Effect of the processing methods on the formation of Al4C3 in SiCp/2024 Al composites

Shin, Don Soo; Lee, Jae Chul; Yoon, Eui Pak; Lee, Ho In

doi:10.1016/s0025-5408(97)00088-3

Cited by 19 publications

(13 citation statements)

References 9 publications

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“…However, higher temperatures are commonly reached during the manufacture (casting and welding) of AMC products. Studies by other authors ( Shin et al ., 1997 ) agree that formation of Al 4 C 3 at the interfaces degrades the composite because it is hydrophilic and hence brittle and sensitive to moisture contact. Al 4 C 3 formation can thus affect the properties of composites in the following ways: (1) reduction of reinforcement/matrix interfacial strength, (2) reduction of mechanical strength and fracture energy of the composite and (3) increase of corrosion sensitivity in wet environments ( Park & Lucas, 1997).…”

Section: Introductionmentioning

confidence: 86%

Scanning and transmission electron microscopy study of the microstructural changes occurring in aluminium matrix composites reinforced with SiC particles during casting and welding: interface reactions

Ureña¹,

Jm²,

Gil³

et al. 1999

Journal of Microscopy

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Processing of aluminium matrix composites (AMCs), especially those constituted by a reactive system such as Al-SiC, presents great difficulties which limit their potential applications. The interface reactivity between SiC and molten Al generates an aluminium carbide which degrades the composite properties. Scanning and transmission electron microscopes equipped with energy-dispersive X-ray spectroscopes are essential tools for determining the structure and chemistry of the Al-SiC interfaces in AMCs and changes occurring during casting and arc welding. In the present work, an aluminium-copper alloy (AA2014) reinforced with three different percentages of SiC particles was subjected to controlled remelting tests, at temperatures in the range 750-900 degrees C for 10 and 30 min. Arc welding tests using a tungsten intert gas with power inputs in the range 850-2000 W were also carried out. The results of these studies showed that during remelting there is preferential SiC particle consumption with formation of Al4C3 by interface reaction between the solid SiC particle and the molten aluminium matrix. The formation of Al4C3 by the same mechanism has also been detected in molten pools of arc welded composites. However, in this case there was formation of an almost continuous layer of Al4C3, which protects the particle against further consumption, and formation of aciculate aluminium carbide on the top weld. Both are formed by fusion and dissolution of the SiC in molten aluminium followed by reaction and precipitation of the Al4C3 during cooling.

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Section: Introductionmentioning

confidence: 86%

Scanning and transmission electron microscopy study of the microstructural changes occurring in aluminium matrix composites reinforced with SiC particles during casting and welding: interface reactions

Ureña¹,

Jm²,

Gil³

et al. 1999

Journal of Microscopy

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“…e manufacturing of 50 vol percent tungsten carbide/2025Al composites has not yet been reported by Spark plasma sintering through orthogonal experimental design. tungsten carbide/2025Al/SiC composites with large volume proportions of SiC were the focus of this research, and mechanical study was employed to explore the mechanical characteristics of the composite material [26][27][28]. It was feasible to compare the effects of various factors on the best sintering conditions for 50 vol percent tungsten carbide/ 2025Al composites using orthogonal experimental design (such as temperature, pressure, and holding time) [29].…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Spark Plasma Sintering Process for High-Volume Fraction Tungsten Carbide/Al 2025 Composites

Mahesha

Suprabha

Polayya³

et al. 2022

Advances in Materials Science and Engineering

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With an orthogonal experimental design, Spark plasma sintering method was used to create tungsten carbide with Al 2025 composites. Pressure, temperature, and hold time all had an influence on the mechanical characteristics of the composites. Pressure had the greatest effect on density and bending strength, followed by temperature and holding duration. After five minutes of sintering at 556°C under 40 MPa, a 50% tungsten carbide/Al 2025 composite material was produced, resulting in a density of 997.7 percent and a spectacular bending strength of 766.65 MPa. This study revealed the ability of high-volume fraction mixes to support huge loads.

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“…As well known, reaction (1) exists in the Al/SiC composite universally [13][14][15][16][17] and the resultant products of reaction are definite. The formation of a cylindrical-shaped phase near the interface of Al matrix and SiC particles in SiC P /Al-11.7Fe-1.3V-1.7Si composite after heat exposure at 620 • C for 10 h can also be reported, as shown in Fig.…”

Section: The Microstructures Of the Compositementioning

confidence: 93%

The Thermal Stability and Elevated Temperature Mechanical Properties of Spray-Deposited SiCp/Al–11.7Fe–1.3V–1.7Si Composite

Liu¹,

He²,

Wang³

et al. 2009

Advanced Composite Materials

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The thermal stability and elevated temperature mechanical properties of SiC p /Al-11.7Fe-1.3V-1.7Si (Al-11.7Fe-1.3V-1.7Si reinforced with SiC particulates) composites sheets prepared by spray deposition (SD) → hot pressing → rolling process were investigated. The experimental results showed that the composite possessed high σ b (elevated temperature tensile strength), for instance, σ b was 315.8 MPa, which was tested at 315 • C, meanwhile the figure was 232.6 MPa tested at 400 • C, and the elongations were 2.5% and 1.4%, respectively. Furthermore, the composite sheets exhibited excellent thermal stability: the hardness showed no significant decline after annealing at 550 • C for 200 h or at 600 • C for 10 h. The good elevated temperature mechanical properties and excellent thermal stability should mainly be attributed to the formation of spherical α-Al 12 (Fe, V) 3 Si dispersed phase particulates in the aluminum matrix. Furthermore, the addition of SiC particles into the alloy is another important factor, which the following properties are responsible for. The resultant Si of the reaction between Al matrix and SiC particles diffused into Al matrix can stabilize α-Al 12 (Fe, V) 3 Si dispersed phase; in addition, the interface (Si layer) improved the wettability of Al/SiC P , hence, elevated the bonding between them. Furthermore, the fine Al 4 C 3 phase also strengthened the matrix as a dispersion-strengthened phase. Meanwhile, load is transferred from Al matrix to SiC particles, which increased the cooling rate of the melt droplets and improved the solution strengthening and dispersion strengthening.

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Effect of the processing methods on the formation of Al4C3 in SiCp/2024 Al composites

Cited by 19 publications

References 9 publications

Scanning and transmission electron microscopy study of the microstructural changes occurring in aluminium matrix composites reinforced with SiC particles during casting and welding: interface reactions

Scanning and transmission electron microscopy study of the microstructural changes occurring in aluminium matrix composites reinforced with SiC particles during casting and welding: interface reactions

Optimization of the Spark Plasma Sintering Process for High-Volume Fraction Tungsten Carbide/Al 2025 Composites

The Thermal Stability and Elevated Temperature Mechanical Properties of Spray-Deposited SiCp/Al–11.7Fe–1.3V–1.7Si Composite

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