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Online since: June 2011
Authors: Mohammad Reza Vaezi, Sayed Khatiboleslam Sadrnezhaad, Shahab Khameneh Asl, M. Kianpour Rad
THE EFFECT OF MICROSTRUCTURE ON THE PHOTOCATALYTIC PROPERTIES OF TiO2
Shahab Khameneh Asl1,2,a*, M.
The goal of this work was to modify the photocatalytic properties of nano-crystalline TiO2 powders by wet chemical routes and hydrothermal methods to understand the mechanism leading to these modifications The principal factors that influence the photocatalytic properties are on the one hand the concentration and nature of the chemical and physical conditions in TiO2, and on the other hand the morphology of the powders.
The photo catalytically properties in batch or CRS mode were measured in room temperature.
The resultant photocatalytic activity is dominated by the balance among these factors.
Thus, suitable bulk and surface properties, and energy structure are required for photocatalysts.
The goal of this work was to modify the photocatalytic properties of nano-crystalline TiO2 powders by wet chemical routes and hydrothermal methods to understand the mechanism leading to these modifications The principal factors that influence the photocatalytic properties are on the one hand the concentration and nature of the chemical and physical conditions in TiO2, and on the other hand the morphology of the powders.
The photo catalytically properties in batch or CRS mode were measured in room temperature.
The resultant photocatalytic activity is dominated by the balance among these factors.
Thus, suitable bulk and surface properties, and energy structure are required for photocatalysts.
Online since: November 2007
Authors: K. Watanabe, Mitsuharu Yamamoto, Kazuhito Fujiwara, Tetsuyuki Hiroe, Hidehiro Hata
Explosive driven rapid fracture in a structural body will be preceded by a compression
process, and the compression effects on mechanical properties of the materials are clearly important
to understand shock-induced failure such as spall or fragmentation phenomena.
Measured mechanical properties of the recovered specimens reveal remarkable changes from those of the virgin materials, giving some considerations on the dynamic fracture [2-4, 7] induced by shocks.
Mechanical Properties of Recovered Plates and Discussions Microhardness.
It is noticeable that this tendency almost corresponds with the data of Fig. 8, where the ratio of the products of fεσ ⋅2.0 in Eq. 4 of precompressed specimens to those for virgin materials are 63.9% (A2017), 84.6% (A2017/AT-attached) and 122.4% (304SS), although cylinder fragmentation phenomenon must be affected by some other factors.
Steinberg: Equation of State and Strength Properties of Selected Materials, LLNL Report UCRL-MA-106439, (1991)
Measured mechanical properties of the recovered specimens reveal remarkable changes from those of the virgin materials, giving some considerations on the dynamic fracture [2-4, 7] induced by shocks.
Mechanical Properties of Recovered Plates and Discussions Microhardness.
It is noticeable that this tendency almost corresponds with the data of Fig. 8, where the ratio of the products of fεσ ⋅2.0 in Eq. 4 of precompressed specimens to those for virgin materials are 63.9% (A2017), 84.6% (A2017/AT-attached) and 122.4% (304SS), although cylinder fragmentation phenomenon must be affected by some other factors.
Steinberg: Equation of State and Strength Properties of Selected Materials, LLNL Report UCRL-MA-106439, (1991)
Online since: November 2012
Authors: Wen Tao Yu, Shu Qin Liu, Hong Wei Li, You Peng Fan
The retainer bearing will be misaligned for mechanical errors, which leads to the uneven air gap of AMB and affects the performance of AMB.
But in fact, the axis of AMBs and retainer bearings will not be coincident for mechanical machining and assembling errors[3], which will affect AMB performance for the uneven air gap distribution.
Commonly, the factor t is from 1 to 9[9].
(2) The smaller the factor t is and the bigger the factor e1 is, the more severe variations of Ke/K and ξe/ξo are.
Traxler, Active magnetic bearing—basic, properties and application of active magnetic bearing (Zurich, Switzerland: ETH, 1994)
But in fact, the axis of AMBs and retainer bearings will not be coincident for mechanical machining and assembling errors[3], which will affect AMB performance for the uneven air gap distribution.
Commonly, the factor t is from 1 to 9[9].
(2) The smaller the factor t is and the bigger the factor e1 is, the more severe variations of Ke/K and ξe/ξo are.
