Effect of copper electroless coatings on the interaction between a molten Al–Si–Mg alloy and coated short carbon fibres

Ureña, A.; Rams, J.; Escalera, M.D.; Sánchez, M.

doi:10.1016/j.compositesa.2007.02.005

Cited by 75 publications

(41 citation statements)

References 16 publications

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“…In particular, the thickness of the coating or metal matrix composites can be better controlled to prevent coating overgrowth. Moreover, because the Ni-P, Ni, and Cu reactive coatings in most studied cases dissolve when in contact with liquid aluminum alloys (Ref 16,21,22), the developed method can also help to control the formation of brittle phases during the infiltration process through the adjustment of the coating thickness and the mechanical properties of the aluminum alloys matrix composite.…”

Section: Discussionmentioning

confidence: 99%

Quantitative Image Analysis of Ni-P Coatings Deposited on Carbon Fibers

Kozera

Bucki

Sałacińska

et al. 2015

J. of Materi Eng and Perform

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In this work, polyacrylonitrile (PAN)-based carbon fibers coated with different thicknesses of Ni-P coatings were studied. The coatings were deposited by electroless metallization lasting from 3 to 22 min and consisted of approximately 3 wt.% phosphorous. Computer quantitative image analysis was used to characterize the surface features and thickness of the coatings as a function of the time of metallization. The results showed that quantitative image analysis is a useful technique for the measurement of the coating thickness and can be used as a tool for obtaining an innovative description of the Ni-P coating morphology. The morphology of the coatings and their thicknesses were investigated by scanning electron microscopy. The image analyses were performed using the proprietary software Micrometer, developed at the Faculty of Materials Science and Engineering, Warsaw University of Technology. The observations revealed that a specific feature of the coating topography is the hemispherical bulge of a diameter ranging from 0.1 to 10 lm. The thickness of the coatings increases linearly with the metallization time. The obtained results indicated that the methodology proposed in the present work can be successfully applied and possesses several advantages over the traditionally used weight measurements technique.

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Section: Discussionmentioning

confidence: 99%

Quantitative Image Analysis of Ni-P Coatings Deposited on Carbon Fibers

Kozera

Bucki

Sałacińska

et al. 2015

J. of Materi Eng and Perform

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“…Some previous attempts have been conducted to improve the interfacial adherence by additional coating such as Cu, Ni or alumina onto the carbon fiber surface in aluminum matrix composites, whereas the properties of coated Al/C sf composites were lower than the uncoated composite, although the extra coatings may possess lower mechanical properties [9,23,26,27]. In the stress-stain flow curve shown in Fig.…”

Section: Tensile Propertiesmentioning

confidence: 99%

“…Consequently, the silicon layer was deposited in form of iron intermetallic, improving the wettability and inhibiting undesirable reactions, thus the extra coatings mentioned [23] such as copper or nickel are not needed. The size of Si particles in this method was very fine with an average size around 1 μm (Fig.…”

Section: Microstructurementioning

confidence: 99%

Microstructure and properties of aluminum silicon/short fibre carbon composites fabricated by semi-solid thixomixing

2015

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A novel method was developed, based on thixotropic nature of semi-solid slurry of aluminum silicon alloy, for the effective dispersion and distribution of short carbon fibers (C sf ) under intensive shear stress (τ) into the eutectic without physical or chemical damage.The C sf were distributed homogeneously into the matrix at optimum conditions: a temperature of 576-580 °C, around 48% of solid fraction, and rotation speed of mixing was at 100 rpm. The gas entrapment and porosity was a challenge in the fabrication the aluminum composite by thixomixing, and its size increased when the samples were heat treated. The extruded and heat treated composites had around 24% improvement of mechanical strength as assessed by tensile tests. The predominant deposition of silicon and its intermetallics at the interfacial region improved the wettability and adherence to achieve good mechanical properties. The formation of some intermetallics can be helpful to overcome low wettability effects and their structural evolutions were impressive. The fractography analysis illustrated the ductile fracture with some plastic deformation as the results of dimples and some fiber pull-out in the fractured surface. Ultra-micro hardness evaluation showed good interfacial bonding after heat treatment. The thixomixing process can be developed to produce various composites with different reinforcement.

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“…Metallic coatings of nickel or copper have been widely used to improve the wettability of carbon fibres and ceramic particles by molten aluminum alloys. [22][23][24][25][26][27][28][29] To the best of our knowledge, no attempt has been made to coat ceramic particles with cobalt using an ED method.…”

Section: Aluminum Metal Matrix Composites (Ammcs)mentioning

confidence: 99%

A Novel Method for Incorporation of Micron-Sized SiC Particles into Molten Pure Aluminum Utilizing a Co Coating

Mohammadpour

Khosroshahi

Mousavian

et al. 2014

Metall Mater Trans B

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Ceramic particles typically do not have sufficiently high wettability by molten metal for effective bonding during metal matrix composite fabrication. In this study, a novel method has been used to overcome this drawback. Micron-sized SiC particles were coated by a cobalt metallic layer using an electroless deposition method. A layer of cobalt on the SiC particles was produced prior to incorporation in molten pure aluminum in order to improve the injected particle bonding with the matrix. For comparison, magnesium was added to the melt in separate experiments as a wetting agent to assess which method was more effective for particle incorporation. It was found that both of these methods were more effective as regard ceramic particulate incorporation compared with samples produced with as-received SiC particles injected into the pure aluminum matrix. SEM images indicated that cobalt coating of the particles was more effective than magnesium for incorporation of fine SiC particles (below 30 lm), while totally the incorporation percentage of the particles was higher for a sample in which Mg was added as a wetting agent. In addition, microhardness tests revealed that the cobalt coating leads to the fabrication of a harder composite due to increased amount of ceramic incorporation, ceramic-matrix bonding, and possibly also to formation of Al-Co intermetallic phases.

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Effect of copper electroless coatings on the interaction between a molten Al–Si–Mg alloy and coated short carbon fibres

Cited by 75 publications

References 16 publications

Quantitative Image Analysis of Ni-P Coatings Deposited on Carbon Fibers

Quantitative Image Analysis of Ni-P Coatings Deposited on Carbon Fibers

Microstructure and properties of aluminum silicon/short fibre carbon composites fabricated by semi-solid thixomixing

A Novel Method for Incorporation of Micron-Sized SiC Particles into Molten Pure Aluminum Utilizing a Co Coating

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