Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: November 2018
Authors: Volker Döge, Árpád W. Imre
On the other hand, by optimization of the physics and electrochemistry of the cells utilizing new materials and electrode structures, the nominal voltage can be increased and/or the internal resistances can be decreased without significant weight and volume increase.
In the center we see the aluminum (positive electrode) and copper foil (negative electrode) respectively, coated on both sides with corresponding active materials.
Thus, long open circuit periods are needed for a complete equilibration of the Li-ion concentration in the solid mater of electrode materials.
It is a small improvement over many years, nonetheless the Li-ion technology still has at least 20% potential to increase the specific energy by utilizing smaller porosities, stabilized material, solid electrolyte, Si-Graphite-anode and higher Ni content in the cathode materials.
Liu, "Battery-Supercapacitor Hybrid Devices: Recent Progress," Advanced Science News, vol. 4, 1-21, (2017)
In the center we see the aluminum (positive electrode) and copper foil (negative electrode) respectively, coated on both sides with corresponding active materials.
Thus, long open circuit periods are needed for a complete equilibration of the Li-ion concentration in the solid mater of electrode materials.
It is a small improvement over many years, nonetheless the Li-ion technology still has at least 20% potential to increase the specific energy by utilizing smaller porosities, stabilized material, solid electrolyte, Si-Graphite-anode and higher Ni content in the cathode materials.
Liu, "Battery-Supercapacitor Hybrid Devices: Recent Progress," Advanced Science News, vol. 4, 1-21, (2017)
Online since: July 2013
Authors: Pavel Procházka, František Vaněk
It is not the purpose to identify microcracks that are present in each material.
The method is based on an experimental or computational model, which is specific to each shape and material of the blades.
According to a selected model and material constants, the residual service life of blades is calculated.
Acknowledgements Support for this work by the Technology Agency of the Czech Republic (Grant TA02020728) and the Institute of Thermomechanics of the Czech Academy of Sciences, v.v.i. is gratefully acknowledged.
Yang, Cumulative fatigue damage and life prediction theories: a survey of the state of the art for homogeneous materials, Int.
The method is based on an experimental or computational model, which is specific to each shape and material of the blades.
According to a selected model and material constants, the residual service life of blades is calculated.
Acknowledgements Support for this work by the Technology Agency of the Czech Republic (Grant TA02020728) and the Institute of Thermomechanics of the Czech Academy of Sciences, v.v.i. is gratefully acknowledged.
Yang, Cumulative fatigue damage and life prediction theories: a survey of the state of the art for homogeneous materials, Int.
Online since: March 2020
Authors: Samson Olalekan Odeyemi, Mutiu Adelodun Akinpelu, Rasheed Abdulwahab, Kazeem Adeshina Dauda, Stella Chris-Ukaegbu
Fig. 1 Asa-Dam Bridge showing signs of scouring
Materials and Methods
Determination of the Bridge profile
The profile section of the bridge riverbed was obtained using an electronic surveying instrument (Total station).
The sieving continued until no material passed through the sieve.
It was ensured that no material was lost.
This process was repeated until the weight of the materials on each sieve and the retaining pan (typically the material passing the No. 200 sieve) were recorded.
Gavin, “A review of bridge scour monitoring techniques,” Journal Rock Mech.
The sieving continued until no material passed through the sieve.
It was ensured that no material was lost.
This process was repeated until the weight of the materials on each sieve and the retaining pan (typically the material passing the No. 200 sieve) were recorded.
Gavin, “A review of bridge scour monitoring techniques,” Journal Rock Mech.
Online since: January 2004
Authors: Jai Sung Lee, Sergiy V. Divinski, Christian Herzig
Journal Citation (to be inserted by the publisher)
Copyright by Trans Tech Publications
Grain Boundary Diffusion and Segregation
in Compacted and Sintered Nanocrystalline Alloys
Sergiy Divinski1, Jai-Sung Lee
2, and Christian Herzig1
1
Institut für Materialphysik, Universität Münster, Wilhelm-Klemm-Str. 10,
D-48149 Münster, Germany; email: divin@uni-muenster.de
2
Department of Metallurgy and Materials Science, Hanyang University, Ansan, 426-791 Korea
Keywords: Grain Boundary Diffusion; Interface Segregation; Nanocrystalline Alloys; Sintering.
Introduction Production of bulk nanocrystalline materials is a challenging task in designing new functional materials.
Ni diffusion in both materials was found to be similar.
By this grain growth, at the same time, the GB structure closely adopts that one of GBs in coarse-grained material, as indicated by the similarity of Fe or Ni GB self-diffusion in both materials [5,6].
