Metal matrix composites: production by the stir casting method

Hashim, J.; Looney, L.; Hashmi, M.S.J.

doi:10.1016/s0924-0136(99)00118-1

Cited by 1,122 publications

(527 citation statements)

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“…ED method is a Al-1 wt pct Mg as matrix and as-received SiC powders as reinforcement S 3 pure Al as matrix and Co-coated SiC powders as reinforcement 14-VOLUME 46B, FEBRUARY 2015 METALLURGICAL AND MATERIALS TRANSACTIONS B simple low-cost route which could fabricate a core ceramic-metallic shell structure to be used for industrial applications. Figure 6 shows the morphology of SiC powders coated by cobalt.…”

Section: Resultsmentioning

confidence: 99%

“…Due to these advantages, they are used in aerospace industries (airframe and aerospace components), automobile industries (engine pistons), and electronic components. [1][2][3][4][5][6][7][8] Many techniques have been developed for producing particulate-reinforced AMMCs, such as stir casting, squeeze casting, [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] and powder metallurgy. [19][20][21] Although each of these methods has its own advantages and disadvantages, they are all relatively expensive.…”

Section: Aluminum Metal Matrix Composites (Ammcs)mentioning

confidence: 99%

“…However, methods of achieving the following in stir casting are mostly to be considered: (i) no adverse chemical reaction between the reinforcement material and matrix alloy, (ii) no or very low porosity in the cast AMMCs, (iii) wettability between the two main phases, and (iv) achieving a uniform distribution of the reinforcement material. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] Some of the methods used to achieve these goals during stir casting of aluminum matrix composites are the modification of the alloy composition, coating or specific treatments to the reinforcements, and control of the process parameters (stirring temperature and time, etc.). [11][12][13][14] Among these, coating of the reinforcement is a successful technique used to prevent adverse interfacial reaction and promote wetting of the particles by aluminum through increasing the overall surface energy of the solid.…”

Section: Aluminum Metal Matrix Composites (Ammcs)mentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 99%

Section: Aluminum Metal Matrix Composites (Ammcs)mentioning

confidence: 99%

Section: Aluminum Metal Matrix Composites (Ammcs)mentioning

confidence: 99%

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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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“…The choice of appropriate manufacturing method highly alters the resulting composite microstructure, dispersion of ceramic agents, interfacial bonding between the matrix phase and reinforcement particle and mechanical performances [5]. The manufacturing method to be employed is greatly based upon the type of reinforcement and metallic material.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Metallurgical Examinations of Stir Cast Aluminum Matrix Composites: A Review Study

Kaushik¹,

Singhaal²

2017

IJET

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Abstract--The drift of research work from monolithic aluminum alloy to composite materials like Metal Matrix Composites (MMC's) is due to the world-wide proviso for economical, high working performance and superior quality materials. Metal matrix composites especially aluminum matrix composites (AMC's) due to their excellent strength with respect to their weight, superior wear resistance, economical and high corrosion resistance are extensively produced and utilized in several applications like, architectural components, structural applications, aerospace, automobile industry, ship building and many sports items and electrical and electronic components. The reinforcements like SiC, B 4 C, Al 2 O 3 , TiB 2 , Red mud, Graphite, Fly ash, and Coconut ash etc. can be easily incorporated as reinforcement agents in the molten melt by employing the economical and widely used stir casting technique, which improves strength, stiffness, fatigue, hardness, wear and creep properties of the AMCs. This paper gives an overview of mechanical, microstructural and wear performances of aluminum centered metal matrix composites produced by stir casting process reinforced with single and multiple types of reinforcements. The problems like reinforcement-metal matrix bonding, distribution of particles, wettability of reinforcing particles and agglomeration phenomenon are discussed in this paper. The effect of various reinforcement particles on aluminum matrix composites on mechanical properties like uts, ys, stiffness, hardness, fatigue, % E, wear and on resulting microstructure is discussed. The Modified and dual step stir casting technique for the fabrication of AMCs is also discussed in this paper. Keywords: Aluminum matrix composite (AMC), stir casting, reinforcement, mechanical properties, wear behavior I. INTRODUCTIONMetal based matrix composites reinforced with ceramic agents have a wide range of applications in aerospace, automobile, structural components and defense sector. Monolithic aluminum alloys have limitations in achieving good combinations of mechanical properties like strength, toughness, stiffness, wear resistance and density. Metal matrix composites are produced to overcome these shortcomings and to encounter the worldwide requirement for light weight materials with higher specific strength, corrosion resistant, high stiffness and excellent wear resistant properties [1][2]. The properties of aluminum alloy like low density, light weight, easy processing technique and fine engineering characterstics favored it as matrix material in MMC's [3]. The aluminum matrix series like AA2xxx, AA5xxx, AA6xxx, and AA7xxx have numerous applications in aerospace, defense instrument, architectural and structural components, automobile, sports good, and ship building [1][2][3][4].For the fabrication of metallic matrix composites several type of manufacturing methods are employed. The choice of appropriate manufacturing method highly alters the resulting composite microstructure, dispersion of ceramic agents, interfacial bonding betwe...

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“…A solution is offered by techniques which involve modifying the ceramic surface e.g. by covering it with appropriate coatings (more easily wettable by molten metal) and/or enriching the chemical composition of the metal with additives lowering its surface tension in the liquid phase [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Preliminary Tests of Cellular SiC/Iron Alloy Composite Produced by a Pressureless Infiltration Technique

Lipowska

Psiuk

Cholewa

et al. 2017

Archives of Foundry Engineering

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Preliminary tests aimed at obtaining a cellular SiC/iron alloy composite with a spatial structure of mutually intersecting skeletons, using a porous ceramic preform have been conducted. The possibility of obtaining such a composite joint using a SiC material with an oxynitride bonding and grey cast iron with flake graphite has been confirmed. Porous ceramic preforms were made by pouring the gelling ceramic suspension over a foamed polymer base which was next fired. The obtained samples of materials were subjected to macroscopic and microscopic observations as well as investigations into the chemical composition in microareas. It was found that the minimum width of a channel in the preform, which in the case of pressureless infiltration enables molten cast iron penetration, ranges from 0.10 to 0.17 mm. It was also found that the ceramic material applied was characterized by good metal wettability. The ceramics/metal contact area always has a transition zone (when the channel width is big enough), where mixing of the components of both composite elements takes place.

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Metal matrix composites: production by the stir casting method

Cited by 1,122 publications

References 17 publications

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

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

Mechanical and Metallurgical Examinations of Stir Cast Aluminum Matrix Composites: A Review Study

Preliminary Tests of Cellular SiC/Iron Alloy Composite Produced by a Pressureless Infiltration Technique

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