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Measurements of Interdiffusion Coefficients in Liquid AuGe Alloy

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Abstract

As for alloy systems forming amorphous structure, it is very useful to pursue the diffusion mechanism of the eutectic alloys in the vicinity of the eutectic point to elucidate the amorphous developmental process. We therefore investigated interdiffusion coefficients in the liquid state of AuGe and AuSi alloy, which remarkably have the deep eutectic temperature. The diffusion experiments using a shear cell device were performed in the temperature range from 686 K to 1073 K. The acquired data seem to be reliable, because they were reproducible and overlapping well on fitting curves so that the convection would have been suppressed. As a result, the temperature dependence of the interdiffusion coefficients in the liquid AuGe alloy was expressed in the Arrhenius equation and no peculiarity in the diffusion mechanism was confirmed. The values of interdiffusion coefficient of this study would be highly appropriate considering the past experimental values of self-diffusion coefficients of AuSi alloy and the negative mixing enthalpy of the alloy system. In addition, the previous research on structure analysis in which the shoulder was not observed in the vicinity of the eutectic point supported our confirmation of the Arrhenius expression for the temperature dependence of the interdiffusion coefficients in the liquid AuGe.

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Acknowledgments

This work was performed under the inter-university cooperative research program (Proposal No.14G0050) of the Cooperative Research and Development Center for Advanced Materials, Institute for Materials Research, Tohoku University, Grants in Aid for Scientific Research ”Base study C”, Iketani Science and Technology Foundation grant, Special Coordination Funds for Promoting Science and Technology ” Waseda institute for advanced study Tenure Track Program”, and Japan aerospace exploration agency ”Diffusion Phenomena in Melts Working Group”.

We sincerely would like to express our all gratitude to Mr. Yamazaki of Institute for Material Research, Tohoku University in sample making, and to Mr. Murai, Mr. Nakagawa and Ms. Matsuo of Environmental Safety Center, Waseda University in sample analysis.

Compliance with Ethical Standards

The contents of this paper is unreported and is not contributed to another journal either. All authors transfer the copyright to MGST after the publication.

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Authors and Affiliations

  1. Department of Applied Mechanics, Faculty of Science and Engineering, Waseda University, Okubo 3-4-1, Shinjuku-ku, Tokyo, Japan

    Keiji Tanimoto, Yuki Ando & Koji Suzuki

  2. Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, Japan

    Yoshihiko Yokoyama

  3. Department of Applied Mechanics and Aerospace Engineering, Faculty of Science and Engineering, Waseda University, Okubo 3-4-1, Shinjuku-ku, Tokyo, Japan

    Shinsuke Suzuki

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  1. Keiji Tanimoto
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  2. Yuki Ando
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  3. Koji Suzuki
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  4. Yoshihiko Yokoyama
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  5. Shinsuke Suzuki
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Correspondence to Keiji Tanimoto.

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Tanimoto, K., Ando, Y., Suzuki, K. et al. Measurements of Interdiffusion Coefficients in Liquid AuGe Alloy. Microgravity Sci. Technol. 27, 345–351 (2015). https://doi.org/10.1007/s12217-015-9421-5

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  • DOI: https://doi.org/10.1007/s12217-015-9421-5

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