Supplementary measurements of the primary crystalline phases of the Co-Ni-Sb and the Co-Fe-Sb ternary systems |
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Authors: | Yubi Zhang Changrong Li Zhenmin DuCuiping Guo Junqin LiMiao Liu |
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Affiliation: | a School of Materials Science and Engineering, University of Science and Technology Beijing, Xueyuan Road 30#, Haidian District Beijing 100083, China b Chongqing Instrument Materials Research Institute, Chongqing 400700, China c College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China d Institute of Chemical Defense of PLA, Beijing 102205, China |
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Abstract: | Some primary crystalline phases of the Co-Ni-Sb and the Co-Fe-Sb systems are studied on the basis of the crystalline structure analysis by X-ray diffraction (XRD), the microstructure observation by scanning electron microscopy (SEM), the composition determination by electron probe microanalysis (EPMA) and the phase equilibrium relations of the constituent binary systems. From the experimental measurements of the present work and the phase equilibrium relations of literature reports, the liquidus projections of the Co-Ni-Sb and the Co-Fe-Sb ternary systems are determined. There exist 6 primary crystalline phases in each of the ternary systems, which are γ(A1)-Fcc_A1, β(Co,Ni)3Sb-D03, γ(Co,Ni)Sb-NiAs, ζ(Co,Ni)Sb2-FeS2, η(Co,Ni)Sb3-CoAs3 and Sb-Rhombo_A7 in the Co-Ni-Sb system and γ(A1)-Fcc_A1, α(A2)-Bcc_A2, γ(Co,Fe)Sb-NiAs, ζ(Co,Fe)Sb2-FeS2, η(Co,Fe)Sb3-CoAs3 and Sb-Rhombo_A7 in the Co-Fe-Sb system. Two of invariant reactions are proposed, which are the eutectic reaction L → γ(A1) + β(Co,Ni)3Sb + γ(Co,Ni)Sb in the Co-Ni rich side of the Co-Ni-Sb system and the transition reaction L + γ(A1) → α(A2) + γ(Co,Fe)Sb in the Co-Fe rich side of the Co-Fe-Sb system. |
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Keywords: | Liquidus projection The Co-Ni-Sb system The Co-Fe-Sb system As-cast solidification |
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