This fact supports the conclusion that the diffusivities of the nanocrystalline (d~100nm) and coarse-grained (d~0.5mm) materials are very similar.
Introduction Production of bulk nanocrystalline materials is a challenging task in designing new functional materials.
Ni diffusion in both materials was found to be similar.
By this grain growth, at the same time, the GB structure closely adopts that one of GBs in coarse-grained material, as indicated by the similarity of Fe or Ni GB self-diffusion in both materials [5,6].
This fact supports the conclusion that the diffusivities of the nanocrystalline (d~100nm) and coarse-grained (d~0.5mm) materials are very similar.
Online since: June 2022
Authors: Van Tu Nguyen, Minh Tuan Nguyen, Minh Tuan Pham
Finite element analysis (FEA) is employed to evaluate the actual performance of the synthesized CPM with Ti6Al4V material in order to verify the correctness of the synthesis method.
Section 4 presents the simulation results of the synthesized CPM with Ti6Al4V material.
This material has a Young’s modulus of 111 GPa, Poisson ratio of 0.34, density of 4.5 g/cm3, and yield limit of 950 MPa.
Xu, "A totally decoupled piezo-driven xyz flexure parallel micropositioning stage for micro/nanomanipulation," IEEE Transactions on Automation Science and Engineering, vol. 8, no. 2, p. 265–279, 2011
Nai, "Design and Optimization of a Three Degrees-of-Freedom Spatial Motion Compliant Parallel Mechanism With Fully Decoupled Motion Characteristics," Journal of Mechanisms and Robotics, p. 051010, 2019.
Section 4 presents the simulation results of the synthesized CPM with Ti6Al4V material.
This material has a Young’s modulus of 111 GPa, Poisson ratio of 0.34, density of 4.5 g/cm3, and yield limit of 950 MPa.
Xu, "A totally decoupled piezo-driven xyz flexure parallel micropositioning stage for micro/nanomanipulation," IEEE Transactions on Automation Science and Engineering, vol. 8, no. 2, p. 265–279, 2011
Nai, "Design and Optimization of a Three Degrees-of-Freedom Spatial Motion Compliant Parallel Mechanism With Fully Decoupled Motion Characteristics," Journal of Mechanisms and Robotics, p. 051010, 2019.
Online since: October 2012
Authors: Zhi Ping Wang, Pin Chuan Chen
The original microfabrication techniques were derived from the semiconductor industry and the major substrate materials in the late 90’s were silicon and glass.
To obtain the goal of developing a microfluidic device that is low-cost, disposable, less hazardous fabrication processes, and mass produced, new substrate materials with associated fabrication techniques were explored such as polycarbonate, poly(methylmethacrylate) (PMMA), polydimethyl-siloxane (PDMS), and even paper [2].
Since micromilling is following the design pattern to remove materials from the substrate, so it can be used on different substrate materials from polymers to metals and create more possibilities in microstructure patterns and applications.
Brass is selected as the substrate material for micromilling since it is easy to machine and its strength is enough for hot embossing [20-21].
Limbach, “Enhanced machining of micron-scale features in microchip molding masters by CNC milling”, International Journal of Machine Tools & Manufacture 45 (2005) 1542–1550
To obtain the goal of developing a microfluidic device that is low-cost, disposable, less hazardous fabrication processes, and mass produced, new substrate materials with associated fabrication techniques were explored such as polycarbonate, poly(methylmethacrylate) (PMMA), polydimethyl-siloxane (PDMS), and even paper [2].
Since micromilling is following the design pattern to remove materials from the substrate, so it can be used on different substrate materials from polymers to metals and create more possibilities in microstructure patterns and applications.
Brass is selected as the substrate material for micromilling since it is easy to machine and its strength is enough for hot embossing [20-21].
Limbach, “Enhanced machining of micron-scale features in microchip molding masters by CNC milling”, International Journal of Machine Tools & Manufacture 45 (2005) 1542–1550
Online since: January 2017
Authors: Roberto Montanari, Alessandra Varone, Giuliano Angella, Riccardo Donnini, Giuseppe Barbieri
During the service life, the mechanical parts made of these materials operate at high stress and temperature level, in a quite harsh environment.
Table I- EBW BoP seam: chemical composition of the material measured by EDS microanalysis in base metal, HAZ and MZ.
Table II- Laser joints: chemical composition of the material measured by EDS microanalysis in base metal, HAZ and MZ.
Marchanty, Nickel-Based Superalloy Welding Practices for Industrial Gas Turbine Applications, Science and Technology of Welding and Joining 9 (2013)13-21
Tillack, Welding Journal 86 (2007) 28-32
Table I- EBW BoP seam: chemical composition of the material measured by EDS microanalysis in base metal, HAZ and MZ.
