Experimental Liquidus Surface Projection of the Ni-Ru-Zr System |
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| Authors: | L Chipise P K Jain S H Coetzee N R Batane M P Motsamai L A Cornish |
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| Affiliation: | 1.Mechanical Engineering Department,University of Botswana,Gaborone,Botswana;2.Physics Department,University of Botswana,Gaborone,Botswana;3.Botswana Institute for Technology, Research and Innovation (BITRI),Gaborone,Botswana;4.DST/NRF Centre of Excellence in Strong Materials,University of the Witwatersrand, WITS,Johannesburg,South Africa;5.School of Chemical and Metallurgical Engineering,University of the Witwatersrand, WITS,Johannesburg,South Africa;6.African Materials Science and Engineering Network (AMSEN: A Carnegie–IAS RISE Network),University of the Witwatersrand, WITS,,Johannesburg,South Africa |
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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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