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Showing 3 results for Prasanna

B.m. Viswanatha, M. Prasanna Kumar, S. Basavarajappa, T.s. Kiran,
Volume 14, Issue 2 (June 2017)
Abstract

The effects of applied load, sliding speed and sliding distance on the dry sliding wear behavior of aged Al-SiCp-Gr composites were investigated. The specimen were fabricated by stir-casting technique. The pin-on-disc wear testing machine was used to investigate the wear rate by design of experiments based on L27 using Taguchi technique. Sliding distance was the most important variable that influenced the wear rate followed by sliding speed and applied load. The worn out surfaces were analyzed by SEM and EDS to study the subsurface mechanism of wear. The addition of reinforcements showed improved tribological behavior of the composite than base alloy.


Puneeth Puneeth, Gangarekaluve J. Naveen, Vishwanath Koti, Nitrahalli D. Prasanna, Litton Bhandari, Javaregowda Satheesh, Parthasarathy Sampathkumara,
Volume 19, Issue 1 (March 2022)
Abstract

Hybrid composite finds wide application in various fields. In this present study, the hybrid composites are developed using stir casting technique as per Taguchi’s L9 orthogonal array. Hybrid composites were fabricated using Aluminium Al6082 as the base material and reinforced with the combinations of reinforcements Al2SiO5 and B4C at three levels (4%, 8% and 12%).The developed composites were analyzed for micro structural  investigations and mechanical tests were done as per ASTM standards. The micro structural analysis was done using optical Microscope and Scanning electron microscope while composition studies were done using X-ray diffraction and EDAX. Mechanical test like tensile, impact and flexural were conducted and their damage assessment was done using Scanning electron microscope. The fatigue characteristics like high cycle fatigue and fatigue crack propagation was studied both experimentally and numerically. The experimental data and numerical modeling analysis data obtained for the hybrid composite system, agree with each other.           
Umadevi Prasanna, Vijaya Kumar Kambila, Krishna Jyothi Nadella,
Volume 21, Issue 4 (December 2024)
Abstract

The composite solid polymer electrolyte films were prepared by doping nano-sized Fe2O3 particles on PVB (Polyvinyl Butyral) complexed with NaNO3 salt by solution casting technique. FTIR, XRD, and SEM methods characterized these electrolyte films. The Fourier Transform Infrared Spectroscopy and X-ray diffraction methods reveal the structural and complexation changes occurring in the electrolytes. The surface morphology of the electrolyte film was examined using the SEM (Scanning Electron Microscope) technique. The PVB+NaNO3+Fe2O3(70:30:3%) electrolyte shows a moderate ionic conductivity of 2.51×10−5 S cm−1 at ambient temperature (303 K). AC impedance spectroscopic analysis evaluates the ionic conductivity of the produced polymer electrolyte. Wagner's polarisation technique was applied to study the charge transport characteristics in the electrolyte films. The investigation revealed that ions constituted the majority of the transport carriers. An Open Circuit Voltage (OCV) of 2.0V and a Short Circuit Current (SCC) of 0.8 mA were found in the discharge characteristics data for the cell constructed with the polymer electrolyte sample.
 

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