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Online since: June 2019
Authors: Elyor Berdimurodov, Abduvali Kholikov, Khamdam Akbarov
The adsorption of the synthetic inhibitors on the metal surface depends upon numerous factors including the nature and number of potential adsorption sites along with the nature of the metal and testing medium [21-26]. 4.
For the highest accuracy results, maximum currents are normalized to the grain boundary are found microscopically.
Physico-Chemical Study of the Mechanism of Inhibition of the Corrosion of Steel Cucurbit [N] Uriles, Chemical Industry, Teza (Sank-Petersburg), Volume: 95, Number: 1, (2018), Pages: 38-42.
Online since: February 2021
Authors: Kamrun Nahar
Methanol+ water+ Acetic acid Beta -carotene. [28] Rose petals Rose is cut into small pieces and removing the pollen grain soaked into 250 ml ethanol solution for 12 hours.
On the other hand, enormous number of anthocyanin natural dye has been utilized as dye sensitizer and among them pomegranate peel gives the best result as it mentioned earlier and its photovoltaic parameters are 0.39 V VOC; JSC 12.2 mA/cm2, FF 0.41 and ɳ% is 2 but blackberry and red Sicilian orange also exhibit good photovoltaic parameters in comparison to others anthocyanin pigments.
Haridas, Investigation of the Efficiency of Dye-Sensitized Solar Cell Using Natural Dyes as Photo Sensitizer, Journal of the American Institute of Chemists, Volume 89 Number 2 (2016)
Online since: March 2025
Authors: Minh Tuan Pham, Thanh Nam Nguyen, Khanh Dien Le, Trung Le Tran, Huu An Khang Dong
max. 0.04 0.10 - 2.0 - 0.75 - 0.045 - 0.030 18.0 20.0 - 8.0 10.5 - Mechanical Property Specification (single values are minima except as noted) Grade Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness Rockwell B (HR B) max Brinell (HB) max 304 515 205 40 92 201 304L 485 170 40 92 201 304H 515 205 40 92 201 304H also has a requirement for a grain size of ASTM No 7 or coarser.
Table 5 Simulation values of the influencing parameters Straight conical sample Stainless steel SS304 material Plate thickness w = 0,4mm Level of value Forming angle between stages Downward step of pestle Diameter of pestle Velocity of pestle Symbols (Dα) Dz D Vxy Units (0) (mm) (mm) (mm/min) Level Low 5 0.5 5 600 Medium 7.5 0.75 7.5 900 High 10 1 10 1200 In the research, Taguchi method was chosen to identify the a set of parameters affecting the formability (forming angle α) on SUS304 (JIS) sheet material with a sufficient number of experimental samples to ensure reliable results.
The number of revolutions of the pestle without slipping is depends on the tool diameter and feed rate.
Online since: September 2013
Authors: Joseph E. Edeh, Manasseh Joel, James Mzuaor Aburabul
Since RAP may be obtained from any number of old pavement sources, quality can vary.
The number of times the pavement has been resurfaced, the amount of patching and/or crack sealing, and the possible presence of prior seal coat applications will all have an influence on RAP composition.
The higher CBR values for soaked GSA stabilized RAP compared to the unsoaked conditions may be as a result of pozzolanic strength gain due to complete chemical process of hydration of the lime in the RAP + GSA mixes [19] while the higher CBR values for unsoaked GSA stabilized RAP compared to the soaked conditions may be attributed to the reaction between the hydrated lime with tricalcium aluminate and water to form tetracalcium aluminate hydrate which forms a protective coating on the surface of unhydrated grains of tricalcium aluminate, thus slowing down the rate of hydration of tricalcium aluminate to form the strength producing compound of tetracalcium aluminate hydrate [20].
Online since: October 2010
Authors: Bernd-Arno Behrens, Julian Knigge, Thomas Hagen, Andreas Klassen, Jens Mielke, Insa Pfeiffer
This and the breaking surface appearance of the tensile test specimen indicate a coarse-grained structure for these two test materials.
Table 4: Damage material parameters of aluminium alloys for the MES Material number EN AW: Rp0,2 [MPa] Rm,m [MPa] Ep,eq,Rm [%] D1C SD 5083 182 333 24.8 0.1286 2.4982 5754 99 237 31.1 0.2204 2.6423 2017A 375 504 14.7 0.0382 1.2990 6082 315 348 15.3 0.2459 3.3363 7075 608 657 10.1 0.0221 0.8207 For the calculation, the described relevant parameters were entered into the GUI of the used FE- software-system Simufact.forming SFM.
P.Joshi, et al.: On the Occurrence of Portevin-Le Châtelier Instabilities in Ultrafine-Grained 5083 Aluminum Alloys, in: Experimental Mechanics, Volume 49, Number 2, Springer Boston, USA, April 2009, pp. 207-218 [11] H.
