Conference Papers

Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506

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Subject: search.filters.subject.Surface modification

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    Surface modification of steels using friction stir surfacing
    (Trans Tech Publications Ltd ttp@transtec.ch, 2012) Janakiraman, S.; Reddy, J.; Kailas, S.V.; Bhat, K.
    Friction stir surfacing is done to deposit commercial pure Al on medium carbon steel under open atmosphere conditions. Roughness of the substrate, normal load and tool rotation are the variables. Deposition is analysed with respect to continuity, width, composition and phase parameters. Good deposition is observed under a limited set of load and rotation speed. The deposit contains a mixture of steel and aluminium particles. © (2012) Trans Tech Publications.
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    On line monitoring of quality of friction surfacing
    (Trans Tech Publications, 2014) Janakiraman, S.; Bhat, K.U.
    Quality of deposition during friction surfacing depends on a number of parameters. With instrumentation many of these parameters can be observed in real time. Monitoring of these parameters allows one to incorporate necessary corrections, whenever, that parameters goes out of the safe domain. Present investigation aims at the potential of monitoring some of these parameters online and the quality of the deposition. It is observed that spindle speed and torque are not effective parameters whereas monitoring material consumption or height of the consumable friction tool is very much useful in monitoring the quality of the deposition. © (2014) Trans Tech Publications, Switzerland.
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    Sonochemical synthesis of cetyl trimethylammonium bromide modified halloysite nanotubes-polystyrene nanocomposites by solution casting method
    (Chemical Publishing Co., 2017) Buruga, B.; Kalathi, T.K.
    This paper reports the surface modification of halloysite nanotubes (HNTs) using cetyl trimethylammonium bromide (CTAB) and propitious incorporation of CTAB-HNTs into polystyrene matrix by ultrasound-assisted solution casting method. The effect of surface modification and sonication on the structure, morphology and thermal behaviour of the modified halloysite nanotubes and synthesized nanocomposites was also investigated. X-ray diffraction data stipulated increase in d-spacing on surface modification and revealed complete exfoliation as a result of sonication. Scanning electron microscopy portrayed uniform distribution of clay in the polymer matrix due to combined effect of surface modification as well as sonication. Fourier transform and infrared results manifested halloysite nanotubes, cetyl trimethylammonium bromides and polystyrene major peaks in the synthesized nanocomposites confirming intercalation of cetyl trimethylammonium bromide in halloysite nanotubes interlayers and encapsulation of CTAB-HNT into the polymer, DSC analysis displayed enhancement in glass transition temperature (Tg) indicating increase in thermal stability, hence these can improved properties with potential applications. © 2017, Chemical Publishing Co. All rights reserved.