Si coarsening of spray-formed high loading hypereutectic Al–Si alloys in the semisolid state

Chiang, Chen‐Yu; Tsao, Chi-Yuan A.

doi:10.1016/j.msea.2005.01.017

Cited by 41 publications

(14 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the average length of primary Si dendrites demonstrates similar tendency in the content range from 30 wt.% to 55 wt.%. This result is consistent with the conventional understanding that the Si size increases with increasing initial Si content in a hypereutectic Al-Si alloy [23]. However, further increasing the Si content (> 55 wt.%), the average length of primary Si dendrites decreases inversely.…”

Section: Resultssupporting

confidence: 91%

Effect of Si Content on the Morphology Evolution of the Si Primary Dendrites in Al-Si Alloy Solvent Refining Process

Gao

Zhao

Gao

et al. 2021

Silicon

View full text Add to dashboard Cite

Solvent re ning with Al-Si alloy is a promising puri cation method for production of solar-grade silicon (SoG-Si) feedstock owing to the advantages of low production cost and high impurity removal e ciency. In this process, larger re ned Si primary dendrites are easily collected after acid leaching, which is favorable to recovery, thereby to reduce the production cost. Hence, the growth behavior of the precipitated Si crystal must be investigated systematically. In present work, the morphology evolution of solidi ed Al-Si alloys with a wide range of Si content (30~70 wt.%) was analyzed. The typical plate-like Si primary dendrites grown following the twin plane re-entrance edge (TPRE) mechanism formed in all alloy compositions. As increasing the Si content from 30 wt.% to 50 wt.%, the Si primary dendrites underwent a coarsening process attributed to the preferred growth along <211> and <111> directions, leading to an increase in the experimental recovery rate. However, the preferred growth along <211> direction was inhibited when the Si content is higher than 55 wt.%. Moreover, the broken effect originating from grain collision and thermal stress on the Si primary dendrites was enhanced as further increasing the Si content, resulting in a decrease in the experimental recovery rate. Therefore, the optimum composition is determined as Al-50~55 wt.% Si for solvent re ning solution, based on the cost reduction consideration.the manuscript was written by Mangmang Gao and all authors commended on previous versions of the manuscript. All authors read and approved the nal manuscript.

show abstract

Section: Resultssupporting

confidence: 91%

Effect of Si Content on the Morphology Evolution of the Si Primary Dendrites in Al-Si Alloy Solvent Refining Process

Gao

Zhao

Gao

et al. 2021

Silicon

View full text Add to dashboard Cite

show abstract

“…It has been reported that the cooling rates vary from 10 2 to 10 4 K s −1 [24] with the different powder size, atomization pressure and thermal coefficient of the injection gas [25][26][27]. Generally, small powders possess large specific surface areas, which are beneficial to the thermal conduction and rapid solidification.…”

Section: Microstructure Of As-atomized Powdersmentioning

confidence: 99%

Microstructure and mechanical properties of Al–Si–Ni–Ce alloys prepared by gas-atomization spark plasma sintering and hot-extrusion

Wang

Xian

Wang

et al. 2011

Materials Science and Engineering: A

View full text Add to dashboard Cite

“…At the same time, high-silicon aluminum alloy also can be plated by copper, nickel and other materials to produce a good plating effect [7,8]. In recent years, researchers have done a lot of research about high-silicon aluminum [9,11]. But very little research has been done on its welding technology and property.…”

Section: Introductionmentioning

confidence: 99%

Effect of different surface pretreatment method on vacuum brazing joint properties of AlSi50 alloy

et al. 2020

View full text Add to dashboard Cite

In this paper, the effect of different surface pretreatment method on properties of vacuum brazed joint of AlSi50 alloy was investigated. The surface pretreatment methods of specimen before brazing include sanding, NaOH corrosion, HCl corrosion, H2SO4 corrosion and nickel plating. The experimental results indicate that the width of brazing joint varies with different surface pretreatment methods. The joint with sanding pretreatment, has the largest brazing seam width of 20 μm. Meanwhile, joint with H2SO4 corrosion has the narrowest brazing seam width. The brazing filler metal can wet and spread on different pretreated specimen very well. Spectrum analysis indicates that nickel-plate on AlSi50 surface, can interact with brazing filler metal, which increases mechanical property of brazing joint. For brazing of AlSi50 alloy, the optimal pretreatment method is nickel plating. After nickel plating pretreatment, brazing joint has the maximum shear strength 82.05 MPa by using brazing filler metal Al52-Cu33-Mg12-Ni3 and following technological parameters: brazing temperature 580 ℃, soaking time 30 min and pressure 3 MPa.

show abstract

Si coarsening of spray-formed high loading hypereutectic Al–Si alloys in the semisolid state

Cited by 41 publications

References 20 publications

Effect of Si Content on the Morphology Evolution of the Si Primary Dendrites in Al-Si Alloy Solvent Refining Process

Effect of Si Content on the Morphology Evolution of the Si Primary Dendrites in Al-Si Alloy Solvent Refining Process

Microstructure and mechanical properties of Al–Si–Ni–Ce alloys prepared by gas-atomization spark plasma sintering and hot-extrusion

Effect of different surface pretreatment method on vacuum brazing joint properties of AlSi50 alloy

Contact Info

Product

Resources

About