Effect of Ga Addition on Morphology and Recovery of Primary Si During Al–Si Alloy Solidification Refining

2015 ◽  
Vol 34 (8) ◽  
Author(s):  
Jingwei Li ◽  
Xiaolong Bai ◽  
Yanlei Li ◽  
Boyuan Ban ◽  
Jian Chen
Keyword(s):  
Recovery Rate ◽  
Plate Thickness ◽  
Refining Process ◽  
Alloy Solidification ◽  
Solvent Refining ◽  
Plate Length ◽  
Primary Si ◽  
Ga Content

AbstractThe effect of Ga addition on alloy macrostructure, morphology and recovery rate of primary Si during the Al–Si–Ga alloy solvent refining process of silicon was studied in this work. The addition of Ga to Al–Si alloy could change the morphology of the primary Si. The average plate thickness of the primary Si increases with increase of Ga content. With the increase of Ga content, the average plate length of the primary Si crystals becomes larger when the Ga content is less than 5% in the Al–30%Si–

Thermal Stresses in Moderately Thick Elastic Plates

1959 ◽  
Vol 26 (3) ◽  
pp. 432-436
Author(s):  
B. E. Gatewood
Keyword(s):  
Temperature Gradient ◽  
Plane Stress ◽  
Thermal Stresses ◽  
Plate Thickness ◽  
Three Dimensional ◽  
Elastic Plates ◽  
Plate Length ◽  
Moderately Thick Plates ◽  
Thick Elastic Plates ◽  
Thickness Variable

Abstract The three-dimensional stresses in the plate are investigated without using the plane-stress or plane-strain assumptions, the thickness of the plate being limited so that the normal stress in the thickness direction can be taken as a polynomial in the thickness variable. The temperature is taken as a polynomial in the thickness variable but with relatively large, though restricted, gradients with respect to the co-ordinates of the plane of the plate. For the case of the temperature constant in thickness variable, the stresses in the plane of the plate are presented as the plane-stress solution plus correcting terms due to the plate thickness, where the correcting terms involve the product of the temperature gradient and the ratio of the plate thickness to the plate length in the direction of the temperature gradient. In many cases the corrections are small even for moderately thick plates.

Investigation on the Post-Ultimate Strength Behaviour of Damaged Stiffened Plate of Ship Structure

2016 ◽  
Author(s):  
Weijun Xu ◽  
Minjie Yuan ◽  
Xiaotian Wang
Keyword(s):  
Ultimate Strength ◽  
Carrying Capacity ◽  
Crack Depth ◽  
Plate Thickness ◽  
Longitudinal Crack ◽  
Load Carrying Capacity ◽  
Stiffened Plate ◽  
Ship Structure ◽  
Plate Length ◽  
Load Carrying

Post-ultimate strength behaviour of ship structure can directly reflect its changing tendency of load carrying capacity. When the external load exerted on the ship structure exceeds the ultimate strength, sharply reduction of load carrying capacity will occur, especially for the damaged ship structure induced from grounding or collision. This paper focuses on the investigation on the post-ultimate strength behaviour of damaged stiffened plate of ship structure by using FEM, a series of stiffened plate modeling with different kinds of cracks are constructed. The parameters of crack includes length, width, depth, plate thickness and distribution direction. The post-ultimate strength behaviour of stiffened plate with cracks and intact ones are compared. Conclusion can be drawn as follows: (1) crack can induce the reduction of ultimate strength of stiffened plate, meanwhile, the stiffness and its load carrying capacity decrease accordingly. (2) in terms of stiffened thin plate, length of crack has a significant influence on the post-ultimate strength behaviour, the width of the crack has a huge influence on ultimate strength while the depth of crack has little influence; in terms of stiffened thick plate, the influence of crack depth on the post-ultimate strength behaviour becomes obvious. The width of the crack influence the post-ultimate strength behaviour a lot. (3) compare to the transverse crack, the influence of longitudinal crack on the post-ultimate strength behaviour is not obvious.

Fibre-reinforced polymer (FRP)-to-concrete joints anchored with FRP anchors: tests and experimental trends

2013 ◽  
Vol 40 (11) ◽  
pp. 1103-1116 ◽  
Author(s):  
Huawen Zhang ◽  
Scott T. Smith
Keyword(s):  
Plate Thickness ◽  
Plate Length ◽  
Reinforced Polymer ◽  
Test Parameters ◽  
Fibre Reinforced Polymer ◽  
Concrete Joints ◽  
Analytical Section ◽  
Influential Parameters ◽  
Best Fit ◽  
Plate Width

This paper reports an investigation on the influence of anchors made from fibre-reinforced polymer (herein FRP anchors) when applied to FRP-to-concrete bonds. The experimental section of the paper consists of 44 tests on FRP-to-concrete joints of which 20 joints are unanchored controls and 24 joints are anchored with FRP anchors. The influence of plate width, plate thickness and plate elastic modulus are considered as these parameters have received little to no attention to date. An increase in plate width is shown to considerably enhance the joint strength although the influence of the anchor decreases. The other two test parameters are shown to be less influential. The analytical section of the paper involves regression modelling of components of a large test database on FRP-to-concrete joints anchored with FRP anchors compiled elsewhere by the authors. The models, which are calibrated in best-fit and design forms, allow experimental trends to be readily observed and quantified within the bounds of the experimental data for three influential parameters of plate length, angle of anchor insertion, and plate width. Finally, a combined regression model is proposed and it is evaluated with tests on FRP-to-concrete joints anchored with multiple anchors.

