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Online since: May 2011
Authors: Bai Yang Lou, Xiao Li, Xiao Dong He, Li Ma
In order to obtain the electrical steel with homogeneous silicon distribution and small grain size, the electrical steel was processed by high temperature rapid thermal annealing.
Table 1 Fe configurations of the electrical steel Fe sites Number of Si atoms in the nearest neighbor shell Number of Si atoms in the next nearest neighbor shell Ⅰ 0 0 Ⅱ 0 1-2-3-4-5-6 Ⅲ 1 0-1-2-3-4-5-6 Ⅳ 2 0-1-2-3-4-5-6 Ⅴ 3 0-1-2-3-4-5-6 Ⅵ 4 0-1-2-3-4-5-6 Table 2 Mössbauer parameters of as-prepared, as-annealed and as-rolled samples Samples Assigned subspectrum Δ[mm/s] △[mm/s] H [Koe] Γ [mm/s] Area ratio [%] As-prepared Ⅰ 0.04 0.06 333 0.14 12.6 Ⅱ 0.04 0.00 319 0.22 38.2 Ⅲ 0.06 -0.02 302 0.20 13 Ⅳ 0.09 -0.00 284 0.20 16.6 Ⅴ 0.21 0.02 249 0.20 14.2 Ⅵ 0.29 -0.05 196 0.20 5.4 As-annealed Ⅰ 0.08 0.02 330 0.19 14.1 Ⅱ 0.06 -0.00 317 0.21 34.2 Ⅲ 0.02 -0.00 299 0.20 14 Ⅳ 0.11 -0.00 281 0.20 21.2 Ⅴ 0.18 -0.00 240 0.20 16.5 As-rolled Ⅰ 0.06 0.10 330 0.19 15.2 Ⅱ 0.06 0.00 316 0.21 32.9 Ⅲ 0.03 -0.01 297 0.20 15.1 Ⅳ 0.10 -0.02 279 0.20 22.1 Ⅴ 0.19 -0.00 239 0.20 14.7 Table 3 The measured values of Fe site occupancies of the samples and theoretic results for random, B2 and DO3 at 13 at
Online since: April 2007
Authors: Xiao Ning Zhang, Fan Yong Ran, Yan Hong Li, Wen Bin Cao
Both the grain sizes of the N-doped and non-doped TiO2 powders were about 20 nm and 11 nm respectively by Scherrer's method.
It indicates that the number of bacterial plagues decreases quickly with the elapsing of time.
The grant number is 50472094.
Online since: January 2012
Authors: T.D. Mercy, Rahul Sharma, V.F. Kaladharan, K.P. Kamalakaran, S. Aravamuthan, G. Balachander
Table-1 Brinell hardness values Positions on the bottom of extruded can (Fig.5) Brinell hardness number Required Brinell hardness number A1 55 40 A2 54 A3 52 A4 54 The hardness values show that uniform properties have been achieved throughout the bottom of the can and confirm to the required temper condition. 3.2 Tensile Properties: Extruded cell-can has been cut and standard tensile samples were fabricated as per the standard ASTM B-557 for tensile property evaluation.
Figure 6 shows the optical photomicrograph which reveals the stretched grains and precipitate of Al6 (MnFe).
Online since: January 2013
Authors: Rui Cao, Ji Zhang, Sheng Li, Chun Lei Zhu
This study conducted a number of tensile tests of a cast TiAl alloy with directional lamellar microstructure to statistically examine the strength retention and ductility undulation.
In principle, those mis-oriented lamellar colonies are transformed from the equiaxed a grains that precipitate during final solidification due to not yet well optimized heat radiation condition.
Acknowledgements This study was financially supported by National Basic Research Program of China (973 Program contract number 2011CB605503) sponsored by the Ministry of Science and Technology of China.
