All-ceramic composite with layer-by-layer structure by advanced ceramic technology

2005 ◽  
Author(s):  
Kunio Yoshida ◽  
Hirokazu Ishii ◽  
Takahiro Kumada ◽  
Tomosumi Kamimura ◽  
Akio Ikesue ◽  
...  
Keyword(s):  
Ceramic Composite ◽  
Layer Structure ◽  
Ceramic Technology ◽  
Layer By Layer ◽  
Advanced Ceramic ◽  
All Ceramic

An interesting 1,4,2,5-dioxadiazine-furazan system: structural modification by incorporating versatile functionalities

2017 ◽  
Vol 46 (41) ◽  
pp. 14301-14309 ◽  
Author(s):  
Qiong Yu ◽  
Guangbin Cheng ◽  
Xuehai Ju ◽  
Chunxu Lu ◽  
Qiuhan Lin ◽  
...  
Keyword(s):  
Structural Modification ◽  
Layer Structure ◽  
Layer By Layer ◽  
Thermal Stabilities

An N-trinitroethylamino derivative and amminonium salt based on the 1,4,2,5-dioxadiazene-furazan system are synthesized and characterized. Due to their layer-by-layer structure, these two compounds show good thermal stabilities and low sensitivities.

Surface and Subsurface Study on EDG and EDM Processing of Advanced Ceramic Composite Material

2013 ◽  
Author(s):  
M. K. Satyarthi ◽  
Pulak M. Pandey
Keyword(s):  
Ceramic Material ◽  
Electric Discharge ◽  
Surface Finish ◽  
Ceramic Composite ◽  
Ceramic Composites ◽  
Recast Layer ◽  
Machining Processes ◽  
Workpiece Material ◽  
Advanced Ceramic ◽  
Subsurface Cracks

The advanced ceramic composites are made electrically conductive by doping with the conductive phase elements like TiN, TiC, TiB2 and TiCN. The doping of the naturally occurring nonconductive ceramic composite makes it suitable to be machined by unconventional machining processes where conductivity of the material plays prominent role. Though, the ceramic materials are fragile in nature, these are custom-tailored for the engineering applications. The machining of the ceramic material by conventional processes is quite difficult and leads to failure of the material under high cutting forces due to its fragile nature. In most of the cases deformities like surface and subsurface cracks, inclusion of pits and voids, deteriorates the functionality of the ceramic material. In our work, we have studied the surface and subsurface characteristics, while processing the material by electric discharge machining (EDM) and electric discharge grinding (EDG) processes. A setup has been designed, developed and mounted as an attachment on die-sinking EDM machining facility to carry out the EDG experiments. The conductive alumina ceramic has been chosen as workpiece material for processing. The surface characteristics has been observed by scanning electron microscopy (SEM) at the resolution of 1000X for EDG processed work pieces, and at 500X for EDM. In EDM machining, the surface contains the recast layer whereas in EDG, the recast layer is either removed or swept uniformly along the surface giving good glossy surface finish. It has been found that the components produced by EDM process contain prominent surface and subsurface cracks whereas such deformities are not visible in case of EDG processing. The best surface finish achieved is of the order of 0.04μm when processed by EDG.

Flexible TPU strain sensors with tunable sensitivity and stretchability by coupling AgNWs with rGO

2020 ◽  
Vol 8 (12) ◽  
pp. 4040-4048 ◽  
Author(s):  
Yan Li ◽  
Shan Wang ◽  
Zhi-chao Xiao ◽  
Yi Yang ◽  
Bo-wen Deng ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Layer Structure ◽  
High Sensitivity ◽  
Strain Sensors ◽  
Layer By Layer

The layer-by-layer structure formed by the synergistic effect of GO and AgNWs endows the strain sensors with high sensitivity and a wide working range.

Carbon-thin-layer protected WP with no passivation supported on acid-treated expanded graphite as efficient Pt Co-catalysts for methanol oxidation and oxygen reduction reactions

2018 ◽  
Vol 6 (45) ◽  
pp. 22636-22644 ◽  
Author(s):  
Chunyue Zhang ◽  
Ying Dai ◽  
Hun Chen ◽  
Yuanyuan Ma ◽  
Baojian Jing ◽  
...  
Keyword(s):  
Thin Layer ◽  
Oxygen Reduction ◽  
High Activity ◽  
Methanol Oxidation ◽  
Layer Structure ◽  
Expanded Graphite ◽  
Layer By Layer ◽  
Reduction Reactions ◽  
Oxygen Reduction Reactions ◽  
Co Catalysts

Pt-WP-CL/AEG catalysts with particles-encapsulated layer-by-layer structure obtain high activity and durability for methanol oxidation and oxygen reduction reactions.

Discription of Process for Sheet Material Deforming With Using of Parametric Solid-State Simulation

2018 ◽  
Vol 6 (1) ◽  
pp. 48-56 ◽  
Author(s):  
Р. Булычев ◽  
R. Bulychev ◽  
Т. Аюшеев ◽  
T. Ayusheev
Keyword(s):  
Solid State ◽  
Positive Impact ◽  
Layer Structure ◽  
Sheet Material ◽  
State Model ◽  
Design And Technology ◽  
Layer By Layer ◽  
Program Complex ◽  
Thickness Change ◽  
Layer Deformation

In this paper has been considered the process for simulation of technology for layer-by-layer deformation of sheet bars. In process describing the use of surface models is not desirable for reasons of design and technology, so as for each layer’s surface description its necessary to convert the original surface’s skeleton taking into account the layer thickness change, that leads to processed information’s volume increasing. To solve this problem has been used a perspective method of parametric solid-state simulation for description of sheet bar’s geometry and simulation process. This method has allowed describe a body of multi-layer construction, taking into account special features of sheet material’s layer-by-layer deformation technology. Considered model for assignment of shape and multi-layer structure made it possible to describe the process for formation of the designed shape from flat blank to finished sheet bar’s shape. In such a case, there is no operation for resetting of sought skeleton for interlayer surface. Basic program modules have been developed to describe the process for layer-by-layer deformation in MathCAD. The main program for process description includes the following modules: module for description of parametric solid-state model; module for description of the spinning tool’s motion trajectory; module for calculation of deformation process parameters; module for definition of deformation surface by rounded edges in the specified layer. The developed program complex was probated during manufacture of a detail with pyramidal shape. To implement the layer-by-layer deformation was used a CNC machine. The quoted results of theoretical and experimental researches on the example of manufacturing the pyramidal detail from sheet material have demonstrated that the use of such a form of description for multi-layer construction as parametric solid-state model has a positive impact on the obtaining detail’s surface quality improving.

Double-sided coordination assembly: superparamagnetic composite microspheres with layer-by-layer structure for protein separation

RSC Advances ◽  
2014 ◽  
Vol 4 (3) ◽  
pp. 1055-1061 ◽  
Author(s):  
Liqin Xie ◽  
Shaohua Ma ◽  
Qi Yang ◽  
Fang Lan ◽  
Yao Wu ◽  
...  
Keyword(s):  
Protein Separation ◽  
Layer Structure ◽  
Layer By Layer ◽  
Composite Microspheres
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