Silicon dissolution and interfacial characteristics in Si/Al composites fabricated by gas pressure infiltration

Yu, Wentao; Yu, Jinjiang

doi:10.1016/j.matchemphys.2013.02.032

Cited by 17 publications

(5 citation statements)

References 24 publications

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“…On the other hand, the Sip/6061Al interfacial wettability is also enhanced. The sintering densification of the composites is accelerated via the capillary force effect of the Al alloy melt among the Si particles, and by the dissolution–precipitation mechanism of the Si particles in the Al alloy melt [19]. However, an over-high sintering temperature causes non-uniform densification of the composite samples.…”

Section: Resultsmentioning

confidence: 99%

Microstructures and properties of high-fraction Sip–6061Al composites fabricated by pressureless sintering

Wang

Zhang

et al. 2018

Materials Science and Technology

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Pre-treated Si powder (Sip) and 6061Al powder were used to fabricate high-fraction Sip/6061Al composites via pressureless sintering, and the effects of the Sip content and the sintering temperature on the microstructures and properties of the composites were studied. The results show that in the composites, there exist MgAl2O4 nanocrystalline particles, and the Si phase varied from a discontinuous particulate state to a semi-continuous skeleton state as the Si content increased from 30 to 50 wt-%. Densities, bending strengths, hardness, and thermal conductivities of the composites all increased initially and then decreased with the sintering temperature. The 680°C sintered 30 wt-% Sip/6061Al composites and the 700°C sintered 50 wt-% Sip/6061Al composites have the optimal mechanical and thermophysical properties.

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Section: Resultsmentioning

confidence: 99%

Microstructures and properties of high-fraction Sip–6061Al composites fabricated by pressureless sintering

Wang

Zhang

et al. 2018

Materials Science and Technology

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“…Al matrix composites are widely used in automotive industries, electronic packaging for thermal management and precision machined components owing to their attractive mechanical properties, such as low density, high elastic modulus and strength and good fatigue and wear resistance (Scudino et al , 2009; Yu and Yu, 2013; Cai et al , 2015). Reinforcements like fiber, whisker, platelet and particulate are usually introduced for enhancing the mechanical property of the Al matrix composites.…”

Section: Introductionmentioning

confidence: 99%

Preparation, mechanical and anti-friction properties of Al/Si/serpentine composites

Xiao

Zhou

et al. 2018

ILT

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Purpose Serpentine is usually added into the lubricant oil to form a self-repairing protective layer on worn ferrous surface. But few works have paid close attention to the preparation of composites with the addition of serpentine. In this work, serpentine reinforced Al matrix composites were successfully prepared to be industrial lubrication components. And its fabricating parameters, compressive strength and tribological properties were analyzed. Design/methodology/approach An MM-W1 three-pin-on-disk apparatus was used to investigate the tribological properties. The worn surface, microstructure and cross-sectional morphologies were characterized by scanning electron microscopy equipped with energy dispersive spectroscopy. The compression test was carried out on a universal testing machine. An X-ray diffractometer was used to investigate the phase constitutions. The decomposition temperature of serpentine powders was investigated by a thermal analyzer, which allows simultaneous differential scanning calorimetry and thermogravimetry. With the help of finite element method model, a diagrammatic model of the self-repairing surface layer was developed to analyze the anti-friction mechanism. Findings Through evaluating density and Brinell hardness, sintering at 560°C for 3 h are the appropriate parameters for fabricating the composites. Compressive strength was increased by the addition of serpentine. A self-repairing surface layer was formed, reducing the friction coefficient. And a diagrammatic model of the self-repairing surface layer was developed to analyze the anti-friction mechanism. Originality/value Serpentine was added in fabricating the Al matrix composites for the first time. Sintering parameters were optimized to make better Al/Si/serpentine composites. Compressive strength was increased by the addition of serpentine. A self-repairing surface layer was formed, reducing the friction coefficient under the dry sliding condition. And a diagrammatic model of the self-repairing surface layer was developed to analyze the anti-friction mechanism. It is hoped to be helpful in further confirming the factors for the formation of the self-repairing surface layer, and in designing a new industrial anti-friction composite used for dry sliding conditions.

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“…The process of manufacturing the MMC by pressure infiltration is the subject of many scientific studies [4,5] because it is characterised by high efficiency and allows neat-net-shape manufacturing. The porous ceramic preform is the semi-finished reinforcing material, where the main feature is the structure of open, interconnected channels, allowing the free flow of molten metal.…”

Section: Introductionmentioning

confidence: 99%

“…cellulose, polyethylene, carbon fibres) is a flexible method allowing the production of the ceramic preforms. Open, interconnected pore structure enabling penetration of the liquid metal to the whole of preforms volume can be controlled by the selection of the pore-forming addition [5,10]. The attractiveness of the infiltrated composites prompted the authors to attempt to develop light metal matrix composites reinforced by porous ceramic preforms manufactured on the base of halloysite nanotubes.…”

Section: Introductionmentioning

confidence: 99%

Manufacturing of Porous Ceramic Preforms Based on Halloysite Nanotubes (Hnts)

Kujawa

Dobrzański

Matula

et al. 2016

Archives of Metallurgy and Materials

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The aim of this study was to determine the influence of manufacturing conditions on the structure and properties of porous halloysite preforms, which during pressure infiltration were soaked with a liquid alloy to obtain a metal matrix composite reinforced by ceramic, and also to find innovative possibilities for the application of mineral nanotubes obtained from halloysite. The method of manufacturing porous ceramic preforms (based on halloysite nanotubes) as semi-finished products that are applicable to modern infiltrated metal matrix composites was shown. The ceramic preforms were manufactured by sintering of halloysite nanotubes (HNT), Natural Nano Company (USA), with the addition of pores and canals forming agent in the form of carbon fibres (Sigrafil C10 M250 UNS SGL Group, the Carbon Company). The resulting porous ceramic skeletons, suggest innovative application capabilities mineral nanotubes obtained from halloysite.

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Silicon dissolution and interfacial characteristics in Si/Al composites fabricated by gas pressure infiltration

Cited by 17 publications

References 24 publications

Microstructures and properties of high-fraction Sip–6061Al composites fabricated by pressureless sintering

Microstructures and properties of high-fraction Sip–6061Al composites fabricated by pressureless sintering

Preparation, mechanical and anti-friction properties of Al/Si/serpentine composites

Manufacturing of Porous Ceramic Preforms Based on Halloysite Nanotubes (Hnts)

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