Online since: October 2014
Authors: Jana Kukutschová, Darja Kubečková, Veronika Kučeriková, Hana Doležalová
Table 1: The residential panel housing and type of biotic attack Description of apartment house and the number of sample The thickness of the insulating ETICS [mm] The orientation of the external walls for sampling Biotic attack – a genus of microorganism Algae Clorophycae Cyanobacterium Chroococcidiops Fungal spores Alternaria Fungal tyfy (without detecting) Apartment buildings B1-B4 Locality A 1-5 100 The north wall x - - - 6-10 100 The west wall x x - - Apartment buildings B5-B8 Locality B 11-15 120 The north wall x x x x 16-20 120 The south wall x - - - Apartment buildings B9-B12 Locality C 21-25 120 The north wall x x x x 26-30 100 The west wall x x x x 31-35 100 The south wall x x x - Apartment buildings B13-B16 Locality D 36-40 100 The north wall x x x x Apartment buildings B17-B20 Locality E 41-45 100 The north wall x - x x 46-50 100 The west wall x x x x Northwest West East North Southeast South Southwest Northeast Figure 1 and
Results and discussion Although it is a relatively small sample of sites and the number of prefabricated apartment buildings, that the issue of the biotic infestation of the facades of the outer walls of prefabricated houses is closely related to the phenomena of building physics [8], so how to declare the results of the foreign studies.
For example, if we are going to characterize the genus Rotifers (Rotifera), so this is about a tribe of invertebrates animal that lives in the wild in the open water of plankton in lakes and ponds, in waters polluted, in moist soil, drying moss, between the grains of sand, it is also in mine shafts; females and males live separately or create colonies [9].
Online since: June 2014
Authors: R. Muccillo, Robson L. Grosso, Eliana Navarro Santos Muccillo, M.D. Gonçalves
Introduction Dense ceramics with optimized properties are required for a number of applications.
The spray pyrolysis is a powerful technique for the synthesis of complex oxides with submicrometer grain size and homogeneous shape [4].
This technique has been currently used to synthesize a number of ceramic compositions [6-9].
Online since: June 2014
Authors: Li Tie Zhang, Hai Bo Ji, Xiao Xu Wang
Table 1 The size attribute, Material properties and boundary conditions parameter numerical value diameter 740mm leaf number 3 boss ratio 0.2 Experiments using reverse engineering technology to obtain the 3-d model of propeller and Pro/E software have been painting of flow unit model.
The wireframe is shown in Fig.1.At the grain roof caving in order to establish the space rectangular coordinate system origin of coordinates, XY plane parallel to the propeller circular cross section, the flow direction is the Z axis positive direction.
Its kinetic energy and dissipation rate transport equation are: (1) (2) Among them, is caused by turbulent kinetic energy of the average velocity gradient, is caused by turbulent kinetic energy of the buoyancy,is compressible turbulent flow pulsation expansion effects on total dissipation rate, , , , , are empirical constants, , are the turbulent kinetic energy and the turbulent dissipation rate corresponding to the prandtl number.
Online since: November 2011
Authors: Ming Yan, Yan Lin Chen, Ying Chang, Jiu Xin Jiang
At 800℃ and 900℃, the specific mass grains of A and B are relatively small, curve (a) and curve (d) coincided, curve (b) and curve (e) coincided.
Fig. 1 Weight gain per unit area as a function of number of cycles for A and B cyclically oxidized, (a)A800℃, (b)A900℃, (c)A1000℃, (d)B800℃, (e)B900℃, (f)B1000℃ Fig. 2 The corresponding weight gains squared as a function of numbers of cycles for A and B, (a)A800℃, (b)A900℃, (c)A1000℃, (d)B800℃, (e)B900℃, (f)B1000℃ Phase composition and microstructure of oxide product.
Online since: August 2009
Authors: A.A. Andrushevich, N.K. Tolochko, Yu.A. Shienok
That is why only limited number of alloys (such as Al-Si-Mg systems an others) having a wide solidus - liquidus range is used in these methods [6].
As a result, due to limited number of materials used in conventional semisolid casting it is impossible to vary their properties over a wide range.
Therefore, it is rather difficult to create the ingot with required fine-grained structure.
Online since: June 2005
Authors: Bo Young Hur, Ho Seob Kim, Eun Ah Lee, Soo Wohn Lee, Huang Chen, Tae Ho Kim, Jae Heyg Shin, Ho Sung Aum
Since Fujishima first discovered the photooxidation of water by TiO2 electrodes [1], a large number of applications of TiO2 in photocatalytic technology have been developed [2].
Compared with the 90%TiO2-10%CeO2 coating and the 90%TiO2-10%SnO2 coating, many grains on the surface of the 90%TiO2-10%ZnO coating has grown up to 100nm as can be seen from Fig. 2a.
It was reported that TiO2 photoactivity was proportional to the number of hydroxyl groups on its surface [5].
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