Research on PEMFC resistance relaxation characteristics and degradation under thermal cycles with different residual water locations

2021 ◽  
Author(s):  
Huipeng Niu ◽  
Changwei Ji ◽  
Shuofeng Wang ◽  
Chen Liang
Keyword(s):  
Residual Water ◽  
Thermal Cycles ◽  
Relaxation Characteristics ◽  
Resistance Relaxation

Deinking of recycled paper by coupling of the enzyme endo-β-1,4-D-glucanasa and the cellulose, and by using a laboratory flotation column

MRS Advances ◽  
2020 ◽  
Vol 5 (52-53) ◽  
pp. 2669-2678
Author(s):  
Jeovani González P. ◽  
Ramiro Escudero G
Keyword(s):  
Amino Acids ◽  
Sodium Hydroxide ◽  
Paper Industry ◽  
Computational Simulation ◽  
Cellulose Fibers ◽  
Residual Water ◽  
Chemical Reagent ◽  
Recycled Paper ◽  
Flotation Column ◽  
Hydrolysis Of

AbstractDeinking of recycled office (MOW) paper was carried out by using a flotation column and adding separately sodium hydroxide, and the enzyme Cellulase Thricodema Sp., as defibrillators.The de-inked cellulose fibers were characterized according to the standards of the paper industry, to compare the efficiency of the deinking of each chemical reagent used to hydrolyze the fibers and defibrillate them.The computational simulation of the molecular coupling between the enzyme and cellulose was performed, to establish the enzyme-cellulose molecular complex and then to identify the principal amino-acids of endo-β-1,4-D-glucanase in this molecular link, which are responsible for the hydrolysis of the cellulose.Experimental results show the feasibility to replace sodium hydroxide with the enzyme Cellulase Thricodema Sp., by obtaining deinked cellulose with similar optical and physical properties.The use of the enzyme instead of sodium hydroxide avoids the contamination of the residual water; in addition to that, the column is operated more easily, taking into consideration that the pH of the system goes from alkaline to neutral.

Laboratory Ageing Thermal Cycles of MV Cable Joints: results of different diagnostic techniques

2020 ◽  
Author(s):  
Johnny Borghetto ◽  
Alfredo Contin ◽  
Andrea Morotti ◽  
Andrea Pegoiani ◽  
Giovanni Pirovano ◽  
...  
Keyword(s):  
Diagnostic Techniques ◽  
Thermal Cycles

Determination of reservoir rock residual water using X-ray computed microtomography

2018 ◽  
pp. 38-42 ◽  
Author(s):  
I.V. Yazynina ◽  
◽  
E.V. Shelyago ◽  
A.A. Abrosimov ◽  
N.E. Grachev ◽  
...  
Keyword(s):  
Reservoir Rock ◽  
Residual Water ◽  
X Ray ◽  
Computed Microtomography ◽  
X Ray Computed

JUSTIFICATION OF THE RESIDUAL WATER SATURATION OF THE RESERVOIRS BASED ON THE DATA OF DIRECT CORE STUDIES

2020 ◽  
pp. 28-34
Author(s):  
I.S. Putilov ◽  
◽  
I.P. Gurbatova ◽  
S.V. Melekhin ◽  
M.S. Sergeev ◽  
...  
Keyword(s):  
Water Saturation ◽  
Residual Water

ULTRONZE

Alloy Digest ◽  
1981 ◽  
Vol 30 (5) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Stress Relaxation ◽  
Physical Properties ◽  
Copper Alloy ◽  
High Performance ◽  
Copper Alloys ◽  
Heat Treating ◽  
Bend Strength ◽  
Excellent Corrosion Resistance ◽  
Relaxation Characteristics

Abstract ULTRONZE is a copper alloy also known as Olin Alloy 654. It bridges the gap between standard high-performance copper alloys and beryllium-copper alloys, thus enabling the design of parts with properties previously only attainable with more expensive materials. The alloy has superior stress-relaxation characteristics, good bend performance and excellent corrosion resistance. Among its typical uses are electrical connectors, fuse clips and relay springs. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and bend strength. It also includes information on corrosion resistance as well as forming, heat treating, and machining. Filing Code: Cu-417. Producer or source: Olin Brass.

Research on the Stress-relaxation Characteristics of Cancer Cells Based on Atomic Force Microscope

2012 ◽  
Vol 8 (1) ◽  
pp. 47-49
Author(s):  
Jinghe Wang ◽  
Miao Yu ◽  
Zhichao Wu ◽  
Yingchun Liang ◽  
Shen Dong
Keyword(s):  
Stress Relaxation ◽  
Atomic Force Microscope ◽  
Cancer Cells ◽  
Atomic Force ◽  
Relaxation Characteristics

scholarly journals Contactless temperature measurement in wire-based electron beam additive manufacturing Ti-6Al-4V

2021 ◽  
Author(s):  
F. Pixner ◽  
R. Buzolin ◽  
S. Schönfelder ◽  
D. Theuermann ◽  
F. Warchomicka ◽  
...  
Keyword(s):  
Electron Beam ◽  
Additive Manufacturing ◽  
Thermal Imaging ◽  
Temperature Profiles ◽  
Layer By Layer ◽  
Thermal Cycles ◽  
Cooling Rates ◽  
Geometric Boundary ◽  
Microstructural Characterisation ◽  
Local Misorientation

AbstractThe complex thermal cycles and temperature distributions observed in additive manufacturing (AM) are of particular interest as these define the microstructure and the associated properties of the part being built. Due to the intrinsic, layer-by-layer material stacking performed, contact methods to measure temperature are not suitable, and contactless methods need to be considered. Contactless infrared irradiation techniques were applied by carrying out thermal imaging and point measurement methods using pyrometers to determine the spatial and temporal temperature distribution in wire-based electron beam AM. Due to the vacuum, additional challenges such as element evaporation must be overcome and additional shielding measures were taken to avoid interference with the contactless techniques. The emissivities were calibrated by thermocouple readings and geometric boundary conditions. Thermal cycles and temperature profiles were recorded during deposition; the temperature gradients are described and the associated temperature transients are derived. In the temperature range of the α+β field, the cooling rates fall within the range of 180 to 350 °C/s, and the microstructural characterisation indicates an associated expected transformation of β→α'+α with corresponding cooling rates. Fine acicular α and α’ formed and local misorientation was observed within α as a result of the temperature gradient and the formation of the α’.

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