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Online since: April 2009
Authors: B.S. Sunder Daniel, Raja Ram Prasad
The co-relation between material compositions,
microstructure of the sinter pellets and the electrical properties of the sensors are discussed.
It is important to explore the possibility to enhance the ionic conductivity of calcia stabilized zirconia by studying the various parameters affecting it [11].
The following are the photographs showing clearly the micro structural properties.
The same Table 3 shows clearly the affect of sintering at 1500°C for 3 hours.
Further studies will be carried out to study the electrical properties of the pellets to study the feasibility for solid oxide fuel cell applications.
It is important to explore the possibility to enhance the ionic conductivity of calcia stabilized zirconia by studying the various parameters affecting it [11].
The following are the photographs showing clearly the micro structural properties.
The same Table 3 shows clearly the affect of sintering at 1500°C for 3 hours.
Further studies will be carried out to study the electrical properties of the pellets to study the feasibility for solid oxide fuel cell applications.
Online since: October 2017
Authors: Tarakol Hongkeab, Peerapan Dittanet, Kritsanachai Leelachai, Supissara Ruksanak, Supakeat Kambutong, Raymond A. Pearson
Effect of Cellulose Functionalization on Thermal and Mechanical Properties of Epoxy Resin
Kritsanachai Leelachai1,a, Supissara Ruksanak1,b, Tarakol Hongkeab1,c, Supakeat Kambutong2,d, Raymond A.
Thermal and mechanical properties.
Table 1 Values of thermal and mechanical properties of cellulose/EP composites at different filler contents.
Chen, Morphological structure and mechanical properties of epoxy polysulfonecellulose nanofiber ternary nanocomposites, Comp.
Hoa, Mechanical properties of carbon fiber reinforced epoxy/clay nanocomposites.
Thermal and mechanical properties.
Table 1 Values of thermal and mechanical properties of cellulose/EP composites at different filler contents.
Chen, Morphological structure and mechanical properties of epoxy polysulfonecellulose nanofiber ternary nanocomposites, Comp.
Hoa, Mechanical properties of carbon fiber reinforced epoxy/clay nanocomposites.
Structure Optimization of Slip by the Combination of Artificial Neural Network and Genetic Algorithm
Online since: February 2011
Authors: Shan Jun Zheng, Hong Lin Zhao, Dian Xin Li, Xian Long Liu, Shi Min Zhang, Dai Geng
It is difficult to optimize the slips because of complicated structure and many geometric parameters affecting the mechanical property of the slips.
There are many parameters effecting the mechanical property of the slip while doing optimization design.
In order to simplify the problem, we give preference to those factors effecting the mechanical property notably.
There are four factors in the design and each factor contains four levels.
The distribution of factors and levels are shown in table 1.
There are many parameters effecting the mechanical property of the slip while doing optimization design.
In order to simplify the problem, we give preference to those factors effecting the mechanical property notably.
There are four factors in the design and each factor contains four levels.
The distribution of factors and levels are shown in table 1.
Online since: October 2006
Authors: Maksim Kireitseu
Vibration Damping Properties of Nanotube-reinforced Materials
Maksim Kireitseu1,2
1
Institute of mechanics and machine reliability Academy of Sciences of Belarus, Lesnoe 19 - 62,
Minsk 223052
2
Department of Mechanical Engineering the University of Sheffield, the United Kingdom
m.kireitseu@shef.ac.uk or main@tridentworld.com
Keywords: composite, damping, vibrations, nanotube, polymer, spraying.
By invoking the properties of nanostructures, it may be possible to enhance the energy dissipation.
Small nanoparticle volume (up to 10% and up, if price drops) may greatly affect material's behaviour due to extreme nanoparticle properties over traditional materials [5-7].
Thermoplastic polymethylmethacrylate (PMMA), polyamide and polyurethane granular particle powders (Dupont Plastics, USA) were used for comparison of the technology capabilities and mechanical properties due to nanoparticle reinforcement.
The material has excellent adhesion, shear strength and energy absorbing/damping properties over bulk materials.
By invoking the properties of nanostructures, it may be possible to enhance the energy dissipation.
