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 article, the authors present a review of the developments that have taken place on the use of passive techniques or devices for axisymmetric base and net afterbody drag reduction in the absence of jet flow at the base.
100 citations
TL;DR: In this article, large-area PVDF thin films have been prepared and characterized for quasi-static and high frequency dynamic strain sensing applications and the linear strainvoltage relationship obtained is promising.
Abstract: Large-area PVDF thin films have been prepared and characterized for quasi-static and high frequency dynamic strain sensing applications. These films are prepared using hot press method and the piezoelectric phase (beta-phase) has been achieved by thermo-mechanical treatment and poling under DC field. The fabricated films have been characterized for quasi-static strain sensing and the linear strain-voltage relationship obtained is promising. In order to evaluate the ultrasonic sensing properties, a PZT wafer has been used to launch Lamb waves in a metal beam on which the PVDF film sensor is bonded at a distance. The voltage signals obtained from the PVDF films have been compared with another PZT wafer sensor placed on the opposite surface of the beam as a reference signal. Due to higher stiffness and higher thickness of the PZT wafer sensors, certain resonance patterns significantly degrade the sensor sensitivity curves. Whereas, the present results show that the large-area PVDF sensors can be superior with the signal amplitude comparable to that of PZT sensors and with no resonance-induced effect, which is due to low mechanical impedance, smaller thickness and larger area of the PVDF film. Moreover, the developed PVDF sensors are able to capture both A(0) and S-0 modes of Lamb wave, whereas the PZT sensors captures only A(0) mode in the same scale of voltage output. This shows promises in using large-area PVDF films with various surface patterns on structures for distributed sensing and structural health monitoring under quasi-static, vibration and ultrasonic situations. (C) 2010 Elsevier B.V. All rights reserved.
99 citations
TL;DR: In this article, a tandem absorber for solar spectrum reflectometer and emissometer, cross-sectional transmission electron microscopy (XTEM), selected area diffraction (SAD), X-ray photoelectron spectroscopy (XPS) and phase-modulated ellipsometry techniques was developed.
98 citations
TL;DR: In this paper, a silica (SiO2) sol, prepared using sol-gel process, was deposited on cleaned glass substrates by dip coating method and subjected to heat treatment at 400 °C The thickness and porosity of the coating were optimized to achieve high transmittance.
97 citations
TL;DR: In this paper, super-hydrophobic sol-gel nanocomposite coatings have been fabricated by incorporating silica nanoparticles with different particle sizes separately in an acid-catalyzed sol of methyltriethoxysilane (MTEOS).
96 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 |