Table II- Laser joints: chemical composition of the material measured by EDS microanalysis in base metal, HAZ and MZ.
Marchanty, Nickel-Based Superalloy Welding Practices for Industrial Gas Turbine Applications, Science and Technology of Welding and Joining 9 (2013)13-21
Tillack, Welding Journal 86 (2007) 28-32
Online since: October 2015
Authors: Wacław Gierulski, Bożena Kaczmarska
They are linked to the material property of the enterprise as well as its intellectual property, research, design and production.
[2] Research & Development, Innovation, and the Science and Engineering Workforce, National Science Board 2012
Gierulski, International Research of Polish Public Universities-bibliometric analysis results Cooperation, in: Report on innovation of the Polish economy in Institut of Economic Sciences, Polish Academy of Sciences, Warsaw, 2012
Mijal, Bibliometrics in Management of Engineering and Scientific Research, Ministry of Science and Higher Education, Warsaw, 2012
A look at absorptive capacity, Journal of Global Business Issues 3/1 (2009) 15-21
[2] Research & Development, Innovation, and the Science and Engineering Workforce, National Science Board 2012
Gierulski, International Research of Polish Public Universities-bibliometric analysis results Cooperation, in: Report on innovation of the Polish economy in Institut of Economic Sciences, Polish Academy of Sciences, Warsaw, 2012
Mijal, Bibliometrics in Management of Engineering and Scientific Research, Ministry of Science and Higher Education, Warsaw, 2012
A look at absorptive capacity, Journal of Global Business Issues 3/1 (2009) 15-21
Online since: August 2013
Authors: Anthony Keita, Shih Hsien Yang
Introduction
Increased environmental awareness and sustainable construction materials concerns have led to the development of new technologies in the asphalt industry.
Materials and Methods The asphalt binder used in this study is a penetration grade binder 60/70 obtained from China Petroleum Cooperation (CPC).
In order to fully implement the WMA technology, it is important to understand its long-term field-aging characteristic since material aging the roots of many pavement distresses.
WA-RD 650.1, A thesis for partial fulfillment of the degree of Master of Science in Civil Engineering, University of Washington, Seattle, Washington, 2006
[3] Vaitkus, A., Čygas, D., Laurinavičius, A., and Perveneckas, Z., “Analysis and Evaluation of Possibilities for the Use of Warm Mix Asphalt in Lithuania,” The Baltic Journal of Road and Bridge Engineering, vol. 4, no. 2, pp. 80-86, 2009
Materials and Methods The asphalt binder used in this study is a penetration grade binder 60/70 obtained from China Petroleum Cooperation (CPC).
In order to fully implement the WMA technology, it is important to understand its long-term field-aging characteristic since material aging the roots of many pavement distresses.
WA-RD 650.1, A thesis for partial fulfillment of the degree of Master of Science in Civil Engineering, University of Washington, Seattle, Washington, 2006
[3] Vaitkus, A., Čygas, D., Laurinavičius, A., and Perveneckas, Z., “Analysis and Evaluation of Possibilities for the Use of Warm Mix Asphalt in Lithuania,” The Baltic Journal of Road and Bridge Engineering, vol. 4, no. 2, pp. 80-86, 2009
Online since: December 2022
Authors: Dong Guo, Shu Ling Zhang, Wu Shuai Zheng, Teng Long Huang, Feng Guo
Experimental
Materials.
This proves that a layer of material on the surface in Fig. 7b is oxide.
Acknowledgments The authors thank the National Natural Science Foundation of China (51861031) for support.
Bone formation at Ti-6Al-7Nb scaffolds consisting of 3D honeycomb frame and diamond-like carbon coating implanted into the femur of beagles, Journal of Biomedical Materials Research Part B-Applied Biomaterials. 109(2021) 1283-1291
Effect of dopants (F, Si) material on the structure and properties ofhydrogenated DLC film by plane cathode PECVD, Diamond Relat Mater. 110(2020) 108102
This proves that a layer of material on the surface in Fig. 7b is oxide.
Acknowledgments The authors thank the National Natural Science Foundation of China (51861031) for support.
Bone formation at Ti-6Al-7Nb scaffolds consisting of 3D honeycomb frame and diamond-like carbon coating implanted into the femur of beagles, Journal of Biomedical Materials Research Part B-Applied Biomaterials. 109(2021) 1283-1291
Effect of dopants (F, Si) material on the structure and properties ofhydrogenated DLC film by plane cathode PECVD, Diamond Relat Mater. 110(2020) 108102