Dissolution kinetics of primary silicon in hypereutectic Al–Si melt

Zhang, Rong; Cao, Qiufang; Pang, Shuxian; Wei, Yun; Li, Lin

doi:10.1016/s1468-6996(01)00017-1

Cited by 41 publications

(10 citation statements)

References 6 publications

(5 reference statements)

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“…3, the primary silicon particles still remain as solid particles in the melt for some time. 22) Therefore, the remaining primary silicon particles will be refined when the melt is imposed by the electromagnetic vibrations. As another effect of the electromagnetic vibrations, the melt was gradually cooled down due to the increase of contact with the quartz tube at a low temperature.…”

Section: Methodsmentioning

confidence: 99%

Effect of the Intensity and Frequency of Electromagnetic Vibrations on Refinement of Primary Silicon in Al-17%Si Alloy

et al. 2004

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Electromagnetic vibrations, which are the interaction between a static magnetic field and an alternating electric field, were applied to the structural refinement of Al-17%Si hyper-eutectic alloy. The relationship between the intensity and frequency of the electromagnetic vibrations and the refinement of primary silicon particles is quantitatively investigated. In the frequency range from 10 Hz to 30 kHz, the vibration frequency near 1 kHz was most effective for the refinement of silicon particles, and silicon particles of sizes up to approximately 5 mm were refined at that frequency. The level of refinement increased with increasing the intensity of electromagnetic vibrations. A primary silicon particle was sufficiently refined with a magnetic field intensity of only approximately 1.6 Tesla (T).

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Section: Methodsmentioning

confidence: 99%

Effect of the Intensity and Frequency of Electromagnetic Vibrations on Refinement of Primary Silicon in Al-17%Si Alloy

et al. 2004

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“…The brittleness of the coarse Si crystals (both eutectic and primary silicon) is the main reason responsible for the poor properties of Al–Si alloys because coarse silicon crystals lead to premature crack initiation and fracture in tension [ 7 , 8 ]. In order to refine the primary silicon, many methods have been carried out, such as high-pressure casting, the rapid solidification technique [ 9 ], and melt overheating treatment [ 10 – 12 ]. However, these processes are complex and difficult to control.…”

Section: Introductionmentioning

confidence: 99%

Effect of Al–5Ti–C Master Alloy on the Microstructure and Mechanical Properties of Hypereutectic Al–20%Si Alloy

et al. 2014

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Al–5Ti–C master alloy was prepared and used to modify hypereutectic Al–20%Si alloy. The microstructure evolution and mechanical properties of hypereutectic Al–20%Si alloy with Al–5Ti–C master alloy additions (0, 0.4, 0.6, 1.0, 1.6 and 2.0 wt%) were investigated. The results show that, Al–5Ti–C master alloy (0.6 wt%, 10 min) can significantly refine both eutectic and primary Si of hypereutectic Al–20%Si alloy. The morphology of the primary Si crystals was significantly refined from a coarse polygonal and star-like shape to a fine polyhedral shape and the grain size of the primary Si was refined from roughly 90–120 μm to 20–50 μm. The eutectic Si phases were modified from a coarse platelet-like/needle-like structure to a fine fibrous structure with discrete particles. The Al–5Ti–C master alloy (0.6 wt%, 30 min) still has a good refinement effect. The ultimate tensile strength (UTS), elongation (El) and Brinell hardness (HB) of Al–20%Si alloy modified by the Al–5Ti–C master alloy (0.6 wt%, 10 min) increased by roughly 65%, 70% and 51%, respectively, due to decreasing the size and changing the morphology on the primary and eutectic Si crystals. The change in mechanical properties corresponds to evolution of the microstructure.

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“…Hypereutectic Al-Si alloy, which has a low coefficient of expansion, high wear resistance and corrosion resistance, as well as less density and good thermal conductivity [1][2][3][4][5], is broadly applied to the automobile and spaceflight fields [6][7]. In the manufacturing segment for automobiles, the research on automobile materials with high properties has become one of the important tasks for the development of automobile industry, especially in terms of the materials of key parts and components, such as engine pistons and rotors.…”

Section: Introductionmentioning

confidence: 99%

Effect of mixed rare earth oxides and CaCO3 modification on the microstructure of an in-situ Mg2Si/Al-Si composite

2009

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The effects of mixed rare earth oxides and CaCO 3 on the microstructure of an in-situ Mg 2 Si/Al-Si hypereutectic alloy composite were investigated by optical microscope, scanning electron microscope, and energy dispersive spectrum analysis. The results showed that the morphology of the primary Mg 2 Si phase particles changed from irregular or crosses to polygonal shape, their sizes decreased from 75 μm to about 25 μm, and the compound of both the oxide and CaCO 3 was better than either the single mixed rare earth oxides or CaCO 3 .

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Dissolution kinetics of primary silicon in hypereutectic Al–Si melt

Cited by 41 publications

References 6 publications

Effect of the Intensity and Frequency of Electromagnetic Vibrations on Refinement of Primary Silicon in Al-17%Si Alloy

Effect of the Intensity and Frequency of Electromagnetic Vibrations on Refinement of Primary Silicon in Al-17%Si Alloy

Effect of Al–5Ti–C Master Alloy on the Microstructure and Mechanical Properties of Hypereutectic Al–20%Si Alloy

Effect of mixed rare earth oxides and CaCO3 modification on the microstructure of an in-situ Mg2Si/Al-Si composite

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