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Online since: December 2014
Authors: Elena Čižmárová, Mária Mihaliková
According to this analyse we can claim that by the time increasing up to fraction (lower starting tension) the grain yield points will be more intensive made their selves by the transgressing.
The KODUR 460MC steel has a fine-grained ferrite - pearlite structure with a low volume of the pearlite (about 8%) Fig. 2.
The ferritic grain size is about 8 mm.
At the Fig. 4 cracks were formatted along the grain borders and their growth (binding) was created after.
Number of the secondary cracks was increased step by step alike on the grain borders near the fraction are.
Online since: June 2003
Authors: Michio Kondo, Akihisa Matsuda, H. Fujiwara, Y. Nasuno
In these films, ds increases again rapidly due to a preferential growth of poly-Si grains.
In Fig. 4(b), we Fig. 2: (a) ds determined by SE and (b) integrated absorbance of SiHn complex in a-Si:H, plotted as a functions of dt. estimated Nd by counting the number of poly-Si grains that appear in the AFM image [14].
The stress generation by H and the following strained Si-Si bond formation occur successively and increase the compressive stress and the number of strained Si-Si bonds with increasing dt.
In the following deposition, columnar grain growth occurs, and ds gradually decreases [14].
In contrast, on the ZnO-coated SnO2, the textured structure prevents the poly-Si grain growth, and relatively large grain boundaries are generated.
Online since: December 2009
Authors: Dimitar Stavrev, Tsanka D. Dikova
Low-carbon package martensite occupies the regions of the former ferrite grains.
The martensite of this morphological type occupies whole regions of the former ferrite grains or it is placed near the graphite, forming compact cover.
The fine-grained highcarbon martensite is located in the quasi-eutectic regions around the cementite.
Low-carbon package martensite occupies the regions of the former ferrite grains.
It is characterized by a great number of imperfections and high mechanical properties.
Online since: February 2019
Authors: Hesham Hamad, Marwa Farouk El-Kady, Hassan Shokry
The increase in the monoclinic content and grain growth are caused by the calcination temperatures even calcination at 800°C.
ZrO2 nanoparticles are attracting increasing interest because of a number of key characteristics such as; excellent chemical resistance, refractory character, chemical inertness, good mechanical strength, relatively high thermal expansion coefficient, good thermal stability, high fracture toughness and hardness [1-7].
The shift in equilibrium of the hydrolysis, which changes the number of the hydroxyl ligands available for bridging, can easily be controlled by varying the pH of the solution.
Also , it is obtained pores structure and small grain size that appears by SEM micrographs which is very useful for catalytic applications [8,17] .
The agglomeration is increased which may be due to sintering , thus the crystals growth through coalescence –transformation the original agglomerate into single tetragonal grain (Fig.3-a).
Online since: April 2014
Authors: Klára Kroftová, Markéta Šmidtová
Currently there are a number of primarily preferred procedures that stabilize the structure of the external finish, yet at the same time preserve the original features of the historical plasters.
Experimental samples were made with the following composition: a) Gothic plaster (G) : 5kg air lime, 16 kg river sand (grain size 0-4 mm) , 4 liters of water b) Renaissance plaster (R) : 5kg of dry hydrated lime, 10 kg river sand (grain size 0-2 mm), 3 liters of water c) baroque plaster (B) : 5kg of dry hydrated lime, 12.5 kg of river sand (grain size 0-2 mm), 3.5 liters of water 2.3 APPLICATION Testing of the nanotextiles was done under laboratory conditions at 23°C and a humidity of 52 %.
Online since: November 2018
Authors: Alexanders Urbahs, Darja Andrejeva, Konstantins Savkovs, Margarita Urbaha
According to expert evaluations by the world’s leading tribology professionals, the application of existing results achieved in this field can reduce the number of machine failures by 25–30 %.
A number of experiments was carried out to obtain intermetallic, conglomerate and nitride coatings based on Ti–Cu with various physical and chemical composition [14, 15].
All the samples were numbered according to their location in the vacuum chamber (see Fig. 2) for the best recognition.
Surface of Obtained Coatings The grained structure was more typical of the intermetallic coatings (see Fig. 7) – the size of grains was on average 0.9 to 1.2 μm.
As particles cool quickly when hitting, the coatings obtained a fine-grained structure (see Fig. 8, b).
Online since: March 2019
Authors: Rudolf Kawalla, Madlen Ullmann, Ulrich Prahl, Thorsten Henseler, Matthias Schmidtchen, Kristina Kittner
But only a limited number of studies have been conducted on the hot compressive properties and processing maps of LPSO-containing Mg-Y-Zn-Zr alloy.
The contour numbers represent percent power dissipation efficiency and the shaded domains indicate the regions of flow instability.
Fig. 4 (c) does not exhibit any apparent banding instead it shows a coarse recrystallized grain structure.
The absence of shear banding in the microstructure may be due to covering of the as-deformed microstructural features by recrystallized grains with grain growth taking place after deformation.
Although the resulting microstructures in the DRX domains have different grain sizes, they have corrugated grain boundaries with some fine grains nucleating at the boundaries.
Online since: September 2013
Authors: Harshita Agrawal, A.G. Vedeshwar, Vibhav K. Saraswat
A uniform spherical grain size growth is clearly evident from SEM micrographs.
The most important feature of PbI2 is its large atomic number (ZPb=82, ZI=53), from which the detective efficiency is expected to be higher than that of the other detectors being used.
Uniform spherical grain size growth is clearly evident from SEM micrographs (figure 2).
The morphological analysis (SEM micrograph figure 2) indicates a progressive growth in grain size with film thickness.
Online since: August 2017
Authors: Pei Song Tang, Hai Feng Chen, Chun Yu Long, Min Min Jin, Fang Fang Peng
XRD and SEM demonstrated the successful synthesis of single phase TbMnO3 and an average grain size of 100 nm in diameter.
From Fig.3, it was easy to see that the average grain size at about 100 nm of.
There was a absorption peak at the wave numbers of 596 cm-1 which was caused by stretching vibration of Tb-O-Mn.
The average grain size of TbMnO3 samples was about 100 nm.
Online since: December 2012
Authors: Yong Liang Gao, Shu Qiang Yuan, Yan Lv, Wei Chen, Shi Lian Hu
As Fig.6 shown, the grains deformation and amount of twins are increasing with the strain rate.
It also can be seen from Fig.6(a), when the strain rate is 1S-1, deformation twins only appear in the original austenite grain and deformation twinning orientation are basically consistent.
This phenomenon shows that dislocation slipping and a small amount of deformation twins forming can coordinate the deformation at this time; From the Fig.6(b), when the strain rate is 10S-1, almost all austenite grain exist deformation twins and the deformation twins crossed with each other, which shows that more deformation twins and more slip systems involved in deformation process, in order to coordinate the plastic deformation; When the strain rate is 100S-1, large number of different orientations of deformation twins appear and cross with each other in the same grain zone as shown in Fig.6(c), this phenomenon shows that slip systems further increase and participate the deformation process in high strain rate deformation.
Through the deformation, the original grain and twins were splitted , then substructure were formed.
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