• Indentation studies of alkali halides at elevated temperatures

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    • Keywords


      Mechanical properties; hardness; indentation; alkali halides

    • Abstract


      The hardness of NaCl and KCl crystals has been estimated from the lengths of dislocation rosette formed around indentation at various temperatures up to 400°C. The hardness decreases with increasing temperature. This is due to the softening of the crystals at elevated temperatures which results in the easy movement of dislocations. The results are discussed using a few available relations which connect hardness to temperature. Arms of indentation dislocation rosette are well defined up to 300°C but around 400°C the rosette pattern is spread over a circular region. A possible mechanism is discussed.

    • Author Affiliations


      K Kishan Rao1 D B Sirdeshmukh1

      1. Department of Physics, Kakatiya University, Warangal - 506009, India
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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