Al2O3/Al particle-reinforced aluminum matrix composite by displacement reaction

Hanabe, M.; Aswath, Pranesh B.

doi:10.1557/jmr.1996.0195

Cited by 31 publications

(10 citation statements)

References 6 publications

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“…The reactive penetration behaviors in these systems have been investigated by many researchers. [2][3][4][5][6][7][8][9][10][11][12][13][14] For instance, Brondike [5] studied the penetration of silica refractories by molten Al at temperatures between 700°C and 1000°C. He observed the dissolution of Si in molten Al and concluded that the penetration rate was controlled by the diffusion of Al and Si through aluminum oxide.…”

Section: Introductionmentioning

confidence: 99%

“…They suggested that a large volume contraction, approximately 35 pct, was responsible for the extensive cracking at the reaction front, which permitted liquid Al to transgress and interact with the unreacted SiO 2 precursor. Recently, Hanabe and Aswath, [10] Liu and Koster, [11] Yoshikawa et al, [12,13] and Fahrenholtz et al [3,14] have also fabricated the interpenetrating Al 2 O 3 / Al(Si) composites using the reactive metal penetration technique and, respectively, investigated the microstructure, properties, and reaction layer growth kinetics.…”

Section: Introductionmentioning

confidence: 99%

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Reactive wetting of SiO2 substrates by molten Al

Shen

Fujii

Matsumoto

et al. 2004

Metall Mater Trans A

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The reactive wetting behavior of SiO 2 substrates by molten Al was investigated at temperatures between 800°C to 1250°C in a purified Ar-3 pct H 2 atmosphere of about 0.11 MPa using an improved sessile drop method. The time dependence of the changes in contact angle and droplet geometry was monitored and the wetting kinetics was identified. The initial equilibrium or quasi-equilibrium contact angles are generally larger than 90 deg and do not significantly vary with temperature. The subsequent remarkable decrease in the contact angle mainly results from the progressive decrease in the droplet volume rather than the advance of the solid-liquid interfacial front. The significant effect of temperature on the wetting kinetics is essentially related to its effect on the reaction and molten Al penetration progress. For systems with a considerable decrease in the droplet volume during reactive wetting, a criterion for evaluation of the true wetting improvement was proposed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reactive wetting of SiO2 substrates by molten Al

Shen

Fujii

Matsumoto

et al. 2004

Metall Mater Trans A

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“…Pressureless displacement method is developed as a novel approach for the manufacture of composites by some scientists [41,[125][126][127]. This method is based on using chemical interactions for driving the liquid into a porous structure.…”

Section: Infiltration Methodsmentioning

confidence: 99%

Étude de la mouillabilité des particules granulaires par les alliages d'aluminium durant la filtration d'aluminium /

Ergin¹

2006

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SUMMARYThis thesis was undertaken to study the wetting between granular media (alumina) and Al-Mg alloys. The objective was to develop a test method to characterize different granular alumina particles and differentiate one from the other by using the wettability concept. Two types of experimental methods were used to measure the wetting: sessile drop and infiltration methods.The sessile drop system constructed is one of the few, if not the only one, available in Canada in which the contact angle measurements can be carried out with a liquid metal drop injected directly onto the solid surface. However, the results indicated that this method is not appropriate to differentiate different granular alumina particles due to prevention, by the rough surface, of the droplets taking their proper form.Using the infiltration system, various alumina particles were tested. The data obtained from these tests were analyzed using three capillary models based on: (i) an energy balance with an average pore size, (ii) an energy balance with a pore size distribution, and (iii) a force balance with periodically changing pore radius. The two models based on the energy balance were developed especially for infiltration experiments, and the third one was taken from the literature. The results were consistent and showed that it was possible to differentiate different alumina samples with the infiltration method. The reactions taking VI place between Al-Mg alloys and different alumina particles were also investigated by using the infiltration technique. SEM and TEM analyses showed that spinel was formed independent of the experiment duration and the type of alumina particles used in the experiments at 1000 K under argon atmosphere. The theraiodynamic analysis indicated the same tendency.

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“…The coarsened microstructure by addition of Mg is consistent with the previous report. 11) Existing phases in the composite material using Al scrap were determined by XRD and the profile is shown in Fig. 3.…”

Section: Microstructurementioning

confidence: 99%

Utilization of Al Scrap for Fabrication of Al(alloy)/Al2O3 Composite Material

et al. 2003

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In status quo, Al scrap melt is diluted with pure Al and adjusted its composition for reuse. We studied a method to utilize Al scrap directly for fabricating composite materials, which can be used for machine elements having resistance to abrasion. The composite material is a product of displacement reaction between molten Al scrap and SiO 2 . Its microstructure consists of Al 2 O 3 network and Al alloy among them. In this study, Al alloy was prepared which have a composition of Al scrap due to window frame of houses. The synthesized Al scrap are melted and reacted with SiO 2 at 1473 K to obtain the composite material. The mechanical properties of this material were compared with Al/Al 2 O 3 and (AlFe)/Al 2 O 3 composite materials fabricated using pure Al, and Al-Fe alloy, respectively. It was demonstrated that the composite materials using scrap had a little higher strength and hardness than Al/Al 2 O 3 , and they were not broken into pieces upon fracture, as occurred in the case of (Al-10 at%Fe)/Al 2 O 3 . Further studies needed for application of this method was discussed. It was pointed out that the reactivity and the property change with compositional fluctuations of the scraps and reduction of the reaction temperature have to be taken into consideration.

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Al₂O₃/Al particle-reinforced aluminum matrix composite by displacement reaction

Cited by 31 publications

References 6 publications

Reactive wetting of SiO2 substrates by molten Al

Reactive wetting of SiO2 substrates by molten Al

Étude de la mouillabilité des particules granulaires par les alliages d'aluminium durant la filtration d'aluminium /

Utilization of Al Scrap for Fabrication of Al(alloy)/Al<SUB>2</SUB>O<SUB>3</SUB> Composite Material

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