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Measurement of surface tension and specific heat of Ni-18.8 at.% Si alloy melt by containerless processing

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Abstract

The surface tension and specific heat of superheated and undercooled Ni-18.8 at.% Si alloy melt have been measured by the oscillating drop method and the drop calorimetry technique in combination with electromagnetic levitation, respectively. The surface tension follows a linear relationship with temperature within the range of 1370–2100 K. The surface tension at the melting temperature and the temperature coefficient are determined to be 1.796 N/m and −3.858 × 10−4 N/m/K, respectively. The specific heat is determined to be 40.80 ± 1.435 J/mol/K over the temperature range 1296–2000 K. The maximum undercooling of 178 K is achieved in the experiments. Based on the measured data of surface tension and specific heat, the viscosity, solute diffusion coefficient, density and thermal diffusivity of liquid Ni-18.8 at.% Si alloy are calculated.

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Acknowledgements

This study was supported by the National Natural Science Foundation of China (Grant No. 50871088), NPU-FFR, Fundamental Research Foundation of Shaanxi and the Foundation of Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, P.R. China.

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Authors and Affiliations

  1. Department of Applied Physics, Northwestern Polytechnical University, Xian, 710072, China

    Chongde Cao, Limin Zhang, Xiaojun Bai & Libing Duan

  2. School of Computer Science and Technology, Northwestern Polytechnical University, Xian, 710072, China

    Fang Wang

Authors
  1. Chongde Cao
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  2. Limin Zhang
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  3. Xiaojun Bai
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  4. Libing Duan
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  5. Fang Wang
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Correspondence to Chongde Cao.

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Cao, C., Zhang, L., Bai, X. et al. Measurement of surface tension and specific heat of Ni-18.8 at.% Si alloy melt by containerless processing. J Mater Sci 46, 6243–6247 (2011). https://doi.org/10.1007/s10853-011-5557-x

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  • DOI: https://doi.org/10.1007/s10853-011-5557-x

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