Time-Mean Wall Static Pressure Distributions and Module Friction Factors for Fully Developed Flows in a Rectangular Duct With Spatially Periodic Interrupted-Plate Inserts

2003 ◽  
Author(s):  
Jose´ A. Candanedo ◽  
Emile Aboumansour ◽  
B. Rabi Baliga
Keyword(s):  
Reynolds Number ◽  
Static Pressure ◽  
Plate Thickness ◽  
Compact Heat Exchangers ◽  
Plate Length ◽  
Plate Spacing ◽  
Pressure Distributions ◽  
Half Height ◽  
Friction Factors ◽  
Spatially Periodic

An experimental study of fully developed flows of air in straight rectangular ducts with interrupted-plate inserts is presented. These flows have features akin to those produced in the cores of plate-fin compact heat exchangers. In all, flows in one plain duct and six different ducts with interrupted-plate inserts were studied. Values of the dimensionless geometric parameters of the interrupted-plate ducts, normalized with respect to its half-height, are the following: width of the duct cross-section between 19.68 and 23.58; plate length between 3.286 and 3.938; plate thickness of 0.062, 0.115, and 0.205; and inter-plate spacing between 3.264 and 7.815. Values of the Reynolds number, based on a nominal average velocity and hydraulic diameter, ranged from 1663 to 30993. The results include graphical and tabular presentations of time-mean static pressure distributions along the axial centerline of the top wall of the duct, and module friction factor versus Reynolds number data, all in the periodic fully developed region.

scholarly journals Separation and Recovery of Refined Si from Al–Si Melt by Modified Czochralski Method

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 996
Author(s):  
Jingwei Li ◽  
Juncheng Li ◽  
Yinhe Lin ◽  
Jian Shi ◽  
Boyuan Ban ◽  
...  
Keyword(s):  
Industrial Application ◽  
Alloy System ◽  
Silicon Powder ◽  
Czochralski Method ◽  
Refining Process ◽  
Solar Grade Silicon ◽  
Solvent Refining ◽  
Grade Silicon ◽  
Czochralski Process ◽  
Removal Fraction

Separation of refined silicon from Al–Si melt is still a puzzle for the solvent refining process, resulting in considerable waste of acid and silicon powder. A novel modified Czochralski method within the Al–Si alloy is proposed. After the modified Czochralski process, a large amount of refined Si particles was enriched around the seed crystalline Si and separated from the Al–Si melt. As for the Al–28%Si with the pulling rate of 0.001 mm/min, the recovery of refined Si in the pulled-up alloy (PUA) sample is 21.5%, an improvement of 22% compared with the theoretical value, which is much larger 1.99 times than that in the remained alloy (RA) sample. The content of impurities in the PUA is much less than that in the RA sample, which indicates that the modified Czochralski method is effective to improve the removal fraction of impurities. The apparent segregation coefficients of boron (B) and phosphorus (P) in the PUA and RA samples were evaluated. These results demonstrate that the modified Czochralski method for the alloy system is an effective way to enrich and separate refined silicon from the Al–Si melt, which provide a potential and clean production of solar grade silicon (SoG-Si) for the future industrial application.

Reliability and Sensitivity Analysis of Infinite Plate Containing Hole

2012 ◽  
Vol 466-467 ◽  
pp. 181-185
Author(s):  
Xiao Ying Li ◽  
Deng Feng Zhang ◽  
Xin Chun Wang
Keyword(s):  
Sensitivity Analysis ◽  
Maximum Stress ◽  
Plate Thickness ◽  
Infinite Plate ◽  
Random Input ◽  
Output Variable ◽  
Plate Length ◽  
Input Variables ◽  
Element Theory ◽  
Plate Width

Based on the finite element theory, the infinite plate containing hole is analyzed in the stretching circumstances. The maximum stress was regarded as a random output variable, when the plate length, the plate width, the plate thickness, the elastic modulus, uniform distribution of load and the diameter of the hole were randomized, and were considered as a random input variable. Supposed all input variables are normal distribution. After one hundred times Monto Carlo sampling is implemented, the reliability and sensitivity of infinite plate containing hole can be obtained.

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