Small nanoparticle volume (up to 10% and up, if price drops) may greatly affect material's behaviour due to extreme nanoparticle properties over traditional materials [5-7].
Thermoplastic polymethylmethacrylate (PMMA), polyamide and polyurethane granular particle powders (Dupont Plastics, USA) were used for comparison of the technology capabilities and mechanical properties due to nanoparticle reinforcement.
The material has excellent adhesion, shear strength and energy absorbing/damping properties over bulk materials.
Online since: September 2010
Authors: Jaafar Sahari, Abu Bakar Sulong, Hendra Suherman
Introduction
Electrical conductivity of composite material with a polymeric matrix is mainly related to the
weight percentage of the conductive filler, the size and shape of its particles and also to other
factors such as adhesion between the host phase and the matrix, the method of processing and
possible interactions between the conductive and non conductive phase [1].
The major advantages of the material are lower cost and lightweight, good corrosion resistance, relatively good mechanical properties, and good gas tightness while the major disadvantage is that polymers have extremely low electrical conductivity, so excessive conductive filler has to be incorporated.
In this case, it is difficult to get high conductivity and sufficient mechanical properties simultaneously.
As a result, composite plate materials with high graphite content are extremely brittle, and have poor gas barrier properties.
Decreasing of hardness properties of SG and NG epoxy composite caused a lack of resin to bind the fillers, incomplete packing occurs during the fabrication process and thus, the fillers act as insulators and defects in the structure.
The major advantages of the material are lower cost and lightweight, good corrosion resistance, relatively good mechanical properties, and good gas tightness while the major disadvantage is that polymers have extremely low electrical conductivity, so excessive conductive filler has to be incorporated.
In this case, it is difficult to get high conductivity and sufficient mechanical properties simultaneously.
As a result, composite plate materials with high graphite content are extremely brittle, and have poor gas barrier properties.
Decreasing of hardness properties of SG and NG epoxy composite caused a lack of resin to bind the fillers, incomplete packing occurs during the fabrication process and thus, the fillers act as insulators and defects in the structure.
Online since: October 2023
Authors: Suchismita Satapathy, Manas R Das, Lalit K Pothal
To improve sound absorbing property, porosity and water absorption tests are also conducted by adding rice husk.
Many individuals are unaware that noise pollution is a serious issue that affects human health, including their own.
However, markers of quality of life and mental health appear to be more affected by noise.
For this purpose, there exists a wide range of sound absorbing materials which provide absorption properties that depend on the frequencies, composition, thickness, density, porosity etc.
They are produced in rolls with different thermal, acoustical and mechanical properties.
Many individuals are unaware that noise pollution is a serious issue that affects human health, including their own.
However, markers of quality of life and mental health appear to be more affected by noise.
For this purpose, there exists a wide range of sound absorbing materials which provide absorption properties that depend on the frequencies, composition, thickness, density, porosity etc.
They are produced in rolls with different thermal, acoustical and mechanical properties.
Online since: June 2015
Authors: Anton J. Bauer, Heiner Ryssel, Karl Otto Dohnke, Dirk Lewke, Hans Ulrich Zühlke, Mercedes Cerezuela Barreto, Martin Schellenberger
State-of-the-art mechanical blade dicing
Mechanical blade dicing is the state-of-the-art dicing technology in semiconductor industry not only for SiC.
These characteristics are dependent to the mechanical properties of the material.
The laser heats up the material to some hundred degrees Celsius without affecting the temperature sensitive polyimide coating near dicing street.
Although, TLS is a two-step process the throughput can be increased by a factor of 10 compared with mechanical blade dicing.
Goldberg et al.: “Properties of Advanced Semiconductor Materials GaN, AlN, SiC, BN, SiC, SiGe”; John Wiley & Sons; New York, pp. 93-148, 2001 [3] H.
These characteristics are dependent to the mechanical properties of the material.
The laser heats up the material to some hundred degrees Celsius without affecting the temperature sensitive polyimide coating near dicing street.
Although, TLS is a two-step process the throughput can be increased by a factor of 10 compared with mechanical blade dicing.
