Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: October 2014
Authors: Recai Kus, Mahmut Unaldi
The particle size distribution, i.e. the number of particles of different sizes, is responsible for important physical and chemical properties such as: mechanical bulk behaviour, surface reaction, miscibility, filtration properties, conductivity, compressibility etc.
Organic compounds such as Cashew and Miscanthus have larger grain particle size since milling machine was used. [13] Fig.1: Sieve analysis and apparent densities of brake pad components Apparent density For powders and granules the apparent (bulk) density can be determined by the ratio of the mass to a given volume.
In the first stage of the study, grain size and apparent density characteristics of powdered brake pad components that affecting the production process were determined.
Acknowledgement The data in this paper were benefited from Ph.D. thesis studies of Mahmut Ünaldı supported by the Selcuk University Scientific Research Projects (B.A.P) under grant number 13101024.
Organic compounds such as Cashew and Miscanthus have larger grain particle size since milling machine was used. [13] Fig.1: Sieve analysis and apparent densities of brake pad components Apparent density For powders and granules the apparent (bulk) density can be determined by the ratio of the mass to a given volume.
In the first stage of the study, grain size and apparent density characteristics of powdered brake pad components that affecting the production process were determined.
Acknowledgement The data in this paper were benefited from Ph.D. thesis studies of Mahmut Ünaldı supported by the Selcuk University Scientific Research Projects (B.A.P) under grant number 13101024.
Online since: January 2015
Authors: Sergey Semenov, Oleg Stolyarov, Michail Beliaev
Along with a number of important positive properties of concrete structures, such as strength and stiffness, their mass is very large, and metal fittings limits the size and shape of a concrete structure.
There are a large number of studies involving the use of textile mesh for reinforcing concrete, including both natural [6] and synthetic fibers [7,8].
The constitutes of fine grained concrete (kg/m3) are shown in Table 1 Table 1.
The constitutes of fine grained concrete Portland cement Fly ash Sand (0-0.25 [mm]) Sand (0.2-0.6 [mm]) Plasticizer Silica fume Water 490 175 499 714 7 70 245 In the experiment, Portland cement M400 D20 (CEM II A-W 32.5 H) was used.
There are a large number of studies involving the use of textile mesh for reinforcing concrete, including both natural [6] and synthetic fibers [7,8].
The constitutes of fine grained concrete (kg/m3) are shown in Table 1 Table 1.
The constitutes of fine grained concrete Portland cement Fly ash Sand (0-0.25 [mm]) Sand (0.2-0.6 [mm]) Plasticizer Silica fume Water 490 175 499 714 7 70 245 In the experiment, Portland cement M400 D20 (CEM II A-W 32.5 H) was used.
Online since: October 2012
Authors: Xiang Jie Yang, Ming Wang, Hong Min Guo
The trajectory of duct was adjusted through the parametric equation of helical curve:
r (t)=t*A*C +R (1)
theta (t)=t*360*C (2)
z (t)=t*H (3)
The helical curve cylindrical coordinates equation is given by equations (1)-(3). t ranges from 0 to 1; r (t) represents a variable radius; theta (t) represents the helical angle; z (t) represents helical height; A represents an increment of radius per turn; R represents the original radius; C represents the number of turns; H represents helical total height, pitch multiplied by the number of turns.
Ultimately, they could grow into individual grains, resulting in significant grain refinement.
Ultimately, they could grow into individual grains, resulting in significant grain refinement.
Online since: October 2011
Authors: Yong Tian, Guo Dong Wang, Shuai Tang, Pu Wang
As the finishing cooling temperature during the rolling of pipeline steels decreases, the yield strength tends to increase because of the grain refinement effect and the increased volume fraction of low-temperature transformation phases [3].
Table 1 Parameters of ADCOS-PM in Shouqin steel Item Unit Value Length of ADCOS-PM m 8 Maximum Water Quantity m3/h 5000 Water pressure MPa 0.5 Number of nozzle 9 Industrial Production of X70 Pipeline Steel through UFC ADCOS-PM has been recently implemented on the 4300mm production line of Shouqin Steel.
Ultra fast cooling of plates immediately after the last finishing rolling pass will lead to ferrite grain refinement and finer precipitation of Nb(C, N) [4].
Therefore, the number of blocks rolled per hour raised from 18 to 27 maximum.
Table 1 Parameters of ADCOS-PM in Shouqin steel Item Unit Value Length of ADCOS-PM m 8 Maximum Water Quantity m3/h 5000 Water pressure MPa 0.5 Number of nozzle 9 Industrial Production of X70 Pipeline Steel through UFC ADCOS-PM has been recently implemented on the 4300mm production line of Shouqin Steel.
