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Deformation of doped NaCl crystals during uniaxial compression at temperatures of 4.2–293 K

  • Defects. Dislocations. Physics of Strength
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Abstract

The impurity weakening of crystalline NaCl:Mg and NaCl:Mn associated with purification of the matrix in a melt is demonstrated. This effect is manifested in a consistent change in the yield strength and mobility of dislocations. Its unusual temperature dependence is determined: in a number of cases weakening becomes greater as the temperature is lowered within the interval 293–4.2 K. A deviation in the elastic region of the stress-strain curves is observed to increase as the temperature is lowered. Plasticizing of crystalline NaCl is established: when the deformation temperature is lowered from 293 to 77 and 4.2 K the rate of rise in the yield strength of Cd2+ and Sr2+ doped samples is lower than that of undoped samples. An explanation for this fact is proposed.

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Authors and Affiliations

  1. Institute of Applied Physics, Academy of Sciences of Moldavia, 277028, Kishinev, Moldavia

    Yu. S. Boyarskaya & R. P. Zhitaru

Authors
  1. Yu. S. Boyarskaya
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  2. R. P. Zhitaru
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Fiz. Tverd. Tela (St. Petersburg) 39, 313–317 (February 1997)

Deceased.

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Boyarskaya, Y.S., Zhitaru, R.P. Deformation of doped NaCl crystals during uniaxial compression at temperatures of 4.2–293 K. Phys. Solid State 39, 274–277 (1997). https://doi.org/10.1134/1.1129797

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  • DOI: https://doi.org/10.1134/1.1129797

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