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    • Indentation studies on alkaline earth fluoride crystals at elevated temperatures

      K Kishan Rao D B Sirdeshmukh

      Volume 34 Issue 2 February 1990 pp 151-156

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/034/02/0151-0156

    • Keywords

       

      Hardness; indentation; slip; fluorite type crystals

    • Abstract

       

      Indentations have been made on the (111) planes of CaF2, SrF2 and BaF2 at various temperatures up to 700°C. By etching the crystals, the indentation dislocation rosettes (IDRs) have been recorded and the relative hardness is estimated from the dimensions of the IDRs. The hardness of all these crystals falls with temperature according to the equationH=A exp(−BT). Dramatic changes are observed in the shape of the IDR at elevated temperatures indicating activation of new slip systems.

    • Author Affiliations

       

      K Kishan Rao1 D B Sirdeshmukh1

      1. Department of Physics, Kakatiya University, Warangal - 506 009, India

    • Dates

       
      Published
      February 1990
      Manuscript received
      12 May 1989
      Manuscript revised
      11 October 1989

  • Pramana – Journal of Physics | News

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