Traxler, Active magnetic bearing—basic, properties and application of active magnetic bearing (Zurich, Switzerland: ETH, 1994)
Online since: December 2011
Authors: Lu Hai Li, Xu Wei Hu, Li Xin Mo, Sheng Min Zhao, Xian Leng, Wei Wei Li, Wen Bo Li, Hua Fang, Shu Kun Li
Flake silver powder has attracted tremendous interesting due to its specially electrical and optical properties.
Currently, mechanical milling is the main method to industrially produce flake silver powder.
Any changes in reaction conditions would affect the shape of silver particles.
Factors influencing the generation mechanism of flake silver particles The shape of the silver particles is decided by internal and external factors.
Conclusions The shape of silver particles is mainly influenced by external factors.
Currently, mechanical milling is the main method to industrially produce flake silver powder.
Any changes in reaction conditions would affect the shape of silver particles.
Factors influencing the generation mechanism of flake silver particles The shape of the silver particles is decided by internal and external factors.
Conclusions The shape of silver particles is mainly influenced by external factors.
Online since: April 2014
Authors: Yan Wu, Xiao Xing Yan, Guo Yue Xu, Zhi Hui Wu
Many factors such as matting agents, formulation composition, and curing conditions affect the gloss of the coating, therefore, it is difficult to obtain the desired matt gloss of UV curable coating [6].
Therefore, it is required to improve the resistance to liquid properties and mechanical properties and reduce the gloss of the UV curable coatings.
However, very few studies have been carried out on the gloss, resistance to liquid properties and mechanical properties of wood flooring UV coatings.
Orthogonal tests were applied to analyze the influence of the three factors on the properties of modified wood flooring UV coatings performance.
The resistance to liquid properties, mechanical properties and gloss of wood flooring UV coatings depends strongly on the content of nano-silica.
Therefore, it is required to improve the resistance to liquid properties and mechanical properties and reduce the gloss of the UV curable coatings.
However, very few studies have been carried out on the gloss, resistance to liquid properties and mechanical properties of wood flooring UV coatings.
Orthogonal tests were applied to analyze the influence of the three factors on the properties of modified wood flooring UV coatings performance.
The resistance to liquid properties, mechanical properties and gloss of wood flooring UV coatings depends strongly on the content of nano-silica.
Online since: February 2022
Authors: Sergey V. Byvaltsev
Phase Composition of Ti
Note that the phase composition of the alloy affects not only the mechanical properties [18], but also the processes of interaction with gases.
The transition temperature [21], alloying with oxygen [22, 23] or nitrogen [24] determine the microstructure of the alloy, which affects its mechanical properties [25] and heat treatment modes [26, 27].
Several factors affect the hardness of the material, the concentration of substituted and embedded elements, microstructure, grain size, phase types, crystallographic orientation in which deformation occurs, and the type of processing [28, 29].
Griffin, Effect of oxygen and hydrogen on mechanical properties of commercial purity titanium, International Materials Reviews 41 (1) (1996) 1-12
Wouters, Hydrogen impact on the mechanical properties of three titanium alloys, 3rd International conference on metals and hydrogen, Gand, Belgium (2018)
The transition temperature [21], alloying with oxygen [22, 23] or nitrogen [24] determine the microstructure of the alloy, which affects its mechanical properties [25] and heat treatment modes [26, 27].
Several factors affect the hardness of the material, the concentration of substituted and embedded elements, microstructure, grain size, phase types, crystallographic orientation in which deformation occurs, and the type of processing [28, 29].
Griffin, Effect of oxygen and hydrogen on mechanical properties of commercial purity titanium, International Materials Reviews 41 (1) (1996) 1-12
Wouters, Hydrogen impact on the mechanical properties of three titanium alloys, 3rd International conference on metals and hydrogen, Gand, Belgium (2018)
Online since: April 2019
Authors: Surat Triwanapong, Kittipong Kimapong
So, this research work aimed to study an effect of the shielding gas type on the mechanical properties of the dissimilar SS400/SUS304 steels butt joint.
A relation between microstructure and the mechanical properties of the butt joint was also investigated and compared.
Mathew, Selection of filler wire for and effect of auto tempering on the mechanical properties of dissimilar metal joint between 403 and 304L(N) stainless steels, Journal of Materials Processing Technology 209 (2009) 1428-1435
Alsaran, Mechanical and Structural Properties of Similar and Dissimilar Steel Joints, Materials Characterization 43 (1999) 311-318
Shanmugarajan, Effect of shielding gases on microstructure and mechanical properties of super austenitic stainless steel by hybrid welding, Materials & Design 33 (2012) 203-212
A relation between microstructure and the mechanical properties of the butt joint was also investigated and compared.