Ultra fast cooling of plates immediately after the last finishing rolling pass will lead to ferrite grain refinement and finer precipitation of Nb(C, N) [4].
Therefore, the number of blocks rolled per hour raised from 18 to 27 maximum.
Online since: April 2020
Authors: Gorkem Muttalip Simsek, Guney Guven Yapici
Finally, Cho et al. focused on the relation between grain size and transformation elongation as a function of annealing temperature.
They found that the average grain size and transformation elongation increases with the increase of annealing temperature [20].
Increased tendency for precipitation with longer heat treatment has been shown in a number of studies [20, 30].
Cyclic experiments were performed for each heat treatment condition with the aim of determining the actuation force at a fixed number of cycles, 100 in the present case.
They found that the average grain size and transformation elongation increases with the increase of annealing temperature [20].
Increased tendency for precipitation with longer heat treatment has been shown in a number of studies [20, 30].
Cyclic experiments were performed for each heat treatment condition with the aim of determining the actuation force at a fixed number of cycles, 100 in the present case.
A Study on Working Process of Wire-EDM by Using Two Different Dielectric Fluids on HCHCr Alloy Steel
Online since: September 2016
Authors: S.K. Dinesh Kumar, R. Selvanayagam, M. Sivakumar, S. Krishnaraj
Chromium particles of 70–80µm grain size produced maximum MRR, whereas copper particles have negligible effect due to high density.
Additionally It reported that for the fixed concentration smaller the grain size, the MRR is higher with lower TWR
Important properties of the AISI D3 Alloy steel are listed in Table 1 Table 1 Chemical Composition of D3 Alloy Steel (SPECTROMETRY TEST) Element C Si Mn P S Cr Mo Ni V W Fe % 2.265 0.326 0.358 0.019 0.024 12.25 0.021 0.025 0.009 0.021 84.66 Copper Powder Copper is a chemical element with the symbol Cu with atomic number 29.
This L18 orthogonal array helps to reduce the number of experiments to be conducted.
Additionally It reported that for the fixed concentration smaller the grain size, the MRR is higher with lower TWR
Important properties of the AISI D3 Alloy steel are listed in Table 1 Table 1 Chemical Composition of D3 Alloy Steel (SPECTROMETRY TEST) Element C Si Mn P S Cr Mo Ni V W Fe % 2.265 0.326 0.358 0.019 0.024 12.25 0.021 0.025 0.009 0.021 84.66 Copper Powder Copper is a chemical element with the symbol Cu with atomic number 29.
This L18 orthogonal array helps to reduce the number of experiments to be conducted.
Online since: January 2012
Authors: Yi Min Zhu, Zhi Jun Ma, Guo Liang Liu, Yan Qi
Theoretical Analysis of the FTIR Absorption Characteristic of Nano-powder
Guoliang Liua,Yan Qib,Yimin Zhuc and Zhijun Mad
School of Resources and Civil Engineering,
Northeastern University, Shenyang, Liaoning 110004, China
aliuguoliang024@yahoo.com.cn,bqi_yan0403@126.com,c zhuyimin@mail.neu.edu.cn, dmazhijun@mail.neu.edu.cn
Keywords: Particle size.Nano-MgO powder.Wave number of vibration
Abstract.
Fig. 3 The relationship between grain size and wavenumber of MgO Table 1 Infrared absorption peak position Sample No Mg-O vibration adsorption bent (cm-1) Mg(OH)2 Molecule Vibration(cm-1) O-H benting Vibration(cm-1) O-H Stretching Vibration of (cm -1) 1# 400~582.426 1440.636 1631.563 3461.769 2# 400~592.069 1448.350 1631.563 3442.483 3# 400~609.426 1430.993 1629.635 3454.054 4# 400~611.354 1452.207 1629.635 3457.912 5# 400~617.140 1469.564 1631.563 3446.340 6# 400~619.068 1457.993 1629.635 3450.197 7# 400~621.131 1477.278 1630.171 3450.197 8# 400~631.153 1460.582 1630.320 3450.127 9# 400~603.640 1457.993 1629.635 3442.483 10# 400~601.711 1457.993 1643.135 3454.054 11# 400~593.997 1457.993 1631.563 3448.269 12# 400~575.562 1457.993 1630.127 3463.697 The conclusion can be acquired by the analysis above: (1)Overall speaking, the infrared absorption peaks of nano-MgO is wider than conventional MgO, namely the ability of absorption increased and the fine structure decreased even disappear
Fig. 3 The relationship between grain size and wavenumber of MgO Table 1 Infrared absorption peak position Sample No Mg-O vibration adsorption bent (cm-1) Mg(OH)2 Molecule Vibration(cm-1) O-H benting Vibration(cm-1) O-H Stretching Vibration of (cm -1) 1# 400~582.426 1440.636 1631.563 3461.769 2# 400~592.069 1448.350 1631.563 3442.483 3# 400~609.426 1430.993 1629.635 3454.054 4# 400~611.354 1452.207 1629.635 3457.912 5# 400~617.140 1469.564 1631.563 3446.340 6# 400~619.068 1457.993 1629.635 3450.197 7# 400~621.131 1477.278 1630.171 3450.197 8# 400~631.153 1460.582 1630.320 3450.127 9# 400~603.640 1457.993 1629.635 3442.483 10# 400~601.711 1457.993 1643.135 3454.054 11# 400~593.997 1457.993 1631.563 3448.269 12# 400~575.562 1457.993 1630.127 3463.697 The conclusion can be acquired by the analysis above: (1)Overall speaking, the infrared absorption peaks of nano-MgO is wider than conventional MgO, namely the ability of absorption increased and the fine structure decreased even disappear
Online since: December 2014
Authors: Xiao Xia Li
With the rapid development of economy and a large number of energy consumption, the countries all over the world are faced with the depletion of fossil energy resources.
