Conference Papers

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    Electrical Characterization of Hybrid Hetero Interface using n-ZnO and p-CuPc
    (Elsevier Ltd, 2015) Raveendra Kiran, M.R.; Ulla, H.; Fernandes, J.M.; Satyanarayan, M.N.; Umesh, G.
    In the present work we report the fabrication, current density-voltage (J-V) characteristics, capacitance-voltage characteristics and impedance measurements of the n-ZnO nanoparticles/ p-CuPc hybrid junction. ZnO nanoparticles were synthesized by sol-gel method. The J-V characteristics clearly show the diode like behaviour. The junction behaviour has been investigated using surface topography (AFM), capacitance and electrical impedance studies. © 2015 Elsevier Ltd.
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    Effect of retrogression and re-ageing heat treatment on microstructure and microhardness of aluminium 7010 alloy
    (EDP Sciences edps@edpsciences.com, 2018) Nandana, M.S.; Udaya Bhat, K.; Manjunatha, C.M.
    Aluminium alloy 7010 is subjected to retrogression and re-ageing (RRA) heat treatment to study the influence of microstructural changes on hardness. Retrogression is performed at 190 °C for different time intervals ranging from 10 to 60 minutes. Optimum time for retrogression treatment is estimated based on the retrogression time that result with equivalent mechanical properties as that of peak aged (T6) condition. Retrogression performed for 30 minutes resulted with micro hardness of 203 HV, which is equivalent to that obtained by following T6 treatment. Microstructural characterization done with the help of transmission electron microscope (TEM) indicates RRA treatment results with the coarsened and discontinuous precipitates along the grain boundary which is similar to over aged (T7) condition, where as fine and densely populated precipitates in the matrix similar to T6 condition. Coarse and discontinuous grain boundary precipitates (GBP's) improves resistance to stress corrosion cracking. Fine and dense precipitates in the matrix ensures hardness equivalent to that of T6. © The Authors, published by EDP Sciences, 2018.
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    Optimization of Process Parameters for the Friction Surface Coating of Al 6061 on Al 2024 for Wear Applications
    (American Institute of Physics Inc., 2022) Sudhish, R.; Udaya Bhat, K.
    The present work investigates the role of process parameters on the wear property of friction surfaced Al 6061 coating on Al 2024 substrate material. For this study, after many optimization experiments, four samples with different friction surface forces were prepared. Several mechanical and metallographic characterizations were conducted on the samples that including hardness analysis, metallographic analysis using optical microscopy, scanning electron microscopy and transmission electron microscopy, elemental analysis using energy dispersive spectroscopy, and phase analysis using X-ray diffraction spectroscopy technique. From the results, it is found that the hardness, as well as wear property, has been improved with the increase of friction surfacing force. © 2022 American Institute of Physics Inc.. All rights reserved.