scholarly journals Derivation of Single Phase Material Properties Equivalent to 1-3 Piezoelectric Composites by the Resonant Method

2011 ◽  
Vol 30 (7) ◽  
pp. 368-376 ◽  
Author(s):  
Jin-Wook Kim ◽  
Sung-Hun Pyo ◽  
Yong-Rae Roh
Keyword(s):  
Material Properties ◽  
Single Phase ◽  
Piezoelectric Composites ◽  
Resonant Method ◽  
Single Phase Material

Coupling an organic photosensitizer and an inorganic framework into a single-phase material that shows visible-light photocurrent response

CrystEngComm ◽  
2021 ◽  
Author(s):  
Tao Zhang ◽  
Yue-Qiao Hu ◽  
Qian-Wen Li ◽  
Wei-Peng Chen ◽  
Yan-Zhen Zheng
Keyword(s):  
Visible Light ◽  
Single Phase ◽  
Photocurrent Response ◽  
Inorganic Framework ◽  
Single Phase Material

A rare hybrid of a 3D Sn–Se type framework and a ruthenium(ii) photosensitizer has been synthesized, and exhibits visible light photocurrent response.

A Review on Non-Asbestos Friction Materials: Material Composition and Manufacturing

2018 ◽  
Vol 1150 ◽  
pp. 22-42
Author(s):  
Dinesh Shinde ◽  
Kishore N. Mistry ◽  
Suyog Jhavar ◽  
Sunil Pathak
Keyword(s):  
Composite Materials ◽  
Material Properties ◽  
Single Phase ◽  
Friction Material ◽  
Material Surface ◽  
Surface Wear ◽  
Friction Modifier ◽  
Friction Materials ◽  
Morphological Studies ◽  
The Impact

The peculiar feature of friction materials to absorb the kinetic energy of rotating wheels of an automobile to control the speed makes them remarkable in automobile field. The regulation of speed cannot be achieved with the use of single phase material as a friction material. Consequently, the friction material should be comprised of composite materials which consist of several ingredients. Incidentally, the friction materials were formulated with friction modifier, binders, fillers and reinforcements. Due to its pleasant physical properties, asbestos was being used as a filler. Past few decades, it is found that asbestos causes dangerous cancer to its inhaler, which provides a scope its replacement. Several attempts have been made to find an alternative to the hazardous asbestos. The efforts made by different researchers for the impact of every composition of composite friction material in the field are reviewed and studied for their effect on the properties of friction material. Surface morphological studies of different friction material are compared to interpret the concept of surface wear and its correlation with material properties.

Li-insertion Behavior in NanocrystallineTiO2-(MoO3)z Core-Shell Materials

2000 ◽  
Vol 658 ◽  
Author(s):  
Gregory J. Moore ◽  
Dominique Guyomard ◽  
Scott H. Elder
Keyword(s):  
Transition Metal ◽  
Surface Charge ◽  
Double Layer ◽  
Single Phase ◽  
Inductive Effect ◽  
Core Shell ◽  
Fundamental Study ◽  
The Core ◽  
Single Phase Material

ABSTRACTA fundamental study of the Li insertion behavior of a series of materials consisting of a TiO2 core having MoO3 on the surface has been carried out in order to determine the influence of the shell. These TiO2-(MoO3)z materials, where (z) denotes the fraction of coverage from a partial to a double layer, range in diameter from 40-100 Å. Calculations have been done on their theoretical lithium capacity using a maximum of Li0.5TiO2 for the core, and Li1.5MoO3 at the TiO2/MoO3 interface, and they have been compared to that found experimentally. The reversible Li-insertion capacity was shown to increase from 0.34 per Ti for the pure TiO2 sample, to 0.91 Li per transition metal when the MoO3 coverage increased to one monolayer. There was only one plateau observed in the electrochemical scans for the samples showing that they function as a single-phase material making them interesting for electrodes. The redox voltage of the TiO2/Li0.5TiO2 biphasic transformation increased 60 mV from the pure TiO2 to the sample containing one monolayer of MoO3. This effect was interpreted as due to a change in TiO2 surface charge coming from an inductive effect of Ti-O-Mo bonds.

