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Online since: August 2018
Authors: Shu Wang Duo, Wen Li Li, Xue Yan Yuan, Xing Yu Jiang, Hao Shuang Wu, Wei Min, Zhong Chen, S.Z. Wang, Xiao Xuan Wang
The capping of L-cys increased the grain size of ZnS:F QDs and their water solubility.
The reason could be that the number of the surface dangling bond of ZnS:F QDs reduced after capping with L-cys, which improved their luminescence.
Online since: January 2017
Authors: Mario Rosso, Ildiko Peter, Christian Castella
Because of this process, there are a number of possible advantages, including high process control, dimensional constancy in produced parts, low porosity and capacity to develop parts with complex geometries, good surface finishing properties and production of near-net-shape parts.
Figure 11: Optical micrographs of an A356 aluminium alloys poured at different temperature [46] Figure 12 illustrates the effect of the pouring temperature on the grain diameter and the shape factor of the semi-solid A380 aluminium alloy slurry, prepared by Serpentine Channel Pouring (SCP) process [51].
Figure 12: Curves of grain diameter and shape factor vs. pouring temperature of semi-solid slurry [51] 3.6.
The complex forging process, the large-scale equipment and the large number of mechanical processes make forging very expensive.
Fragner; The effect of chemical grain refinement and low superheat pouring on the structure of NRC castings of aluminium alloy Al–7Si–0.4Mg; Materials Science and Engineering A 420 (2006) pp.135–143
Online since: December 2023
Authors: Akihisa Inoue, Fan Li Kong, Xu Guang Zhu, Kuan Gao
At present, BMGs have been formed in a large number of multicomponent alloy systems where the empirical three component rule is satisfied.
Their BMGs have also been used on a huge number of pieces in various kinds of electronic-magnetic instruments.
In addition to the Zr-Al-Ni-Cu base alloys, we know a number of BMGs in various multicomponent systems such as (Ti, Zr or Hf)-Ni-Cu [16], Zr-Ti-Ni-Cu-Be [17], Ti-Zr-Ni-Cu-Sn [2] and Pd-Cu-Ni-P [18].
The nanocrystalline structure consists of bcc and residual amorphous phase and the bcc grain size is about 10-17 nm and disperses homogeneously.
Online since: April 2020
Authors: Nurul Fitriyah, Ten Her Hong, Ha Thai Duy, Juinn Wei Mi, Yen Fu Hsiao, Jenh Yih Juang
As the growth temperature increased, the film morphology evidently underwent drastic changes, from needlelike to more equiaxed grain morphology.
Perhaps it is worthwhile to mention that for the films grown at 520 °C with different deposition times, one is immediately able to see that, although the grain structure remains similar, the crystalline quality is much better for the one with longer deposition time, in support to the conjectures mentioned previously.
In the case of the film deposition on flexible muscovite substrate, the grain layer is clearly not a mixture constraint, there is no lattice mismatch between films, and substrate due to this kind of substrate is 2D material.
The resistance value has a high range number up to 102 Ohm, it confirmed that the substrate behavior was insulating material.
Online since: August 2019
Authors: Milan Brandt, Dong Qiu, Muhammad Musaddique Ali Rafique
Solidification techniques aimed at grain refinement and tuning of the microstructure are proposed to be the best possible solution strategy.
Any glass forming system consists of elements which must: 1. be three in number (at minimum).
The metal following it is usually found in the form of solidified fine equiaxed grains.
Research Opportunities In the present research, an effort has been made to microstructurally control and tune the properties of Zr-based BMGs by controlling the number density (dc) of a ductile primary phase CuZr-B2 spheroidal intermetallic, its grain size and dispersion within the bulk alloy by conventional and additive manufacturing routes.
Solidification techniques aimed at improvement of microstructure and grain refinement are proposed to be the best possible answers.
Online since: September 2013
Authors: Vivekanand Kain, B. Sunil Kumar
The microstructure of 10 h aged specimen showed secondary precipitates at ferrite-ferrite and ferrite-austenite grain boundaries (Fig. 1c).
For the specimen aged for 30 min, the number of current peaks was increased (Fig. 4b).
As the duration of aging increased from 30 min to 10 h, the number of anodic current peaks further increased, as is shown in Fig. 4b and 4c respectively.
But the number of current peaks observed for the 48 h aged specimen (Fig. 4d) was less than the 30 min and 10 h aged specimens.
This shows that the local dissolution at the sites of active spots increased with duration of the aging up to 10 h and yielded more number of meta stable pitting events.
Online since: September 2013
Authors: Hafid Hafid
The best casting induction furnace achieved at temperature 1,620oC as for to the number of ceramic mould coat which is good to be obtained at 7 layers.
In addition, PLN (State Electricity Company) Indonesia also needs a large number of turbines, about 8,000 units/year.
Making ceramic mold This was done by layering or coating cluster with ceramic slurry; after being drained a moment, the cluster layered with slurry was spangled with zircon grains so that the whole cluster was covered with zircon.
As a consequence, a ceramic with smaller number of layers has a higher possibility to be cracked.
Optimum number of ceramic layers is 7. 6.
Online since: January 2012
Authors: Hui Luo, Rui Xiong Hu, Ai Dong Liu
Economic phenomena with numbers, weight and measure, inferences from the rent value of the house, the projected population by the value of wages, earnings release based on population size and national wealth.
In the industry, the more the smaller the number of firms farther from the optimal level, the greater the larger the scale closer to optimal levels.
(N is the number of group, m for the two group numbers, ).
If a Group 1, two Group 1, according to the number of possible relationship between the number of groups is ,it has to increase the relationship between a group of people increased number (n is the number of groups).
Meanwhile the wave of the software company also has a China Aerospace Science and Technology, China South Industries Group, China Grain Reserves Corporation, China Shipping Group and other large groups of hundreds of enterprise customers.
Online since: May 2020
Authors: Axel von der Weth, Kaori Nagatou, Dmitri Klimenko, Marvin Schulz, Frederik Arbeiter, Volker Pasler
Omitting hydrogen loss of the specimen during pumping interval yields: 0= 2Vc-Vsa R T pr2+ VSks,sa pr - 2Vc-Vsa R T pstart2+ VSks,sa pload (3) Eq. 3 contains with the first summand the number of hydrogen atoms in the gas phase, second summand represents the number of atoms contained in the specimen after release, third summand stands for the number of atoms in the gaseous phase after pumping and fourth summand for number of atoms in interstitial after loading time interval.
Note the element number is used as abscissa here, see also Fig. 5.
As abscissa is the element number used as in Fig. 4, the diagram contains the number of used elements.
Caused by the elevated operating temperature (grain coarsening) the authors would prefer a powder metallurgic Al2O3 Cu alloy from Glid Cop corporation [11]) Fig. 4 and 5 demonstrate the simulation results on how the concentration is changing during all phases of the TDE.
At the end falling lines (element number 1 and 150) in the right upper graphics, detail (d) and (e), are indicating that the specimen has lost some hydrogen by pumping.
Online since: September 2014
Authors: Elisabetta Ceretti, Claudio Giardini, Luca Giorleo
The main advantage of workpieces produced by ring rolling, compared to other technological processes, is given by the size and orientation of grains, especially on the worked surface which give to the final product excellent mechanical properties.
Moreover, due to the nature of the process, it is possible to reduce the number of elements, and so the computational time, by considering a symmetric model.
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