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Online since: February 2011
Authors: Zhen Feng Fan, Jin Liang Zhang, Xiao Lin Liu, Jin Kai Wang
As this zone suffered weathering erosion in a long time, it developed a large number of residual hills, with palaeogeomorphic characteristic that gully and beam alternate with each other.
The main sedimentary type was braided river in the lower member of Guantao Formation, and its sedimentary features were coarse grained, thick bedded, mudstone less developed and cycle positive.
While in the upper member of Guantao Formation, the meandering river was the main sedimentary type, and meanly developed meandering river, which sedimentary features were fine grained, thin bedded and mudstone more developed.
Massive clastic materials were deposited, when they reached the slope, and formed a large number of fan delta sand bodies at last.
Online since: July 2011
Authors: Zheng Liu, Xiao Mei Liu
Because the solubility of rare earths (RE) in Al alloy is very low[9], the solute redistribution in solidification can be richened at grain boundaries.
Fig.1 Microstructure of the Fig.2 Eutectic Si in the composite Fig.3 Eutectic structure in the composites without La composites As the refining effect of La on eutectic silicon [10], it is seen from the structure morphology of A356 with and without La that the number of eutectic silicon with stick-like or sheet-like obviously decreases with La adding to A356 alloy, and breaks into the non-regulated particles.
Due to no other elements with big atomic number added into the matrix except La in this test, and it is known from Al-La alloy phase diagram that La with Al can form into varied kinds of compounds [9].
In addition, La with larger atomic radius has the lower solubility in Al alloy, and it will richen at the grain boundaries by redistribution of solute during solidification [9].
Online since: October 2012
Authors: Chang Tian, Gang Chen, Cui Ling Wang
Fig.1 Stage reclamation strength stereogram Table 1 Earth-rock excavation plan below elevation 740 m of the overflow still basin and its outlet section Table 2 Progress schedule of dam reclamation Table 3 Allocation on coarse-grained rock material I Table 4 Allocation on coarse-grained rock material II 5.3 Analysis dam filling peak strength intensity In dam filling construction period, comprehensive highest intensity of is 0.8208 million m3 per month, it appears in the Ⅵ filling period during June 01, 2010~September 15, 2010.
We compare allocation planning in the tender stage, Increase a larger number of materials directly used on the dam and reduce the number of transfer material and the mining of material field.
Online since: October 2014
Authors: Sheng Jie Yang, Meng Jie Qin, Chao Chao Zhang, Xi Xi Huang, Feng Gao
Bi2O3 can be used to not only promote grain growth and densification of ceramic, but also affect oxygen partial pressure during sintering process.
As a kind of the sintering aid, Bi2O3 can be used to promote grain growth and densification of ceramics.
In the Sr3Ti2O7 crystal structure, the Sr2+ cation has two different positions in the lattice—one with the coordination number 12 (labeled as Sr1), is located in the octahedra stack, whereas the second position, with the coordination number 9 (labeled as Sr2), is located at the boundary between the octahedra stack and the rock salt SrO layer.
Online since: April 2016
Authors: Shi Guang Shang, Xin Li, Ling Zhao, Rui Lu, Hai Feng Chen
To improve these properties, a high surface area of the TiO2 nanoparticle film is essential, because it allows adsorption of sufficiently large number of gas molecules.
As shown in Fig. 3, with increasing calcination temperature the particle size increases and grain boundaries are clearly observed, which can be attributed to the thermally promoted crystallite growth.
The agglomerations with different morphologies composed of large number of small nanosized grains are generated with varying pH levels.
Online since: May 2014
Authors: Kwan Ho Kim, Chul Min Bae
Nevertheless, the authors reported recently that the cerium addition to 100Cr6 bearing steel is essential to reduce the segregation of alloying elements and the formation of large carbides during casting by refining equiaxed grains, resulting in the enhancement of rolling contact fatigue life of the steel [3].
As the soaking condition is related to the greatest grain diameter of the large carbide particles, and they are distributed having spaces that are sufficiently large as compared to their size, the condition to dissolve them will be attained by calculating the diffusion of Cr by soaking for the case in which one sphere containing Cr and having the largest size found among the large carbide particles is present in an infinite matrix.
Results and Discussion In order to confirm the compatibility of Eq. 4, a number of continuously cast blooms have been analyzed.
In fact, a number of continuously cast blooms over a hundred having different values of were analyzed for this study and there was no incorrectness of the new soaking condition determined by Eq. 4.
Online since: September 2013
Authors: O.U. Orie, E.O. Eze
Fig. 1 shows the grain size distribution of the shale while the dependence of the Atterberg limits and the plasticity index on the amount of cement added is shown in Fig 2.
Clays and shales used in a number of structural clay products are required to equally have a wide range of physical properties.
Bricks made of clay shale or similar earthy materials and subjected to a heat treatment sufficiently high to develop fired bonds between the grain constituents to provide the strength and durability requirements of bricks used for industrial floor [24], pedestrian and light traffic paving [25] and heavy vehicular paving [26].
Conclusion The study shows that the geotechnical and chemical properties of the clay shale compare well with those of shales used in a number of engineering constructions including such as foundation for road beds, bricks and other structural clay products, and pedestrian and heavy duty pavings.
Online since: December 2005
Authors: Feng Jiang Wang, Xin Ma, Yiyu Qian
This causes the development of new advanced packages that contain a higher number of interconnections on the same area than the standard packages of today, typically e.g.
The light-colored regions are pure β-Sn grains; they are surrounded by a gray eutectic network band.
The indentation sketch in Fig. 3 contains numbers of β-Sn grains and eutectic phases, which indicates that the maximum load of 300 mN is sufficient to obtain the global response instead of single phase response during indentation tests.
Online since: September 2016
Authors: N.K. Krioni, I.R. Kuzeev, A.D. Mingazhev
Plates with an average grain size of 6 μm were used as external workpiece layers.
Sheets with thickness of 0.8 mm, 1 mm with an average grain size of 0.6 µm, 1 µm, 2 µm were used as a primary workpiece of the filling material.
Technological defects Technology rupture of adhesion bonds The type and number of defects, [%] The deviation of the thickness of the filler The presence of microscopic "bridges" The presence of thin places in the bend zones of the filler Traditional [7] 42 38 46 Magnetic- striction [12] 16 14 12 The destruction of adhesive bonds was carried out in two ways..
As can be seen from the table the application of magnetic-striction method of adhesive bonds breaking can significantly reduce the number of technological defects in a laminated product.
Online since: June 2015
Authors: Abdul Rahman Tamuri, Nurul Syazlin Saharin, Husin Wagiran
For example, the TL of Al2O3:C consists of a peak at about 200°C, and a number of weaker intensity of secondary peaks below and above 200°C, whose relative intensity depends on the dosimeter's treatment such as irradiation or exposure to light [10,11].
Experimental Sample preparation In this work, a solid Al2O3: C sample supplied by Stanford material, USA with a diameter of 70 mm and thickness of 3 mm was crushed using aged mortar into powder with grain size of about 50 -100 mm.
Powder with grains sizes between 75 and 200 µm is good compromise to be used as TLD [6].
Acknowledgement The authors would like to thank to the Ministry of Education (MOE) of Malaysia for the financial support (Vote Number 03H28) and Universiti Teknologi Malaysia for providing research facilities.
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