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Online since: November 2025
Authors: Josef Duliškovič, Šárka Houdková, Žaneta Dlouhá, Jiří Frank, Hana Jirková
In these studies, the reduction in coating porosity after heat treatment is attributed to diffusion – driven mechanism or sintering mechanism, which enhance cohesive bonding between particles and thereby reduce the number of defects within the coating [6, 7, 8].
The recrystallization process may have caused the change of elongated grains to globular.
Stresses accompanied by this change in substrate grain shape explain the reduction of adhesion strength of the coating to the substrate at heat treatment temperatures of 600 °C and 800 °C.
In the case of the heat treatment at 1000 °C, the recrystallization process was followed by the coarsening of the substrate grain.
Online since: May 2012
Authors: Bing Hua Xia, Yuan Cai Liu, Wei Wei Sun
Table 1 Main parameters of cement Density (kg/m3) Cement fineness Compressive strength (Mpa) Flexural strength (Mpa) Setting time (min) Stability 3d 28d 3d 28d Initial setting Final setting 3070 2.34% 7.8 11.2 35.3 49.7 217 263 qualified (2) Fine aggregate Common sand which bulk density is 1678kg/m3, maximum grain size is 5mm and fineness modulus is 2.73
Table 2 Main parameters of haydite Bulk density (kg/m3) Apparent density (kg/m3) Porosity (%) Cylindrical compress strength (Mpa) 1h Water absorption (%) Grain composition Particle size coefficient 800 1470 45.6 8.5 8.8 5-16 continuous size fraction 1.1 (5) GRT fiber The main parameters is shown in Table 3.
Acknowledgements This work was financially supported by the Provincial Special Major Project of Forest Engineering (project number: 501035), the Experimental Teaching Center of Provincial Structural Engineering (project number: 501042), and the key Discipline Project of Forest Engineering in SWFU (project number: 47002801) References [1] Luoshu Gong.
Online since: June 2017
Authors: A.G. Barbosa de Lima, M.K. Teixeira de Brito, D.B. Teixeira de Almeida, L. Almeida Rocha, E. Santana de Lima, V.A. Barbosa de Oliveira
The analytical solution for this problem was first found in one dimension, and afterwards the one-dimensional solutions obtained for the x, y and z directions were multiplied, thus obtaining the three-dimensional solution as follows: (7) where, (8) (9) For obtain the eigenvalues , it was used the following mathematical relation, obtained by the boundary conditions at the surface of the solid: (10) in which n=1, 2,3... and, j=1, 2 and 3, and is the Biot number given by:
The deviation between the analytical and experimental results and the variance were obtained as follows: (17) (18) where n is the number of experimental points and the number of parameters fitted [22].
Hall, Drying and storage of grains and oilseeds, AVI Book, New York, 1992
Okos, Drying theories: their bases and limitations as applied to foods and grains, in: Mujumdar, A.
Online since: May 2015
Authors: Masanori Takeda, Akihira Miyachi, Takafumi Kojima, Yasunori Fujii, Yoshinori Uzawa, Matthias Kroug, Takashi Noguchi
Figure 3 shows the relationship between the number of preconditioning cuts and the horizontal chipping width.
The abrasive grain appeared to even out uniformly on the blade surface.
Dicing blades of the same series have similar abrasive grains, but the surface conditions are not the same.
Fig. 3 Relationship between number of preconditioning cuts and horizontal chipping width.
Although the total number of experimental samples was small (the 23 µm sample was excluded due to the limitation of the heat adhesive and polishing machine), we could polish samples to 40.4 and 58.8 µm when aiming for target values of 40 and 60 µm, respectively.
Online since: August 2010
Authors: Chun Nian Liu, Kun Zhou
Based on Service Oriented Architecture, the digital library platform allows the serving of coarse-grained services through the aggregation of fine-grained services offered by the different libraries.
Grid technology can make a processing and analysis for information and data in digital library service, which provides scientific foundation and decision for the library information service from a large number of valuable internet information and documents.
When better serving people, it is important to take into consideration the growing number of available digital libraries, the necessity to adopt advanced information technology in the digital library service.
Still, there are a number of issues on technology implementation waiting for further research including research methodology, information security, privacy, etc.
Online since: September 2018
Authors: Cristiano Stefano Mucsi, EVANDRO GIUSEPPE BETINI, Marcos Tadeu D'azeredo Orlando, Temístocles de Souza Luz, Maurilio Pereira Gomes, J.L. Rossi
The weldability of modern duplex stainless steel is satisfactory, although the heat affected zone and weld metal generally exhibit higher ferrite content and coarser grains than the original material.
