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Isothermal Section of the Ti-Nb-Sn Ternary System at 700 °C

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Abstract

The phase equilibrium of annealed Ti-Nb-Sn alloys was investigated by means of x-ray diffraction, scanning electron microscopy and electron probe microanalysis. Isothermal section of the Ti-Nb-Sn ternary system below 50 at.% Sn at 700 °C was constructed according to the examinational analysis. The compositions of α-Ti, β(Ti, Nb), Ti3Sn, Nb3Sn and Ti3Nb3Sn2 were confirmed. The solubility of Sn in β(Ti, Nb) region reaches up to 9.2 at.%, which is a relative large solubility, and that in α-Ti is small. The solubility in Ti3Sn reaches up to 14.9 at.% Nb, and that of Nb3Sn is 21.5 at.% Ti. The solubility range of Nb and Sn in Ti3Nb3Sn2 is approximately 26.2-39.5 and 22.6-26.6 at.%, respectively.

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Acknowledgment

The authors would like to thank for the financial support from the Major State Basic Development Program of China (973 Program) (No. 2014CB644000), National Natural Science Foundation of China (Grant No. 51371200) and Hunan Provincial Natural Science Foundation of China (No. 14JJ3124).

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Correspondence to J. L. Wang.

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Wang, J.L., Liu, L.B., Zhang, X.D. et al. Isothermal Section of the Ti-Nb-Sn Ternary System at 700 °C. J. Phase Equilib. Diffus. 35, 223–231 (2014). https://doi.org/10.1007/s11669-014-0295-9

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  • DOI: https://doi.org/10.1007/s11669-014-0295-9

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