Institution
National Aerospace Laboratories
Facility•Bengaluru, India•
About: National Aerospace Laboratories is a facility organization based out in Bengaluru, India. It is known for research contribution in the topics: Coating & Corrosion. The organization has 1838 authors who have published 2349 publications receiving 36888 citations.
Topics: Coating, Corrosion, Mach number, Sputter deposition, Aerodynamics
Papers published on a yearly basis
Papers
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TL;DR: In this paper, the authors used X-ray diffraction (XRD), nanoindentation and atomic force microscopy (AFM) techniques to characterize the hardness of the multilayer coatings.
Abstract: Cu/Ni multilayer coatings prepared by RF/DC magnetron sputtering process were characterized using x-ray diffraction (XRD), nanoindentation and atomic force microscopy (AFM) techniques. Films deposited under certain deposition conditions showed the appearance of satellite reflections around the principal reflections in the XRD data, indicating the formation of superlattice structure. Nanohardness measurements were performed on the films prepared under different deposition conditions, e.g. modulation wavelength (x39B;), copper to nickel thickness ratio (tCu/tNi) and substrate temperature (Ts). Nanohardness data revealed that the hardness was enhanced by a factor of 2.5 times that of the rule-of-mixtures value. This enhancement in hardness occurred over a limited range of x39B;. The results indicated that the hardness also depends on the copper to nickel thickness ratio and for tCu/tNi0.30 the films exhibited a maximum hardness. The hardness increased almost linearly with substrate temperature up to 200 xB0;C and got saturated at 250 xB0;C. No considerable change in the hardness was observed after vacuum annealing of the coatings. Imaging of the residual imprints by AFM revealed pile-up formation after indentation. The extent of pile-up, a measure of plastic flow of the material, was dependent on the preparation conditions of the multilayer coatings.
83 citations
TL;DR: Gd(2)O(3) nanoparticles have been synthesized by the low temperature solution combustion method using citric acid, urea, glycine and oxalyl dihydrazide as fuels in a short time and the structural and luminescence properties have been carried out using powder X-ray diffraction, transmission electron microscopy, and Fourier transform infrared spectroscopy techniques.
82 citations
TL;DR: In this paper, superhydrophobic surfaces based on ZnO-PDMS nanocomposite coatings are demonstrated by a simple, facilitile, time-saving, wet chemical route.
82 citations
TL;DR: Spectrally selective AlxOy/Al/AlXOy multilayer absorber coatings were deposited on copper (Cu) and molybdenum (Mo) substrates using a pulsed sputtering system as mentioned in this paper.
81 citations
TL;DR: In this paper, a new HfMoN(H)/HfMoNs(L)/HmN/Al 2 O 3 tandem absorber was designed and developed for high temperature solar thermal applications.
80 citations
Authors
Showing all 1850 results
| Name | H-index | Papers | Citations |
|---|---|---|---|
| Harish C. Barshilia | 46 | 236 | 6825 |
| K.S. Rajam | 42 | 83 | 4765 |
| Kozo Fujii | 39 | 411 | 5845 |
| Parthasarathi Bera | 39 | 136 | 5329 |
| R.P.S. Chakradhar | 36 | 166 | 4423 |
| T. N. Guru Row | 36 | 309 | 5186 |
| Takashi Ishikawa | 36 | 154 | 5019 |
| Henk A. P. Blom | 34 | 168 | 5992 |
| S. Ranganathan | 33 | 211 | 5660 |
| S.T. Aruna | 33 | 101 | 4954 |
| Arun M. Umarji | 33 | 207 | 3582 |
| Vinod K. Gaur | 33 | 92 | 4003 |
| Keisuke Asai | 31 | 350 | 3914 |
| K. J. Vinoy | 30 | 240 | 3423 |
| Gangan Prathap | 30 | 241 | 3466 |