Thermal expansion studies on aluminium-matrix composites with different reinforcement architecture of SiC particles

Huber, Tobias; Degischer, H. P.; Lefranc, G.; Schmitt, Thomas

doi:10.1016/j.compscitech.2005.12.012

Cited by 147 publications

(63 citation statements)

References 10 publications

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“…It should be noted that if the cooling rate is too fast, then the resulting internal stress may be significant. If these stresses exceed the maximum strength of the aluminum alloy, this phase might crack [40][41][42]. indicated that samples S 1 to S 3 have a higher amount of ceramic particles, respectively.…”

Section: -3-mechanical Properties and Fractography Analysismentioning

confidence: 99%

“…The other effective parameter is the presence of ceramic particles. Due to the difference of SiC and Al alloy shrinkage (the thermal expansion coefficient of SiC is about 4×10 −6 C -1 , the thermal expansion coefficient of Al alloy is greater than 20×10 −6 C -1 ), internal stress will increase in the composite materials, leading to the formation of dislocations around the particles, which strengthens the composite [39][40][41][42]. It should be noted that if the cooling rate is too fast, then the resulting internal stress may be significant.…”

Section: -3-mechanical Properties and Fractography Analysismentioning

confidence: 99%

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Stir casting process for manufacture of Al–SiC composites

et al. 2015

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Stir casting is an economical process for the fabrication of aluminum matrix composites. There are many parameters in this process, which affect the final microstructure and mechanical properties of the composites. In this study, micron-sized SiC particles were used as reinforcement to fabricate Al-3 wt% SiC composites at two casting temperatures (680 and 850 °C) and stirring periods (2 and 6 min). Factors of reaction at matrix/ ceramic interface, porosity, ceramic incorporation, and agglomeration of the particles were evaluated by scanning electron microscope (SEM) and high-resolution transition electron microscope (HRTEM) studies. From microstructural characterizations, it is concluded that the shorter stirring period is required for ceramic incorporation to achieve metal/ceramic bonding at the interface. The higher stirring temperature (850 °C) also leads to improved ceramic incorporation. In some cases, shrinkage porosity and intensive formation of Al4C3 at the metal/ceramic interface are also observed. Finally, the mechanical properties of the composites were evaluated, and their relation with the corresponding microstructure and processing parameters of the composites was discussed. AbstractStir casting is an economical process for fabricating aluminium matrix composites. There are

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Section: -3-mechanical Properties and Fractography Analysismentioning

confidence: 99%

Section: -3-mechanical Properties and Fractography Analysismentioning

confidence: 99%

Stir casting process for manufacture of Al–SiC composites

et al. 2015

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“…Al 2 O 3 ), external pressures can be applied, e.g. mechanical (squeeze casting) or by gas (gas pressure infiltration) [8,9]. In addition the wetting of ceramics by metal melts can be improved by changing the chemistry of the metal/ceramic interface.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of three-dimensional interconnected alumina/steel metal matrix composites

et al. 2009

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Three-dimensional interconnected alumina/ steel metal matrix composites (MMCs) were produced by pressureless Ti-activated melt infiltration method using three types of Al 2 O 3 powder with different sizes and shapes. By partial sintering during infiltration an interpenetrating ceramic network was realised. The effect of the ceramic particle size and shape on the resulting ceramic network, volume % fraction and the MMC properties is presented. The MMCs were characterised for mechanical properties at room temperature and elevated temperature. An increase in flexural strength and Young's modulus with decreasing particle size has been observed. In addition, the effect of the volume of ceramic content and the surface finish of the MMCs on the wear behaviour is shown.

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“…M. E. Smagorinski et al found that with the addition of ceramic particles, there was a reduction in CTE of composites and increase in thermal conductivity [14]. The CTE of a composite material depends on various parameters like type of reinforcement, the volume fraction of the reinforcements, properties of the matrix and reinforcement and porosity levels [15] [16] [17]. Thermal expansion behavior of the composites also depends on the stresses developed internally between the matrix and the reinforcement [18].…”

Section: Introductionmentioning

confidence: 99%

Effect of Beryllium Aluminum Cyclosilicate on Thermal Expansion Behavior of Al-Based Composites

Bharat¹,

Prasad²,

Venkateswarlu³

2017

JMMCE

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Beryllium aluminum cyclosilicate, an ore of beryllium was reinforced in Aluminum matrix to fabricate Al-beryl composites using powder metallurgy. Effect of the content of beryllium aluminum cyclosilicate on microstructural hardness and thermal expansion was studied. The coefficient of thermal expansion of Al-beryl composite was measured in the temperature range between 50˚C to 360˚C using dilatometer and was theoretically studied using thermo-elastic models, and these models were used to explain abnormalities observed experimentally. The hardness of Al-beryl metal matrix composites increased with the increase in beryl percentage. Vacuum sintering of Al-beryl metal matrix composites at 600˚C inhibited excellent bonding between the matrix and the particulate increasing the strength of the composite. The result shows the CTE significantly increased with increasing temperature but decreased with increasing reinforcement. At higher temperatures, CTE of Al-beryl metal matrix composites with 5 wt%, 10 wt% and 15 wt% of beryllium aluminum cyclosilicate was 21 ppm/K, 18.2 ppm/K, and 16.8 ppm/K. The CTE values were found to be comparable with theoretical results. The turner model showed conformance with experimental results, was well suited to the experimental results.

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Thermal expansion studies on aluminium-matrix composites with different reinforcement architecture of SiC particles

Cited by 147 publications

References 10 publications

Stir casting process for manufacture of Al–SiC composites

Stir casting process for manufacture of Al–SiC composites

Mechanical properties of three-dimensional interconnected alumina/steel metal matrix composites

Effect of Beryllium Aluminum Cyclosilicate on Thermal Expansion Behavior of Al-Based Composites

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