Thermally activated plastic deformation of Si single crystals at temperatures above 1173K

HANDLE Open Access
  • Suzuki, Tubasa
    Department of Materials Science and Engineering, Kyushu University Advanced Evaluation and Technology Development Department, SUMCO Corporation
  • Tanaka, Masaki
    Department of Materials, Kyushu University
  • Morikawa, Tatsuya
    Department of Materials, Kyushu University
  • Fujise, Jun
    Advanced Evaluation and Technology Development Department, SUMCO Corporation
  • Ono, Toshiaki
    Advanced Evaluation and Technology Development Department, SUMCO Corporation

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Description

The effect of high-temperature heat treatment during production on the mechanical property of Si wafer, namely yield stress, was studied through tensile tests of Si single crystals at 1123–1373 K, where stress–strain curves were obtained along the [1¯34], [011], [001], and [1¯11] directions. The critical resolved shear stress showed a remarkable temperature dependence, and it decreased with increasing test temperature. Below 1348 K, the activation enthalpy determined through strain rate jump tests showed no significant difference between crystals made by the Chokralski and the floating zone methods. This indicated that the solute oxygen does not influence the thermally activated dislocation glides. The activation enthalpy of 4.9 eV for a dislocation glide was much higher than that reported by previous studies (2.2 eV at temperatures below 1100 K), indicating that the thermal activation of dislocation glide is different from kink-pair nucleation. It was found that self-diffusion can assist the dislocation glide at temperatures above 1130 K.

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Details 詳細情報について

  • CRID
    1050862389935063936
  • NII Book ID
    AA12295836
  • ISSN
    13474065
    00214922
  • HANDLE
    2324/7169365
  • Text Lang
    en
  • Article Type
    journal article
  • Data Source
    • IRDB

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