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 reviewed the recent developments on lead-free piezo materials emphasizing on their preparation, structure-property correlation, etc., and concluded that some lead free compositions show stable piezoelectric responses even though they do not match the overall performance of PZT.
Abstract: Lead zirconate titanate (PZT) based piezoelectric materials are well known for their excellent piezoelectric properties. However, considering the toxicity of lead and its compounds, there is a general awareness for the development of environmental friendly lead-free materials as evidenced from the legislation passed by the European Union in this effect. Several classes of materials are now being considered as potentially attractive alternatives to PZTs for specific applications. In this paper, attempts have been made to review the recent developments on lead-free piezo materials emphasizing on their preparation, structure–property correlation, etc. In this context, perovskite systems such as bismuth sodium titanate, alkali niobates (ANbO3), etc. and non-perovskites such as bismuth layer-structured ferroelectrics are reviewed in detail. From the above study, it is concluded that some lead-free compositions show stable piezoelectric responses even though they do not match the overall performance of PZT. This has been the stimulant for growing research on this subject. This topic is of current interest to the researchers worldwide as evidenced from the large number of research publications. This has motivated us to come out with a review article with a view that it would give further impetus to the researchers already working in this area and also draw the attention of the others.
865 citations
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TL;DR: In this paper, the recent developments and trends in combustion science towards the synthesis of nanomaterials are discussed, and different modifications made to conventional combustion approaches for preparation of nano-materials are critically analyzed.
Abstract: The recent developments and trends in combustion science towards the synthesis of nanomaterials are discussed. Different modifications made to conventional combustion approaches for preparation of nanomaterials are critically analyzed. Special attention is paid to various applications of combustion synthesized nanosized products.
842 citations
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TL;DR: Combustion synthesis has emerged as a facile and economically viable technique for the preparation of advanced ceramics, catalysts and nanomaterials as discussed by the authors, and recent innovations in the combustion and processing parameters have resulted in a better understanding of combustion phenomena and control of microstructure and property of the products.
Abstract: Combustion synthesis has emerged as a facile and economically viable technique for the preparation of advanced ceramics, catalysts and nanomaterials. Recent innovations in the combustion and processing parameters have resulted in a better understanding of combustion phenomena and control of microstructure and property of the products.
767 citations
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TL;DR: In this paper, the state-of-the-art physical vapor deposited solar selective coatings used for solar thermal applications with an emphasis on sputter deposited coatings for high-temperature applications.
543 citations
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01 Jan 1994TL;DR: In this article, a flux splitting scheme is proposed for the general nonequilibrium flow equations with an aim at removing numerical dissipation of Van-Leer-type flux-vector splittings on a contact discontinuity.
Abstract: A flux splitting scheme is proposed for the general nonequilibrium flow equations with an aim at removing numerical dissipation of Van-Leer-type flux-vector splittings on a contact discontinuity. The scheme obtained is also recognized as an improved Advection Upwind Splitting Method (AUSM) where a slight numerical overshoot immediately behind the shock is eliminated. The proposed scheme has favorable properties: high-resolution for contact discontinuities; conservation of enthalpy for steady flows; numerical efficiency; applicability to chemically reacting flows. In fact, for a single contact discontinuity, even if it is moving, this scheme gives the numerical flux of the exact solution of the Riemann problem. Various numerical experiments including that of a thermo-chemical nonequilibrium flow were performed, which indicate no oscillation and robustness of the scheme for shock/expansion waves. A cure for carbuncle phenomenon is discussed as well.
480 citations
Authors
Showing all 1850 results
Name | H-index | Papers | Citations |
---|---|---|---|
Vps Naidu | 13 | 82 | 1051 |
A. de Boer | 13 | 91 | 597 |
Abanti Nag | 13 | 32 | 995 |
Mamoru Takahashi | 13 | 32 | 489 |
R. K. Saket | 13 | 90 | 690 |
Meenu Srivastava | 13 | 36 | 777 |
Palanisamy Senthilkumar | 13 | 56 | 1088 |
Takashi Kida | 13 | 106 | 617 |
C. M. Manjunatha | 13 | 52 | 679 |
Arvind Kumar | 13 | 43 | 416 |
R. M. V. G. K. Rao | 13 | 27 | 387 |
Venkataramana Bonu | 12 | 20 | 552 |
Tetsuo Hiraiwa | 12 | 43 | 368 |
P. Kondaiah | 12 | 33 | 333 |
Henry Dol | 12 | 36 | 598 |