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    • Cracking phenomena in lithium-di-silicate glass ceramics

      Rajat Banerjee

      Volume 24 Issue 2 April 2001 pp 157-160

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/024/02/0157-0160

    • Keywords

       

      Lithium-di-silicate; crystals; angle of rotation; crack driving force.

    • Abstract

       

      Lithium-di-silicate glass ceramic (Li2O, SiO2) with uniformly oriented crystals was placed on a Vickers indentation with extrusion axis horizontally parallel to the base axis. The material was rotated through 0°– 90° and at each angle a 20 N load was applied to ascertain the crack path. It was observed that the crack length decreases and the crack deviates from its original path with increasing angle. The deviation of the crack was correlated with the component of the crack driving force and the theoretical strength of the aligned crystals at different angles.

    • Author Affiliations

       

      Rajat Banerjee1

      1. Central Glass and Ceramic Research Institute, Kolkata 700 032, India

    • Dates

       
      Published
      April 2001

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