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首页> 外文会议>Diffusion in materials >Ti and Ni Grain Boundary Diffusion in B2 NiTi Compound
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Ti and Ni Grain Boundary Diffusion in B2 NiTi Compound

机译：B2 NiTi化合物中Ti和Ni的晶界扩散

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摘要

The radiotracer technique was used to measure the grain boundary diffusion of ~(44)Ti and ~(63)Ni in slightly Ni-rich polycrystalline NiTi compound in the temperature range of 673 - 923 K. The temperature dependence of the grain boundary triple product P (P = sδD_(gb), s is the segregation coefficient, 8 is the grain boundary width, and D_(gb) is the grain boundary diffusion coefficient) for Ti and Ni was determined. The triple products of both Ti and Ni grain boundary diffusion in NiTi reveal a unique behavior with significant deviations from an Arrhenius-type dependence. Probable evolution of the grain boundary structure with temperature was used to interpret this phenomenon.
机译：放射性示踪技术用于在673-923 K的温度范围内测量微富镍的多晶NiTi化合物中〜（44）Ti和〜（63）Ni的晶界扩散。晶界三元产物的温度依赖性确定了Ti和Ni的P（P ＝sδD_（gb），s是偏析系数，8是晶界宽度，D_（gb）是晶界扩散系数）。 NiTi中Ti和Ni晶界扩散的三元产物显示出独特的行为，与Arrhenius型依赖关系存在显着偏差。晶界结构随温度的可能演变被用来解释这一现象。

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  • 来源
    《Diffusion in materials 》|2014年|137-141|共5页
  • 会议地点 Munster(DE)
  • 作者

    Dandan Liu; Jochen Fiebig; Martin Peterlechner; Simon Trubel; Matthias Wegner; Yong Du; Zhanpeng Jin; Gerhard Wilde; Sergiy Divinski;

  • 作者单位

    Institute of Materials Physics, University of Muenster, Wilhelm-Klemm-Str. 10, D-48149 Muenster, Germany,School of Materials Science and Engineering, Central South University, 410083 Changsha, Hunan, China,State Key Lab of Powder Metallurgy, Central South University, 410083 Changsha, Hunan, China;

    Institute of Materials Physics, University of Muenster, Wilhelm-Klemm-Str. 10, D-48149 Muenster, Germany;

    Institute of Materials Physics, University of Muenster, Wilhelm-Klemm-Str. 10, D-48149 Muenster, Germany;

    Institute of Materials Physics, University of Muenster, Wilhelm-Klemm-Str. 10, D-48149 Muenster, Germany;

    Institute of Materials Physics, University of Muenster, Wilhelm-Klemm-Str. 10, D-48149 Muenster, Germany;

    State Key Lab of Powder Metallurgy, Central South University, 410083 Changsha, Hunan, China;

    School of Materials Science and Engineering, Central South University, 410083 Changsha, Hunan, China;

    Institute of Materials Physics, University of Muenster, Wilhelm-Klemm-Str. 10, D-48149 Muenster, Germany;

    Institute of Materials Physics, University of Muenster, Wilhelm-Klemm-Str. 10, D-48149 Muenster, Germany;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    diffusion; grain boundary; NiTi; B2 alloy; shape memory alloy;

    机译：扩散;晶界;镍钛; B2合金；形状记忆合金;

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