scholarly journals A novel processing technique for fabrication of flexible YBa2Cu3O7−xwire

1989 ◽  
Vol 66 (9) ◽  
pp. 4532-4534 ◽  
Author(s):  
Shyam K. Samanta ◽  
S. Samajdar ◽  
W. Durrant ◽  
M. Gupta
Keyword(s):  
Processing Technique ◽  
Novel Processing

Electrochemical Testing and Structural Characterisation of Nickel Based Catalytic Coatings Produced by Direct Spraying

1998 ◽  
Vol 549 ◽  
Author(s):  
S.M.A. Sillitto ◽  
N.J.E. Adkins ◽  
D.R. Hodgson ◽  
E. Paul ◽  
R.M. Ormerod
Keyword(s):  
Raney Nickel ◽  
Phase Distribution ◽  
Pilot Scale ◽  
Processing Technique ◽  
Phase Identification ◽  
X Ray Diffraction ◽  
Structural Characterisation ◽  
Beneficial Effects ◽  
Electrochemical Testing ◽  
Novel Processing

AbstractIn this paper a novel processing technique has been used to produce a range of low overpotential nickel based electrocatalytic coatings for use in the Chlor-alkali industry. These coatings include pure nickel as well as Raney nickel alloys, with particular focus upon the beneficial effects of molybdenum additions to Raney nickel.Structural characterisation of all coatings has been carried out using X-ray diffraction for quantitative phase identification, backed up by optical and electron microscopy for analysis of phase distribution. Measurement of the coatings' electrochemical properties has been performed in fully functioning micro-pilot scale electrolysis cells.

scholarly journals Current understanding and applications of the cold sintering process

2019 ◽  
Vol 13 (4) ◽  
pp. 654-664 ◽  
Author(s):  
Tong Yu ◽  
Jiang Cheng ◽  
Lu Li ◽  
Benshuang Sun ◽  
Xujin Bao ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Sintering Temperature ◽  
Applied Pressure ◽  
Processing Technique ◽  
Rechargeable Batteries ◽  
Processing Conditions ◽  
Ceramic Processing ◽  
Sintering Process ◽  
Novel Processing ◽  
Processing Techniques

Abstract In traditional ceramic processing techniques, high sintering temperature is necessary to achieve fully dense microstructures. But it can cause various problems including warpage, overfiring, element evaporation, and polymorphic transformation. To overcome these drawbacks, a novel processing technique called “cold sintering process (CSP)” has been explored by Randall et al. CSP enables densification of ceramics at ultra-low temperature (⩽300°C) with the assistance of transient aqueous solution and applied pressure. In CSP, the processing conditions including aqueous solution, pressure, temperature, and sintering duration play critical roles in the densification and properties of ceramics, which will be reviewed. The review will also include the applications of CSP in solid-state rechargeable batteries. Finally, the perspectives about CSP is proposed.

scholarly journals Signal Processing for Parametric Acoustic Sources Applied to Underwater Communication

Sensors ◽  
2020 ◽  
Vol 20 (20) ◽  
pp. 5878
Author(s):  
María Campo-Valera ◽  
Ivan Felis-Enguix ◽  
Isidro Villó-Pérez
Keyword(s):  
Cross Correlation ◽  
Sound Propagation ◽  
Signal To Noise Ratio ◽  
Processing Technique ◽  
Underwater Communication ◽  
Carrier Wave ◽  
Acoustic Communications ◽  
Correlation Processing ◽  
Novel Processing ◽  
Special Relevance

For years, in the field of underwater acoustics, a line of research with special relevance for applications of environmental monitoring and maritime security has been developed that explores the possibilities of non-linear phenomena of sound propagation, especially referring to the so-called parametric effect or self-modulation. This article shows the results of using a new modulation technique based on sine-sweep signals, compared to classical modulations (FSK and PSK). For each of these modulations, a series of 16-bit strings of information with different frequencies and durations have been performed, with the same 200 kHz carrier wave. All of them have been tested in the Hydroacoustic Laboratory of the CTN and, through the application of cross-correlation processing, the limitations and improvements of this novel processing technique have been evaluated. This allows reaching better limits in discrimination of bits and signal-to-noise ratio used in underwater parametric acoustic communications.

scholarly journals Spatial Enhancement of AWiFS along Wider Swath using NSCT

2018 ◽  
Vol 7 (3.12) ◽  
pp. 474
Author(s):  
K S. R. Radhika ◽  
C V. Rao ◽  
V Kamakshi Prasad
Keyword(s):  
Temporal Resolution ◽  
Accuracy Assessment ◽  
Super Resolution ◽  
Computation Time ◽  
Processing Technique ◽  
Sensor Data ◽  
Liss Iii ◽  
Novel Processing ◽  
Single Image Super Resolution ◽  
Processing Techniques