Mathew, Selection of filler wire for and effect of auto tempering on the mechanical properties of dissimilar metal joint between 403 and 304L(N) stainless steels, Journal of Materials Processing Technology 209 (2009) 1428-1435
Alsaran, Mechanical and Structural Properties of Similar and Dissimilar Steel Joints, Materials Characterization 43 (1999) 311-318
Shanmugarajan, Effect of shielding gases on microstructure and mechanical properties of super austenitic stainless steel by hybrid welding, Materials & Design 33 (2012) 203-212
Online since: August 2013
Authors: Worapong Boonchouytan, S. Rawangwong, J. Chatthong, R. Burapa
Procedures no.2 studied the factors affecting surface roughness in the aluminum face milling process by using completely randomized factorial designs with 5 repeated treatments for reducing the variation of sampling.
Table 2 and Fig. 3 revealed that the main factors affecting the surface roughness of aluminum were feed rate and speed with tendency of higher surface roughness when feed rate and speed increase from 1,300 to 1,800 mm/min and 3,200 to 4,200 rpm respectively.
Fig. 4 shows that it has not the other factors to affect with the surface roughness.
The other factors were dependent affect the surface roughness.
Wannasin, Effects of primary phase morphology on mechanical properties of Al-Si-Mg-Fe alloy in semi-solid slurry casting process, Trans.
Table 2 and Fig. 3 revealed that the main factors affecting the surface roughness of aluminum were feed rate and speed with tendency of higher surface roughness when feed rate and speed increase from 1,300 to 1,800 mm/min and 3,200 to 4,200 rpm respectively.
Fig. 4 shows that it has not the other factors to affect with the surface roughness.
The other factors were dependent affect the surface roughness.
Wannasin, Effects of primary phase morphology on mechanical properties of Al-Si-Mg-Fe alloy in semi-solid slurry casting process, Trans.
Online since: April 2014
Authors: Li Ping Zhao, Y.Y. Yao, Sheng Hu, Wen Jie Bai
This method can improve the mechanical properties of materials in some degree.
In order to solve the damage problem which is generated in the perform process planning for the layered carbon fiber composite, the influencing factors and interaction rules of the damage for reinforced carbon fiber is analyzed by using the finite element theory and dynamic analysis model, influence factors for damage is shown in Fig. 1.
This reflects the preform stress damage impact on the jet factors such as jet pressure, the geometric parameters of carbon-cloth and characteristic parameters.
This type of damage can affect stress release channel of the preform crack.
While the load direction affects the strain distribution heavier.
In order to solve the damage problem which is generated in the perform process planning for the layered carbon fiber composite, the influencing factors and interaction rules of the damage for reinforced carbon fiber is analyzed by using the finite element theory and dynamic analysis model, influence factors for damage is shown in Fig. 1.
This reflects the preform stress damage impact on the jet factors such as jet pressure, the geometric parameters of carbon-cloth and characteristic parameters.
This type of damage can affect stress release channel of the preform crack.
While the load direction affects the strain distribution heavier.
Online since: August 2018
Authors: Rahida Wati Sharudin, Muhammad Shafiq Shayuti, Md Azmi Nik Salwani
Polypropylene is also a semi-crystalline polymer where its properties and behaviour are affected by the thermal/mechanical properties during processing.
Introduction Polypropylene is a semi-crystalline polymer where the thermal/mechanical properties during processing play an important factor in affecting their behaviour [1].
There are many factors affecting the foaming process of polymers.
Molecular modelling technique can be used to predict the macroscopic properties as well as explaining the molecular mechanisms which will be affecting the structural/properties relationships [7].
Effect of supercritical carbon dioxide treatment on structure and mechanical properties of b-nucleated polypropylene processed at different temperatures.
Introduction Polypropylene is a semi-crystalline polymer where the thermal/mechanical properties during processing play an important factor in affecting their behaviour [1].
There are many factors affecting the foaming process of polymers.
Molecular modelling technique can be used to predict the macroscopic properties as well as explaining the molecular mechanisms which will be affecting the structural/properties relationships [7].
Effect of supercritical carbon dioxide treatment on structure and mechanical properties of b-nucleated polypropylene processed at different temperatures.