Zur Frage Supraleitung in σ-Phase Nb-Al / Superconductivity and σ-Phase Nb — Al

1973 ◽  
Vol 28 (3-4) ◽  
pp. 472-474 ◽  
Author(s):  
A. Müller
Keyword(s):  
Heat Treatment ◽  
Single Phase ◽  
Alloy Structure ◽  
Σ Phase ◽  
O Phase ◽  
Single Phase Material

AbstractThe preparation and the alloy structure of Nb - Al samples containing σ.-phase are described. Using single-phase material it is shown that the o-phase Nb - Al, independent of composition and heat treatment, is not superconducting down to 1.3 K.

Research on a New Type of Metal Composite Material in Hot Forming and its Application

2010 ◽  
Vol 156-157 ◽  
pp. 582-591 ◽  
Author(s):  
Ning Ma ◽  
Ping Hu ◽  
Zong Hua Zhang
Keyword(s):  
Composite Material ◽  
Energy Absorption ◽  
Single Phase ◽  
Hot Forming ◽  
Boron Steel ◽  
Thin Wall ◽  
Metal Composite ◽  
Forming Technology ◽  
New Type ◽  
Single Phase Material

A new type of metal composite material can be manufactured by controlling heating temperature and designing the layout of cooling pipes in hot forming process of ultra high strength steel. The yield strength of this type of metal material varies from 380 MPa to 1000 MPa continuously, and its strength limitation varies from 480 MPa to 1600 MPa continuously. In this new hot forming technology, boron steel named as 22MnB5 is stamped by one-step process of hot forming to obtain the metal composite material and manufacture the part consisting of the metal composite at the same time. The hot forming technology of U-shaped part consisting of the metal composite material is provided. Then the microstructure of the U-shaped metal composite material is analyzed and the tensile test is also implemented. The experimental results show the material properties have the characteristics of continuous distribution along the main direction of energy absorption during crash process, which indicates the feasibility of hot forming technology of the metal composite material. The top-hat thin-wall structure consisting of U-shaped metal composite material is employed to analyze the crashworthiness of the new type of metal composite material. By distributing the single phase material of U-shaped composite part properly, the energy absorption ability is increased by 58.7% and the crash force is decreased by 23.4%, which indicate the new type of metal composite material has the comprehensive performance of every single phase material. So the metal composite is a good alternative material in application of crash resistance.

Modeling and Analysis of 1-3 Piezoelectric Composites

2002 ◽  
Author(s):  
Sanjay Nakhwa ◽  
Anil Saigal
Keyword(s):  
Boundary Conditions ◽  
Material Properties ◽  
Volume Fraction ◽  
Transversely Isotropic ◽  
Unit Cell ◽  
Coupling Constants ◽  
Upper And Lower Bounds ◽  
Piezoelectric Composite ◽  
Piezoelectric Composites ◽  
Material Constants

Theoretical results of the material properties of piezoelectric composites are generally limited to the transversely isotropic composites and are usually given in the form of upper and lower bounds. In most of these analyses all the material constants cannot be determined. However, the method of effective field has been used on a transversely isotropic piezoelectric composite to theoretically calculate all the ten material properties. In this work an alternative method to determine all the elastic, dielectric and piezoelectric coupling constants of 1-3 piezoelectric composite with periodic arrangement of fibers are investigated by using finite element analysis on a unit cell model. FEA of unit cell models for hexagonal, square with diagonal and square with edge orientation topologies are performed. Different mechanical and electrical loading patterns and their corresponding boundary conditions are formulated and simulated to get data necessary for deriving the various anisotropic material constants. FEA results are compared with those of the theoretical work. Effect of different parameters e.g. volume fraction, topology and electrical boundary conditions on the different material constants are discussed.

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