Dr. MADHUSUDHANA R
@atme.edu.in
Assistant Professor, Dept. of Physics
ATME College of Engineering
RESEARCH, TEACHING, or OTHER INTERESTS
Surfaces, Coatings and Films, Surfaces and Interfaces, Instrumentation, Engineering
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Ravikiran, Srikara Kundargi, S. L. Aravind, V. M. Akhil, and R. Madhusudhana
Springer Nature Singapore
Yaseen K.R. Shariff, Harish K. Choudhary, Vijay Khopkar, Ankit Yadav, R. Madhusudhana, and Balaram Sahoo
Elsevier BV
R Madhusudhana, S Lovesome Benedict, L. Krishnamurthy, R Gopalakrishne Urs, and L Vinaykumar
IOP Publishing
Abstract Nanostructured coatings are extensively employed in aerospace applications as they unveil unique and excellent properties because of their nano-sized structural behavior. This article focusses on the study of preparation of yttrium (III) nitrate hexahydrate-based nano-sized structural coating obtained by sol-gel method and the analysis of their properties. The properties that are suitable for aerospace applications such as thermal stability, oxidation resistance ability, heat resistant nature, phase stability were analyzed using Scanning Electron Microscope (SEM), Energy Dispersive X-ray Analysis (EDX) characterization techniques.
R Madhusudhana, K C Navyashree, L. Krishnamurthy, and R Gopalakrishne Urs
IOP Publishing
Abstract Aluminum alloy has gained lot of importance in Aerospace Industries and Engineering applications because of its strength, high resistance to heat, light weight and durability. In this paper we made an attempt to improve the AA5052 substrates properties by coating Zirconium Oxide (ZrO2) by Sol-Gel Method. Glass substrates were also coated with Zirconium Oxide (ZrO2) coating. The coated AA5052 and glass substrates will be annealed to check the thermal resistance for various time of thermal rig test. Micro crystalline properties and formation of ZrO2 of the coated film is evaluated for surface morphological studies by using Scanning Electron Microscope (SEM) and the elemental composition studies done by EDAX (Energy Dispersive Absorption X-ray Spectrometer).
R Madhusudhana, K L Sushma, K Chandra Sekhar, L. Krishnamurthy, R Gopalakrishne Urs, and M A Sangamesha
IOP Publishing
Abstract Anti-glare coatings (AGCs) have progressed into highly effective reflectance and glare minimizing components for several optical and opto-electrical equipment’s. The extent in research and development with the contribution of nanotechnology in opto-electronics has improved the AGCs. The present study is related to the composition of a nanostructured antiglare coating. In general, antiglare films have been widely used to deal with glare but this is not proper for an outdoor usage in glasses. Hence, improvement in performance of night-driving glasses is necessary to reduce the negative effects of headlights glare. In this paper nanostructured antiglare coating layers on glass substrate is done using Zirconium Oxide (ZrO2). The obtained coatings are highly transparent and reflective in nature. Sol–gel method is adopted for the preparation of gel, dip-coating and spin coating technique was employed to develop coatings on glass substrates. The obtained coatings were further characterized by XRD to analyze the phase crystallinity; SEM was used to determine the surface morphology of the coatings, EDX to estimate the elemental composition of the coatings and UV-vis Spectroscope was used to determine the optical properties.
B. R. Thejashwini, Vijay Khopkar, R. Madhusudhana, and B. Sahoo
Springer Science and Business Media LLC
S. Vynatheya, J.R. Naveen Kumar, R. Madhusudhana, L. Chandra Sagar, and V. Bheema Raju
Elsevier BV
Pramod Halappa, S. Thilak Raj, R. Sairani, Siddharth Joshi, R. Madhusudhana, and C. Shivakumara
Inderscience Publishers
Europium activated yttrium oxide red phosphors have gathered more attention because of their good luminescent characteristics, acceptable atmospheric stability, reduced degradation under applied voltages, and lack of hazardous constituents. In order to achieve improved luminescent properties of Y2O3:Eu3+, the synthetic methods are playing an important role. In the present study, Eu3+ (2 mol %) doped Y2O3 nanophosphors were synthesised by the facile nitrate citrate gel combustion method at relatively low temperature and shorter duration (700°C for 2 h). Further samples were characterised by powder X-ray diffraction (XRD) technique. The morphology and particle size of the phosphors were studied by scanning electron microscope (SEM), UV reflectance spectroscopy and Raman spectroscopy. The photoluminescence measurements of the Y2O3:Eu3+ particles showed red emission peaks at 610-612 nm (5D0 → 7F2). CIE chromaticity diagram and CCT calculations confirmed that these nanophosphors can act as a red component in the fabrication of white light emitting diodes (WLEDs) for display and other optical device applications.