Goldberg et al.: “Properties of Advanced Semiconductor Materials GaN, AlN, SiC, BN, SiC, SiGe”; John Wiley & Sons; New York, pp. 93-148, 2001 [3] H.
Online since: August 2017
Authors: Winita Punyodom, Sawarot Phetsuk, Puttinan Meepowpan, Nawee Kungwan, Wanich Limwanich
The thermal, mechanical and degradation properties of these polymers are strongly depended on their crystallinity [7-9].
Tsuji and Ikada [7] reported that the properties of neat PLL membrane depended on the crystallinity.
From these previous reports, it is clearly seen that the study of crystallization is necessary for understanding the factors that affect the properties of the design materials.
Ikada, Properties and morphologies of poly(l-lactide): 1.
Ruth, The effect of crystallinity on the deformation mechanism and bulk mechanical properties of PLLA, Biomaterials 26 (2005) 5771-5782
Tsuji and Ikada [7] reported that the properties of neat PLL membrane depended on the crystallinity.
From these previous reports, it is clearly seen that the study of crystallization is necessary for understanding the factors that affect the properties of the design materials.
Ikada, Properties and morphologies of poly(l-lactide): 1.
Ruth, The effect of crystallinity on the deformation mechanism and bulk mechanical properties of PLLA, Biomaterials 26 (2005) 5771-5782
Online since: June 2018
Authors: Haji Muhammad Muhmond, Hasse Fredriksson
The graphite nodule count, size distribution and homogenization of the nodules distribution are the factors which are of more significance for the properties of the material.
Introduction Cast iron is a composite type of alloy in which the graphite shape, size, count and distribution, all are affecting the mechanical and thermal properties of the alloy.
If the degree of non-homogeneity is higher, then the mechanical properties can be affected but if it exist locally in small areas then it might not have much influence on the overall mechanical behaviour.
A detail study was performed on these samples such as porosity distribution and comparison in the mechanical properties between different parts, but only the information regarding the graphite structure in some selected samples, is included here.
Seutens, The use of oxygen activity measurement to determine optimal properties of ductile iron during production, International Journal of Metalcasting, 4(2) (2010), 25-43.
Introduction Cast iron is a composite type of alloy in which the graphite shape, size, count and distribution, all are affecting the mechanical and thermal properties of the alloy.
If the degree of non-homogeneity is higher, then the mechanical properties can be affected but if it exist locally in small areas then it might not have much influence on the overall mechanical behaviour.
A detail study was performed on these samples such as porosity distribution and comparison in the mechanical properties between different parts, but only the information regarding the graphite structure in some selected samples, is included here.
Seutens, The use of oxygen activity measurement to determine optimal properties of ductile iron during production, International Journal of Metalcasting, 4(2) (2010), 25-43.
Online since: July 2016
Authors: Prin Boonkanit, Wittaya Pansong
Experiment on mechanical properties
A model relating the depth of penetration to the levels of one or more welding factors is an indispensable aid in the interpretation of results from an experimental design.
The result of experiment on mechanical properties of the welding line is shown in the Table 3.
The result ofexperiment on mechanical properties of the welding line Tensile Hardness (N/mm2) Receive impact at temperature of 0°C (Jul) Average hardness value (HV) 542.61 66 156.4 4.
[2] Moeinifar, S., Kokabi, A.H., Madaah Hosseini, H.R., Role of tandem submerged arc welding thermal cycles on properties of the heat affected zone in X80 micro alloyed pipe line steel.
Simulator thermal cycles on properties of the intercritically reheated heat affected zone.
The result of experiment on mechanical properties of the welding line is shown in the Table 3.
The result ofexperiment on mechanical properties of the welding line Tensile Hardness (N/mm2) Receive impact at temperature of 0°C (Jul) Average hardness value (HV) 542.61 66 156.4 4.
[2] Moeinifar, S., Kokabi, A.H., Madaah Hosseini, H.R., Role of tandem submerged arc welding thermal cycles on properties of the heat affected zone in X80 micro alloyed pipe line steel.
Simulator thermal cycles on properties of the intercritically reheated heat affected zone.