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Transformation Behavior of TiNiPt Thin Films Fabricated Using Melt Spinning Technique

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Abstract

Martensitic transformation behavior of Ti50Ni40Pt10 (TiNiPt) melt-spun ribbons were investigated where the heat treatment temperature was systematically changed from 473K to 773K. A hot-forged bulk TiNiPt material with the similar chemical composition was also tested as a comparison. θ-2θ X-ray diffraction analysis and transmission electron microscopy observation revealed that the as-spun ribbons were fully crystallized. The apparent phases of as-spun ribbons at room temperature are both B19 martensite and B2 parent phase instead of B2 single phase for the hot-forged bulk material. No precipitates were found in as-spun and heat-treated ribbons. It was revealed by differential scanning calorimetry that all the specimens exhibit one-step transformation. The martensitic transformation temperatures of the TiNiPt as-spun ribbons are 100K higher than those of the hot-forged bulk material, and the martensitic transformation temperature decreases with increasing heat treatment temperature.

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Acknowledgements

This work was partially supported by Grant-in-Aid for Fundamental Scientific Research (Wakate B: No. 16760566), the 21st COE program from the Ministry of Education, Culture, Sports, Science and Technology, Japan, and Osawa Scientific Studies Grants Foundation.

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Authors and Affiliations

  1. Precision and Intelligence Laboratory, Tokyo Institute of Technology, Yokohama, Kanagawa, 226-8503, Japan

    Tomonari Inamura, Yohei Takahashi (Graduate student), Hideki Hosoda & Kenji Wakashima

  2. Tokyo Institute of Technology, Japan

    Yohei Takahashi (Graduate student)

  3. Department of Materials Science & Engineering, Graduate School of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan

    Takeshi Nagase, Takayoshi Nakano & Yukichi Umakoshi

  4. Institute of Materials Science, University of Tsukuba, Tsukuba, Ibaraki, 305-8573, Japan

    Shuichi Miyazaki

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  1. Tomonari Inamura
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  2. Yohei Takahashi
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  4. Kenji Wakashima
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  7. Yukichi Umakoshi
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  8. Shuichi Miyazaki
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Inamura, T., Takahashi, Y., Hosoda, H. et al. Transformation Behavior of TiNiPt Thin Films Fabricated Using Melt Spinning Technique. MRS Online Proceedings Library 842, 144–149 (2004). https://doi.org/10.1557/PROC-842-S3.2

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  • DOI: https://doi.org/10.1557/PROC-842-S3.2

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