Online since: December 2012
Authors: Hong Zhen Wang
Table 1 HF-32.5 early strength fast hard cement performance test results Cement setting / final setting stability (cake method) flexural strength MPa compressive strength MPa 1d 3d 28d 1d 3d 28d HF early strength fast hard cement 25 min/90 min qualified 4.0 5.5 5.8 28.7 35.3 43.2 Q/HF01-2006 25min≤/≤180min qualified ≥4.0 ≥5.0 ≥5.5 ≥26.0 ≥32.5 ≥38.0. 2.1.2 Ceramsite lightweight aggregate Optional sintering, sintering and expanding or unburned clay ceramsite and fly ash haydite.Aggregate gradation for nature, and requires the grain shape is good and reasonable gradation.Production of non-load-bearing insulation block, ceramic packing density of not more than 600kg / m3; if the production of bearing block, ceramic packing density is greater than 1200 kg / m3.For load-bearing brick, ceramic cylinder compressive strength shall not be less than 10MPa; non-load-bearing brick, ceramic cylinder compressive strength shall not be less than 4MPa.Water absorption rate should not be greater than 20%
(a) circular ceramic (b) elongated aggregate Fig 2 The Tianjin Wuqing Xuanyi light building materials factory production sintering-expanded haydite 2.1.3 Fiber reinforced Fiber is a kind of important reinforcing, toughening component, is mainly used to improve the concrete fracture toughness and crack resistance and seepage control performance.In lightweight aggregate porous concrete mixing a certain number of fibers, forming a three-dimensional network structure, not only can enhance, toughening effect, but also can effectively prevent the lightweight aggregate concrete surface, improve the stability of.This is because the organic fiber is very small, large specific surface area, adsorption amount of water need paste, so the amount of cementing material, sand rate unchanged, adding fiber to concrete viscosity increased.Thus adding fiber can effectively control the aggregate of the freedom movement, thus reduce the concrete segregation degree, improve the properties of concrete
Table 4 Test number Cement kg/m3 fly ash kg/m3 ceramisite kg/m3 dry density kg/m3 compressive strength Mpa dry shrinkage m/mm bubble rate % Coefficient of thermal conductivity w/mk S1 350 150 189 779 6.0 0.69 54 0.19 S2 320 120 210 702 3.5 0.53 53 0.18 S3 400 100 206 776 6.0 0.76 48 0.20 Production technology Ceramsite foam concrete block can use advanced technology to realize large-scale industrialized production.From raw materials processing, ceramsite foam concrete slurry preparation, group die casting molding, steam curing, cutting, stripping palletizing packaging curing process.In production to be solved in ceramsite up control, dry shrinkage and the volume stability control, impermeability and pouring and so on.
Online since: March 2014
Authors: Pragnesh N. Dave, Shalini Chaturvedi
., a grain of sand).
Energy efficiency products are increasing in number and kinds of application.
Nanoscience in Medical and Health Mankind is still fighting against a high number of serious and complex illnesses like cancer, cardiovascular diseases, multiple sclerosis, Alzheimer‟s and Parkinson‟s disease, and diabetes as well as different kinds of serious inflammatory or infectious diseases (e.g.
Online since: October 2008
Authors: R.M. Mohanty, K. Balasubramanian
The number of boron carbide reported till date along with volume of unit cell and the published references have been summarised in the Table 1.
So the scope of having a large number of structures and composition of boron carbide increases [30].
Apart from limitations, the current manufacturing process of B4C involves high expenditure of energy, lengthy processing time (~24 hours), poor process yield and production of carbide of large grain size.
Online since: August 2019
Authors: Camila e Silva Gomes, Nisia Krusche
Nevertheless, the model still leads to errors in power forecast, by comparison with the wind power measured at the aerogenerator. 1 Introduction Wind is a clean and inexhaustible source of energy which has been used for grinding grains, pumping water, moving sailing boats and carrying out several tasks for centuries.
The type used in the simulation was the one of the Four-Dimension Data Assimilation (FDDA) method applied to the first grade (3 km) so that border conditions that directly influence the second grade (1 km) can be led to data observed and, consequently, can decrease the number of errors made by the simulation (figure 2).
Determination of the height of this layer is based on the Richardson number (RIb).
Online since: November 2011
Authors: S.K. Nimo, F. Boakye, P.S. Kwawukume
To achieve insulating characteristics, some adjustment is usually done to the ratio of the size, number of pore spaces, and number of solid particles and the selection of a low conductive material to suit a given condition.
The raw materials were characterized using the chemical composition method and grain size analysis.
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