  6. African Materials Science and Engineering Network (AMSEN: A Carnegie–IAS RISE Network), University of the Witwatersrand, WITS,, Private Bag 3, Johannesburg, South Africa

    L. Chipise, B. O. Odera, P. K. Jain, S. H. Coetzee, N. R. Batane & L. A. Cornish

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  1. L. Chipise
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  2. B. O. Odera
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  7. L. A. Cornish
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Correspondence to L. Chipise.

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Chipise, L., Odera, B.O., Jain, P.K. et al. Experimental Liquidus Surface Projection of the Ni-Ru-Zr System. J. Phase Equilib. Diffus. 37, 702–717 (2016). https://doi.org/10.1007/s11669-016-0499-2

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  • DOI: https://doi.org/10.1007/s11669-016-0499-2

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