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Online since: March 2013
Authors: Rasoul Nowrouzi, Fatemeh Razi Astaraei, Shima Kashani, Azam Iraji Zad
At lower temperatures, H2S gas can reduce the surface by reacting with ionosorbed oxygens on WO3 grains when a catalyst exists on the surface.
The coexistence of two oxidation numbers of copper (+2, +1) in the samples may be due to an increase in the degree of oxidation of Cu in Cu2O through the annealing process.
Online since: July 2015
Authors: Meena Laad, Vijaykumar S. Jatti, Satyendra Yadav
First, rice husk was sieved using a mesh (size 300 microns) to remove the impurities such as dust, broken rice grains etc.
Figure 2 Micro-Vickers hardness numbers Figure 3 Ultimate tensile strength of composites Tensile tests were carried out using computerized uni-axial tensile testing machine as per ASTM standards.
Online since: August 2016
Authors: Tobias Czotscher
Especially, when forming perforated aluminium sheets in micro scale, only a limited number of studies on their formability have been conducted.
Micro formed materials cause higher scattering of the material properties due to so called size effects like a lower amount of grains compared to macro scale [5].
Online since: October 2023
Authors: Heba Ghazal, Nadia Ramroop
As the world population grows, the number of antimicrobials prescribed and used has also increased.
Biochar is highly porous, fine-grained, light in weight, and has a large surface area.
Online since: September 2016
Authors: V.S. Tsepelev, G.V. Tiagunov, Andrey Tiagunov
Then to create nano-crystalline structure amorphous ribbons are annealed, which should ensure an emergence of a large number of crystallization centers while maintaining a low speed of forming crystals.
At this, clusters are potential centers of nucleation and the inter-cluster amorphous space prevents the growth of emerging grains which subsequently is a preferable condition to create nanocrystalline structure.
Online since: August 2009
Authors: Jian Li Song, Shou Jing Luo, Wei Wei Wang, Fei Han
A great numbers of practices have proved that FEM simulation is helpful for the mastering of the forming process [7,8], predicting and eliminating forming defects [9], optimizing process parameters and die structures [10,11] and ensuring the successful forming.
The growing of the grains during forging process must be prevented to ensure the high mechanical properties in commission.
Online since: February 2019
Authors: V.P. Gulyaev, P.P. Petrov
This pattern, revealed by multiple X-ray sampling of samples, has become 08 sk steel for a number of years, indicating the preservation of the physical state of the crystal structure (substructural properties) of steel 08 sk produced by such stresses, regardless of the duration of loading.
A noticeable increase in the values of FWHM of aluminum AD 1 at the same stresses s = 0.3s0.2 and s = 0.8 ... 0.9s0.2, as in structural steel 08 sk gives grounds to note the similarity of the processes of the occurrence of elementary acts of microplastic deformation in hexagonal and volume - centered crystal structures at comparable grain sizes (Fig. 4 and 5).
Online since: February 2019
Authors: G. Dukhovny, S. Zolotykh, A. Bodyakov
A large number of studies are devoted to the development of effective solutions for increasing the service life of the subgrade and relevant structures. [3-8].
Zhi, Effect of repeated freeze-thaw cycles on the resilient modulus for fine-grained subgrade soils with low plasticity index, Road Materials and Pavement Design. 19(4), (2018) 898-911
Online since: August 2013
Authors: M. Khairul Zaimy Abd Ghani, Anika Zafiah Mohd Rus, Najibah A. Latif
Solid foam granulate of approximately 10mm X 10mm X 10mm cube size was grained using rotor mill to form smaller particles, of 6 mm, 2 mm and 0.50 mm.
The vibration test was measured by using Dynamic Portable Data Logger (Dewetron model number 24070037) and was performed according to ASTM C4728 standard test method for random vibration testing.
Online since: August 2015
Authors: Supree Pinitsoontorn, Prinya Chindaprasirt, Pongsak Jittabut
When fine pozzolan a particles are dispersed in the OPC, they generate a large number of nucleation sites for the precipitation of the hydration products resulting in better distribution of fine pores which produces a homogeneous, dense microstructure.
In addition, denser packing within the cement results from the fine grains and reduces the wall effect in the transition zone between the paste and aggregate.
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