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Online since: January 2020
Authors: N.P. Lukutsova, R.A. Efremochkin, S.N. Golovin
Having such a mechanism of ensuring the system stability, it should be taken into account that the surfactant in the suspension composition is likely to be insufficient to stabilize the system, and it is necessary to introduce it in greater numbers (Table 1).
The dependence of the suspension ζ-potential and fine-grained concrete strength on the introduction sequence of the suspension components and the ultrasonic dispersion time № p/p Introduction sequence of the suspension components and the ultrasonic dispersion time ζ- potential [mV] Compressive strength of fine-grained concrete in 28 days of hardening [Mpa] 1 TiO2 + S-3 (8 min USD) +27.4 39.2 2 TiO2 (1 min USD) + S-3 (7 min USD) +27.5 39.3 3 TiO2(3 min USD) + S-3 (5 min USD) -30.1 42.9 4 TiO2(5 min USD) + S-3 (3 min USD) -31.4 43.8 5 TiO2+ 1/2S-3 (4 min USD)+1/2S-3 (4 min USD) -35.6 53.6 6 TiO2(7 min USD) + S-3 (1 min USD) +24.7 32.7 7 S-3 (1 min USD) + TiO2 (7 min USD) -21.1 33.8 8 S-3 (3 min USD) + TiO2 (5 min USD) -25.8 38.2 9 S-3 (5 min USD) + TiO2 (3 min USD) -23.4 36.6 10 S-3 (7 min USD) + TiO2 (1 min USD) -24.8 36.5 The given results are conformed to the strength parameters of fine concrete, molded with the suspension of titanium dioxide of anatase modification.
Online since: January 2013
Authors: Juan Li, Ya Jin Yang, Chun Ying Zhou
Besides, the Ba2+ easily concentrated on crystal boundary, and then defects were produced to prevent crystal grain growth.
Ultimately the size of grains were sufficiently small, and the transformation from β-C2S→γ-C2S did not occur [12], meanwhile the hydraulic reactivity of β-C2S was enhanced.
In addition, a number of crystals of hexagonal plate were found in clinker doped with BaO, and the crystal size ranged uniformly between 1 and 4μm, demonstrating that formation of was accelerated.
Online since: April 2014
Authors: Fan Yan Meng, W.Y. Chu, X.Q. Ma, Lie Jie Qiao, D. Li
The propagation of cracks along the grain boundaries (GBs) [17] and interaction between the microstructure and corrosion environment [18] in alloys have been studied.
The single crystal includes at total of 112665 atoms and the number of atoms of the twin crystal is 104668.
The twin boundary separate the sample into two parts: one part is the original grain orientation; the other part is the mirror image of this part in the (112) twin plane.
Online since: June 2015
Authors: Valmir José da Silva, Lisiane Navarro de Lima Santana, Wherllyson Patrício Gonçalves, Romualdo Rodrigues Menezes, Josileido Gomes, Hélio de Lucena Lira, Gelmires de Araújo Neves
According to the authors, at 1150oC occurred the nucleation of the mullite grains, but with an increase of 200oC in the temperature, an intensification of the peaks of this phase was observed.
The number of phases present in the samples was also determined.
The morphological analysis by scanning electron microscopy revealed nail-shaped crystal agglomerates, characteristics of mullite, besides round grains, typical of corundum.
Online since: August 2022
Authors: Zahraa S. Alshaikhli, Nor Azizah Parmin, Evan T. Salim, Sarmad Fawzi Hamza Alhasan
Cu2O as a solar and photovoltaic promising material has the potential to carry out a large number of studies due to its positive qualities of ease of cost-effectiveness, fabrication, high values of the absorption coefficient at the range of visible light, and finally the low values of the emissions [4-7].
Furthermore, various parameters like a size of grains and the surface shape, as well as the chemistry of the surface of copper oxide nanostructures, impact the optical current values of photo detectors.
Zang, Efficiency enhancement of ZnO/Cu2O solar cells with well oriented and micrometer grain sized Cu2O films, Applied Physics Letters 112.4 (2018): 042106
Online since: March 2014
Authors: Jim C. Newman Junior, Chun H. Wang, Kevin Walker
That particular alloy has a very coarse microstructure (average grain size 1.2 mm) [14] and it produces very rough and tortuous crack surfaces.
Pop/Pmax As per Eq 10b in [18], the crack driving force, U, is given by: (4) Where is the crack driving force arising from pure plasticity closure only Test results from Specimen number 1B [15] were used to develop the model.
[15] Walker, K.F., and Newman, J.C., Jr., A new approach to determine near-threshold fatigue crack growth rate properties in high strength coarse-grain titanium alloy with rough and torturous fatigue surfaces, in 27th ICAF Symposium. 2013: Jerusalem, Israel
Online since: December 2005
Authors: Toshiya Shibayanagi, Masakatsu Maeda, Kazuyuki Tenyama, Masaaki Naka
The first point is that TiAl2 is formed as a layer of acicular grains.
Ti-68.0at%Al corresponds to the composition of acicular grains of TiAl2 formed at 1673 K.
The circles with numbers indicate the binary and/or ternary phase equilibria on the reaction path.
Online since: April 2018
Authors: Marius Adrian Constantin, Ana Boşneag, Cristian Ciucă, Eduard Laurentiu Nitu
On the other side, for Exp. 2.4, the big welding speed has a bad influence, because it has an increased number of defects in FSW weld.
The distribution between these materials, in TMAZ zone, has an obvious boundary, with a space between this two materials, and the shape of grains started to be modified along of flow direction.
The grain of aluminum alloy, in the affected area, was refined and the shape of this was modified.
Online since: September 2019
Authors: Dr. Nagih Shaalan, Mohsen A. Hassan, Oboso P. Benard, Nakamura Koichi, Atef E. Mahmoud
Piezocomposites are composed of piezoceramic phase in form of pillars or grains and a passive or active polymer matrix.
The effective electroelastic properties of the composite are derived by considering a sufficiently large domain of the composite with a given number of inclusions.
Venkatesh, “Electromechanical response of piezoelectric composites: Effects of geometric connectivity and grain size,” Acta Mater., vol. 56, no. 15, pp. 3810–3823, 2008
Online since: May 2019
Authors: Rihendra Dantes Kadek
Because of the existence of alkaline reinforcement on the fiber it will remove a number of waxes, lignin and oil on the surface of the wall, depolymerization of cellulose occurs and makes the fibers shorter [15,16].
It is because the specimen fracture are fine grains on the surface of the specimen.
There are fine grains on the surface of the specimen.Coarse fibers like brushes on the fracture surface appear.
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