Image acquisition in a wider swath, cannot assess the best spatial resolution (SR) and temporal resolution (TR) simultaneously, due to inherent limitations of space borne sensors. But any of the information extraction from remote sensed (RS) images demands the above characteristics. As this is not possible onboard, suitable ground processing techniques need to be evolved to realise the requirements through advanced image processing techniques. The proposed work deals with processing of two onboard sensor data viz., Resourcesat-1 (RS1): LISS-III, which has medium swath combined with AWiFS, which has wider swath data to provide high spatial and temporal resolution at the same instant. LISS-III at 23m and 24 days, AWiFS at 56m and 5 days spatial and temporal revisits acquire the data at different swaths. In the process of acquisition at the same time, the 140km swath of LISS-III coincides at the exact centre line 740km swath of AWiFS. If the non-overlapping area of AWiFS has same features of earth’s surface as of LISS-III overlapping area, it then provides a way to increase the SR of AWiFS to SR of LISS-III in the same non-overlapping area. Using this knowledge, a novel processing technique Fast One Pair Learning and Prediction (FOPLP) is developed in which time is optimized against the existing methods. FOPLP improves the SR of LISS-III in non-overlapping area using technique Single Image Super Resolution (SISR) with Non Sub sampled Contourlet Transforms (NSCT) method and is applied on different sets of images. The proposed technique resulting into an image having TR of 5 days, 740km swath at SR of 23m. Results have shown the strength of the proposed method in terms of computation time and prediction accuracy assessment.  

A Novel Processing Technique for Tow Fiber Reinforced Metal Matrix Composites with Tailored Interfaces

1996 ◽  
Vol 11 (2) ◽  
pp. 245-262 ◽  
Author(s):  
Sumit Guha ◽  
Chris Stoessel ◽  
James Withers ◽  
Raouf Loutfy ◽  
Susan Draper
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Processing Technique ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Novel Processing

MBE FABRICATION OF GaAs/AlGaAs LOW-DIMENSIONAL STRUCTURES ON IN SITU PATTERNED GaAs SUBSTRATES

1996 ◽  
Vol 10 (27) ◽  
pp. 3637-3648
Author(s):  
TOMONORI ISHIKAWA ◽  
MÁXIMO LÓPEZ
Keyword(s):  
High Vacuum ◽  
Processing Technique ◽  
Ultra High Vacuum ◽  
Surface Oxide Layer ◽  
Gaas Substrates ◽  
Mask Material ◽  
Gaas Buffer Layer ◽  
Novel Processing ◽  
Low Dimensional

We have developed a novel processing technique, conducted entirely under an ultra-high vacuum environment, to pattern GaAs substrates on which GaAs/AlGaAs low-dimensional structures are subsequently regrown. In this technique, called in situ electron-beam (EB) lithography, a thin surface-oxide-layer is selectively formed by EB-stimulated oxidation under a controlled oxygen atmosphere. This is used as a mask material to define patterned mesas by Cl 2 gas etching. Subsequently, the initial mesa size is reduced by the regrowth of a GaAs buffer layer; finally, low-dimensional structures, such as quantum-wire or -box structures, are formed on the top of the mesas by the growth of a quantum well. This in situ technique is advantageous for the fabrication of arbitrarily designed low-dimensional structures with high quality.

Structural Instability of the Ceramic Coating in a Metal-Ceramic Composite Induced Through Control of Chemistry of the Bonding Atmosphere

1992 ◽  
Vol 280 ◽  
Author(s):  
Abhijit Ray
Keyword(s):  
Amorphous Phase ◽  
Bonding Temperature ◽  
Structural Instability ◽  
Processing Technique ◽  
High Concentration ◽  
Ceramic Phase ◽  
Enhanced Diffusion ◽  
Transmission Electron ◽  
Metal Ceramic ◽  
Novel Processing

ABSTRACTA novel processing technique has been developed to coat Al2O3 on Nb in an argon atmosphere with very low O2 content. It has been proposed1 that the low O2 content helped to increase the defect concentration in the ceramic phase resulting in an enhanced diffusion of Nb into Al2O3 at the metal-ceramic interface at a relatively low bonding temperature. A mathematical model has been developed1 to understand the effect of purified bonding atmosphere on interfacial diffusion. While diffraction studies in the transmission electron microscope revealed1 extensive amorphization at the metal-ceramic interface, EDX analysis showed1 that the interfacial amorphous phase has a very high concentration of O. Additionally, this phase is found to contain Al and Nb. The interfacial phase is formed due to the diffusion of Nb into the ceramic phase. The paradoxical phenomenon of O enrichment of the interfacial amorphous phase in a low O2 containing bonding atmosphere is due to the loss of gaseous oxides of Al from this phase. These oxides have relatively less proportion of O compared to Al2O3. Continuous loss of such oxides from the amorphous phase to the gaseous phase will, therefore, result in an O to Al ratio (in the amorphous phase) far exceeding that in Al2O3 (3:2).

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