Meanwhile, a large number of fossil energy extraction cause geological disasters frequently and the greenhouse effect, which lead to global warming, acid rain and other serious environmental problems.
With the rapid development of economy and a large number of energy consumption, this world is faced with the depletion of fossil energy resources.
Cellulose has a structural formula: (C6H10O5)n (n is the number of glucose group, called the degree of polymerization (DP), whose value is hundreds to thousands or even over ten thousand).
Current energy plants taking part in alcohol production are mainly sugar crop, starch grains and fiber plants.
Meanwhile, a large number of fossil energy extraction cause geological disasters frequently and the greenhouse effect, which lead to global warming, acid rain and other serious environmental problems.
With the rapid development of economy and a large number of energy consumption, this world is faced with the depletion of fossil energy resources.
Cellulose has a structural formula: (C6H10O5)n (n is the number of glucose group, called the degree of polymerization (DP), whose value is hundreds to thousands or even over ten thousand).
Current energy plants taking part in alcohol production are mainly sugar crop, starch grains and fiber plants.
Online since: July 2015
Authors: Ramli Omar, Rusli Daik, Sepideh Soltaninejad, Mohamad Deraman, N.S.M. Nor, M.D. Norizam, N.H. Basri, B.N.M. Dollah
Supercapacitor electrodes in the form of activated carbon monoliths (ACMs) were prepared by carbonization and activation of three different composite of green monoliths (GMs) consisting of (a) self-adhesive carbon grains (SACG) derived from pre-carbonized oil palm empty fruit bunches, KOH and graphite additive, (b) KOH-treated SACG and HNO3-treated graphite additive, and (c) SACG and HNO3-treated graphite additive.
In the present study, the graphite additive were mixed without binder with self-adhesive carbon grains (SACG) derived from the pre-carbonized fibers of oil palm empty fruit bunches prior shaping the mixture into the green monoliths (GMs) composites that can be processed into activated carbon monoliths (ACMs) [5].
Larger charge-discharge times for the ACM3 cell indicate that higher number of electrons and electrolyte ions are involved during charging and discharging in this cell.
Ismail, Young’s modulus of carbon from self-adhesive carbon grain of oil palm bunches, J.
In the present study, the graphite additive were mixed without binder with self-adhesive carbon grains (SACG) derived from the pre-carbonized fibers of oil palm empty fruit bunches prior shaping the mixture into the green monoliths (GMs) composites that can be processed into activated carbon monoliths (ACMs) [5].
Larger charge-discharge times for the ACM3 cell indicate that higher number of electrons and electrolyte ions are involved during charging and discharging in this cell.
Ismail, Young’s modulus of carbon from self-adhesive carbon grain of oil palm bunches, J.
Online since: May 2013
Authors: Pavla Rovnaníková, Ámos Dufka, Rostislav Drochytka
The original stone Gothic fortress has undergone a number of reconstructions, the last one taking place in the mid 19th century when the castle acquired its current neo-Gothic, romantic look.
The original stone Gothic fortress erected by the Lords of Janovice has undergone a number of reconstructions in its history.
In such areas, no aggregate grains were found in the stucco and the structure of its surface differed from that of the rest of the facade.
The content of chlorides in a water extract from 10 g taken from a fine-milled sample (grains below 0.063 mm) was determined by standard solution Hg(NO3)2 titration.
The original stone Gothic fortress erected by the Lords of Janovice has undergone a number of reconstructions in its history.
In such areas, no aggregate grains were found in the stucco and the structure of its surface differed from that of the rest of the facade.
The content of chlorides in a water extract from 10 g taken from a fine-milled sample (grains below 0.063 mm) was determined by standard solution Hg(NO3)2 titration.