During welding the austenite dissolves while been heated, it followed by grain growth in the delta ferrite region, and finally restoring to the austenitic phase during cooling [2,3].
First, for Figure 2 (a) the thermocouples number 1 (8 mm distant from the melting pool) and number 4 (10.5 mm) were placed closer to the weld bead where the temperatures were near to 360 °C and 350 °C, respectively.
Furthermore, the curves for thermocouples numbers 2 and 5 (distance of 13 mm) exhibits very close values for the temperature peaks since they were symmetric placed from the center of weld bead.
Online since: April 2020
Authors: Ika Dewi Ana, Erlina Sih Mahanani, Indra Bachtiar
The number of cells attached to the scaffold was carried out using the dye exclusion method, namely by removing the cells attached to the scaffold using trypsin EDTA and then doing a cell count.
The synthetic coral scaffold also uses melting grains of ice which then the ice is removed by vacuum using freeze-drying.
The synthetic coral scaffold also uses melting grains of ice which then the ice is removed by vacuum using freeze-drying.
This reduces the surface area so that the number of cells is attached to the well base.
However, the size of the porosity that is too large will reduce the number of cell attachments.
Online since: September 2015
Authors: Theodor Staněk, Petr Sulovský
The large number of binders to be tested led to choosing toxic elements representative of the main groups of toxic elements: cations-forming Cd, Ni (true “heavy metals”), Pb and Zn (amphoteric heavy metals) and anions-forming metals and metalloids (Cr, V, As).
Collaterally, the same number of test bodies was prepared for determination of the contents of studied elements in dry matter by ICP-OES and for determination of toxic elements leachability by the batch method.
elements B80S0 - high belite clinker, not doped with foreign elements Cements from clinkers doped with P2O5 AP1 (cement from alite clinker with 1% P2O5) AP2 (cement from alite clinker with 2% P2O5) CAC 70% + AP1.5 30% (alite clinker with 1.5% P2O5) AP7/MKM (alite clinker with 7% P2O5 as granules of MBM ash) Cements with addition MBM ash CEM I 52.5N (90%) + MBM ash (10%) White CEM I (90%) + MBM ash (10%) CAC (95%) + MBM ash (5%) CAC (90%) + MBM ash (10%) CEM I 52,5N (50%) + CAC (40%) + MBM ash (10%) Cements with addition of diatomite CAC (80%) + calcined diatomite (20%) CEM I 52.5N (75%) + raw diatomite (20%) + MBM ash (5%) CEM I 52.5N (80%) + raw diatomite (20%) CAC (75%) + calcined diatomite (20%) + MBM ash (5%) CAC (80%) + raw diatomite (20%) CAC (75%) + raw diatomite (20%) + MBM ash (5%) CEM I 52.5N (70%) + CAC (10%) + raw diatomite (20%) Clinkers doped with SO3 B89S5, B83S8, A92S8, B90S6MA2.5 – cements made from clinkers doped with SO3, those do not contain yeelemite (numbers
Arsenic was dispersed in the hydrated binder matrix relatively homogenously, with moderately increased concentrations observable around grains of MBM ash as well as relict CA clinker grains (cf. 
Online since: October 2015
Authors: Saeed Farahany, Tuty Asma Abu Bakar, Nur Azmah Nordin, Esah Hamzah
The coarse sample appeared to be eutectic cell grains or boundary, and the finer flake-like eutectic is inside the cell.
In addition, decreases in eutectic size caused the number of eutectic cells that appeared to increase.
In addition, it was noted that number of particles formed increased with the amount of additive Ce, and the amount of 0.8wt% resulted in the highest number of particles nucleated, from 12 in base composite to 45 particles per unit mm2.
Theoretically, eutectic cells act as eutectic grains, and more cells with smaller size result in more eutectic boundaries.
Online since: June 2011
Authors: Robert E. Hackenberg, Heather M. Volz, Pallas A. Papin, Ann M. Kelly, Robert T. Forsyth, Tim J. Tucker, Kester D. Clarke
(1) In Eq. 1, zs and Z are coordination numbers at the interface and in the bulk, respectively, which were set equal to one another.
No is Avogadro’s number and C is the regular solution constant for the g phase (estimated as C=2RTc, where R is the gas constant and Tc = 977ºC = 1250K [22].)
The number of atoms per unit area ns was taken as the average of those calculated for the likely habit planes of (111)g || (200)a [23].
Both the DP and DC initiated at prior g grain boundaries and U(C,N) inclusions.
An n value of 1 is expected for DP reactions initiating at grain boundaries with site saturation [24]; higher values are expected once the effect of initiation at U(C,N) inclusions is considered [4].
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