• S P Sengupta

      Articles written in Bulletin of Materials Science

    • Microhardness studies in gel-grown ADP and KDP single crystals

      S Sengupta S P Sengupta

      More Details Abstract Fulltext PDF

      Microhardness studies were carried out on (100) faces of gel-grown ADP and KDP single crystals. Slip lines were observed on (100) face of ADP crystal at the corners of the impressions. Microcracks around the indentation were found on (100) face of KDP crystal from 10g load which spread out as the load increased. Vickers hardness numberHv decreased with increase in load. ΔHv at 50g load for solution-grown crystals and gel-grown crystals (present case) was determined. Work hardening indexn for both ADP and KDP crystals was less than 2 showing soft-material characteristics. Using Wooster’s empirical relation, values of C11 from hardness were calculated and found to be close to the reported ones.

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