Effect of sintering temperature on microstructure and selected properties of spark plasma sintered Al-SiC composites

Leszczyńska-Madej, Beata; Garbiec, Dariusz; Madej, M.

doi:10.1016/j.vacuum.2019.03.033

Cited by 54 publications

(14 citation statements)

References 15 publications

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“…Efficient approaches, such as the addition of alloying elements [ 4 , 5 ], surface modification [ 6 , 7 ], and novel fabrication processes [ 8 , 9 ] can be used to improve wettability and regulate interfacial reactions. In recent studies, the innovative fabrication methods have focused on the interface which has been promoted a large improvement on the mechanical properties of ceramic-reinforced Al matrix composites; for instance, accumulative roll bonding [ 10 , 11 ], powder metallurgy technique [ 12 , 13 ], liquid metal infiltration [ 14 , 15 ], selective laser melting [ 16 , 17 ], plasma spraying [ 18 , 19 ], in situ growth [ 20 , 21 ], and special casting. All the above routes enhanced wettability or inhibited interfacial reactions, improving the properties to some extent.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Al Matrix Composite Enhanced by In Situ Formed SiC, MgAl2O4, and MgO via Casting Process

Jiao

Zhu

et al. 2021

Materials

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Al matrix composite, reinforced with the in situ synthesized 3C–SiC, MgAl2O4, and MgO grains, was produced via the casting process using phenolic resin pyrolysis products in flash mode. The contents and microstructure of the composites’ fracture characteristics were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Mechanical properties were tested by universal testing machine. Owing to the strong propulsion formed in turbulent flow in the pyrolysis process, nano-ceramic grains were formed in the resin pyrolysis process and simultaneously were homogeneously scattered in the alloy matrix. Thermodynamic calculation supported that the gas products, as carbon and oxygen sources, had a different chemical activity on in situ growth. In addition, ceramic (3C–SiC, MgAl2O4, and MgO) grains have discrepant contents. Resin pyrolysis in the molten alloy decreased oxide slag but increased pores in the alloy matrix. Tensile strength (142.6 ± 3.5 MPa) had no change due to the cooperative action of increased pores and fine grains; the bending and compression strength was increasing under increased contents of ceramic grains; the maximum bending strength was 378.2 MPa in 1.5% resin-added samples; and the maximum compression strength was 299.4 MPa. Lath-shaped Si was the primary effect factor of mechanical properties. The failure mechanism was controlled by transcrystalline rupture mechanism. We explain that the effects of the ceramic grains formed in the hot process at the condition of the resin exist in mold or other accessory materials. Meanwhile, a novel ceramic-reinforced Al matrix was provided. The organic gas was an excellent source of carbon, nitrogen, and oxygen to in situ ceramic grains in Al alloy.

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Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Al Matrix Composite Enhanced by In Situ Formed SiC, MgAl2O4, and MgO via Casting Process

Jiao

Zhu

et al. 2021

Materials

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“…The mechanical properties of a SiC/Al composite could be further enhanced if the grain structure of the metal matrix can be refined by incorporating small SiC reinforcements into the Al matrix. [4,5]. Furthermore, heat treatment improves the strength of the matrix alloy when composites are fabricated using heat-treatable Al alloys as a matrix, such as the 2xxx, 6xxx, and 7xxx series [6,7].…”

Section: Introductionmentioning

confidence: 99%

Microstructural Evolution and Strengthening Mechanism of SiC/Al Composites Fabricated by a Liquid-Pressing Process and Heat Treatment

et al. 2019

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Aluminum alloy (Al7075) composites reinforced with a high volume fraction of silicon carbide (SiC) were produced by a liquid-pressing process. The characterization of their microstructure showed that SiC particles corresponding to a volume fraction greater than 60% were uniformly distributed in the composite, and Mg2Si precipitates were present at the interface between the matrix and the reinforcement. A superior compressive strength (1130 MPa) was obtained by an effective load transfer to the hard ceramic particles. After solution heat treatment and artificial aging, the Mg2Si precipitates decomposed from rod-shaped large particles to smaller spherical particles, which led to an increase of the compressive strength by more than 200 MPa. The strengthening mechanism is discussed on the basis of the observed microstructural evolution.

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“…Although a lot of work has been focused on the mechanical properties of Al-based MMCs [19,20,21,22], the understanding of the effects of reinforcements on thermal conductivity of Al-based MMCs is still lacking, and the thermal conductivity is also an important consideration in applications [23,24,25,26], such as in the heat dissipation of electric devices. A low or an inhomogeneous thermal conductivity in MMCs may cause catastrophic failures as a result of overheating or deformation [27,28,29,30].…”

Section: Introductionmentioning

confidence: 99%

Utilization of SiC and Cu Particles to Enhance Thermal and Mechanical Properties of Al Matrix Composites

Huang

Wang

et al. 2019

Materials

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In this work, SiC and Cu particles were utilized to enhance the thermal and mechanical properties of Al matrix composites. The ball-milling and cold-compact methods were applied to prepare Al matrix composites, and the uniform distribution of SiC and Cu particles in the composite confirms the validity of our preparation method. After characterizing the thermal conductivity and the compressibility of the prepared composites, results show that small particles have a higher potential to improve compressibility than large particles, which is attributed to the size effect of elastic modulus. The addition of SiC to the Al matrix will improve the compressibility behavior of Al matrix composites, and the compressibility can be enhanced by 100% when SiC content is increased from 0 to 30%. However, the addition of SiC particles has a negative effect on thermal conductivity because of the low thermal conductivity of SiC particles. The addition of Cu particles to Al-SiC MMCs could further slightly improve the compressibility behavior of Al-SiC/Cu MMCs, while the thermal conductivity could be enhanced by about 100% when the Cu content was increased from 0 to 30%. To meet the need for low density and high thermal conductivity in applications, it is more desirable to enhance the specific thermal conductivity by enlarging the preparation pressure and/or sintering temperature. This work is expected to supply some information for preparing Al matrix composites with low density but high thermal conductivity and high compressibility.

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Effect of sintering temperature on microstructure and selected properties of spark plasma sintered Al-SiC composites

Cited by 54 publications

References 15 publications

Mechanical Properties of Al Matrix Composite Enhanced by In Situ Formed SiC, MgAl2O4, and MgO via Casting Process

Mechanical Properties of Al Matrix Composite Enhanced by In Situ Formed SiC, MgAl2O4, and MgO via Casting Process

Microstructural Evolution and Strengthening Mechanism of SiC/Al Composites Fabricated by a Liquid-Pressing Process and Heat Treatment

Utilization of SiC and Cu Particles to Enhance Thermal and Mechanical Properties of Al Matrix Composites

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