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      https://www.ias.ac.in/article/fulltext/boms/022/01/0025-0032

    • Keywords

       

      SiC whisker; alumina; composite; wear resistant ceramic; acoustic emission; indentation fracture toughness

    • Abstract

       

      This paper is aimed at investigating the acoustic emission activities during indentation toughness tests on an alumina based wear resistant ceramic and 25 wt% silicon carbide whisker (SiCw) reinforced alumina composite. It has been shown that the emitted acoustic emission signals characterize the crack growth during loading and unloading cycles in an indentation test. The acoustic emission results indicate that in the case of the composite the amount of crack growth during unloading is higher than that of loading, while the reverse is true in case of the wear resistant ceramics. Acoustic emission activity observed in wear resistant ceramic is less than that in the case of composite. An attempt has been made to correlate the acoustic emission signals with crack growth during indentation test.

    • Author Affiliations

       

      A K Ray1 G Das1 N K Mukhopadhyay1 2 D K Bhattacharya1 E S Dwarakadasa1 3 N Parida1

      1. National Metallurgical Laboratory, Jamshedpur - 831 007, India
      2. Department of Metallurgy, Institute of Technology, Banaras Hindu University, Varanasi - 221 005, India
      3. Department of Metallurgy, Indian Institute of Science, Bangalore - 560 012, India
    • Dates

       
  • Bulletin of Materials Science | News

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