Experimental investigations of sol-gel process parameters for wear reduction on thermal barrier coated AA2024 aluminum alloys with the use of Taguchi-based optimization

Sadhana ◽  
2020 ◽  
Vol 45 (1) ◽  
Author(s):  
Dipak Kumar ◽  
K N Pandey
Keyword(s):  
Aluminum Alloys ◽  
Process Parameters ◽  
Sol Gel ◽  
Experimental Investigations ◽  
Thermal Barrier ◽  
Sol Gel Process ◽  
Wear Reduction

Halogenation of ORMOSIL: A Promising Rout for Tailoring Optical Absorptions

2003 ◽  
Vol 771 ◽  
Author(s):  
Amir Fardad ◽  
Wei Liang ◽  
Yadong Zhang ◽  
Bryson Case ◽  
Shibin Jiang ◽  
...  
Keyword(s):  
Process Parameters ◽  
Sol Gel ◽  
Fiber Amplifiers ◽  
Grignard Reaction ◽  
Coupling Loss ◽  
Beam Splitters ◽  
Silicon Technology ◽  
Sol Gel Process ◽  
Propagation Losses ◽  
Signal Intensities

AbstractFluorinated and photo-imageable precursors are synthesized through a Barbier-Grignard reaction for 1550-nm window. The precursors are used for the sol-gel process of integrated optic components for silica-on-silicon technology. Material compositions and process parameters are optimized to achieve internal absorptions >0.1 dB/cm and propagation losses of about 0.5 dB/cm at 1550 nm. Compact 1×16 Beam splitters are designed and fabricated which exhibit >0.3 dB power uniformity, >0.1 dB PDL and 1.5 dB coupling loss. By hybrid integration of the passive splitters and in-house fiber amplifiers, amplifying splitters are demonstrated at various signal intensities.

Effect of sol-gel process parameters on the properties of a Li1.3Ti1.7Al0.3(PO4)3 solid electrolyte for Li-ion batteries

2016 ◽  
Vol 68 (1) ◽  
pp. 28-34 ◽  
Author(s):  
Seoung Soo Lee ◽  
Jing Lee ◽  
Yeon-Gil Jung ◽  
Jae-Kwang Kim ◽  
Youngsik Kim
Keyword(s):  
Solid Electrolyte ◽  
Process Parameters ◽  
Sol Gel ◽  
Li Ion Batteries ◽  
Sol Gel Process ◽  
Li Ion

Studies on Preparation and Property of 2.5D SiO2f/ SiO2 Composites

2009 ◽  
Vol 79-82 ◽  
pp. 1767-1770 ◽  
Author(s):  
Shu Ang Han ◽  
Kai Hui Jiang ◽  
Jun Wu Tang
Keyword(s):  
Dielectric Properties ◽  
Flexural Strength ◽  
Process Parameters ◽  
Sol Gel ◽  
Microwave Drying ◽  
Optimal Parameters ◽  
Optimal Process ◽  
The Real ◽  
Sol Gel Process ◽  
5 Ghz

In this paper, 2.5D SiO2f/SiO2 composites were fabricated via sol-gel process employing 2.5D braided silica fiber fabrics as reinforcements and high pure silicasol as slurry. The process parameters are optimized and the optimal parameters are as follows: the silicasol of 30.8 wt. % as slurry, microwave drying, and sintering at 900 °C. Utilizing the optimal process parameters, the density and the flexural strength of the composites can reach 1.65 g•cm-3 and 80.68 MPa respectively. Dielectric properties of the 2.5D SiO2f/SiO2 composites were also measured, and the real part of the permittivity is 3.40 at 5 GHz. The excellent mechanical and dielectric properties of the 2.5D SiO2f/SiO2 composites can well meet the requirements of radome materials.

Studies of Process Parameters on Scale up of Nd:YAG Nanopowder Synthesis by Sol-gel Process

2012 ◽  
Vol 62 (3) ◽  
pp. 199-202
Author(s):  
Kiranmala Laishram ◽  
Rekha Mann ◽  
Neelam Malhan ◽  
Ravi Gupta
Keyword(s):  
Process Parameters ◽  
Sol Gel ◽  
Scale Up ◽  
Sol Gel Process ◽  
Nanopowder Synthesis

scholarly journals A study of sol gel process parameters on CoCuMnOx selective coating characteristics

2020 ◽  
Vol 7 (2) ◽  
pp. 026410
Author(s):  
Fatma Taha ◽  
Nahed El Mahallawy ◽  
Madiha Shoeib
Keyword(s):  
Process Parameters ◽  
Sol Gel ◽  
Selective Coating ◽  
Sol Gel Process ◽  
Coating Characteristics

Optimization, modeling and characterization of sol-gel process parameters for the synthesis of nanostructured boron doped alumina catalyst supports

2016 ◽  
Vol 229 ◽  
pp. 134-144 ◽  
Author(s):  
Murat Efgan Kibar ◽  
Orhan Özcan ◽  
Yeşim Dusova-Teke ◽  
Esra Yonel-Gumruk ◽  
Ayşe Nilgün Akin
Keyword(s):  
Process Parameters ◽  
Sol Gel ◽  
Catalyst Supports ◽  
Alumina Catalyst ◽  
Optimization Modeling ◽  
Boron Doped ◽  
Sol Gel Process

Elaboration of Sol-Gel Coatings from Aerogels and Xerogels of Doped Zirconia for TBC Applications

2010 ◽  
Vol 89-91 ◽  
pp. 184-189 ◽  
Author(s):  
Justine Fenech ◽  
Céline Viazzi ◽  
Florence Ansart ◽  
Jean Pierre Bonino
Keyword(s):  
Thermal Conductivity ◽  
Vapour Deposition ◽  
Sol Gel ◽  
Ceramic Coatings ◽  
Dip Coating ◽  
Thermal Barrier ◽  
Aircraft Engines ◽  
Sol Gel Process ◽  
Mechanical Performances ◽  
Industrial Gas Turbine

Thermal Barrier Coatings (TBCs) are used as insulators on hot section components to reduce operating temperatures in aircraft engines and industrial gas turbine. The TBC system consists of two layers: the ceramic top coat traditionally Yttria Stabilized Zirconia (YSZ) with a low conductivity, and the bond coat generally MCrAlY, M=Ni and/or Cr or Co or Pd or Pt modified aluminides. In the industry, two dry-route processes used to deposit TBCs give quite different microstructures of coatings. In one hand, coatings resulted by plasma spraying (PS) present a lamellar microstruture with a low thermal conductivity in the range from 0.7 to 0.9 Wm−1K−1. In the other hand, Electron Beam Physical Vapour Deposition (EBPVD) coatings with columnar microstruture coatings present the best mechanical performances but perpendicular orientation of the columns makes their thermal conductivity twice higher compared to PS coatings. The present study proposes the elaboration of zirconia coatings via the sol-gel route combined with dip-coating process. It is a versatile process able to produce either thin ceramic coatings or thick deposits. The main advantage of this method is to decrease the crystallization temperature, much lower than conventional processes. Moreover, the sol-gel process is a nondirectional deposition technique, which is very different to the physical methods described above. Doped zirconia have been chosen to constitute isolating multilayers coatings. Sol formulation, slurries stability but also dip-coating conditions have been optimized in order to obtain homogeneous layers on nickel based superalloys substrates.

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