• R V Nandedkar

      Articles written in Bulletin of Materials Science

    • High voltage electron microscope irradiation and observations in metallic glasses

      R V Nandedkar A K Tyagi

      More Details Abstract Fulltext PDF

      High voltage electron microscope (hvem) has been extensively used to produce radiation damage and to study the characteristics of defects so produced in crystalline solids. To understand the defect production in metallic glasses and to evaluate the influence of such defects on physical properties like crystallisation temperature etc., high voltage microscopy and subsequentin situ heating and observation has been extremely useful technique. This paper gives a qualitative overview of such work performed in metallic glasses. In particular results obtained on a nickel based metallic glass using ahvem and an electron accelerator are presented. The advantages and limitations ofhvem irradiation are highlighted.

    • Electron beam deposition system for X-ray multilayer mirrors

      G S Lodha R V Nandedkar Adu Varma

      More Details Abstract Fulltext PDF

      We have developed a multi source electron beam evaporation system toprepare high quality X-ray multilayer mirrors. The system has three electron guns mounted in an ultra high vacuum chamber. The deposition system is evacuated by a turbo molecular pump and two sputter ion pumps. A movable masking system is mounted to deposit several kinds of multilayers. First results on niobium-carbon X-ray multilayers are presented.

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      Posted on July 25, 2019

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