Microstructures and mechanical properties of Cu/Ti3SiC2/C/MWCNTs composites prepared by vacuum hot-pressing sintering

Jiang, Xiaosong; Liu, Wanxia; Li, Jingrui; Shao, Zhang; Zhu, Donghui

doi:10.1016/j.jallcom.2014.08.221

Cited by 30 publications

(17 citation statements)

References 15 publications

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“…With an increase in the alumina whisker content, the porosity of the composites increased and the density of the composites decreased, thereby reducing the hardness of the composite materials. Liu et al [4] examined Ti 3 SiC 2 /C/MW-CNTs reinforced copper matrix composites and concluded that the hardness of composite materials decreases when the content of multi-walled carbon nanotubes (MW-CNTs) increased. The main reason is that MW-CNTs can easily agglomerate, promoting the formation of defects in the composite materials and destroying their integrity.…”

Section: Resultsmentioning

confidence: 99%

“…However, with the rapid development of aerospace and electronic power industries, traditional copper matrix composites can no longer satisfy the high requirements for the above-mentioned properties, and it is therefore highly important and essential to design and study copper matrix composites with better mechanical properties. Carbon nanotubes (CNTs) and graphene nano-sheets are widely used in copper matrix composites as reinforcement materials owing to their unique structure and excellent properties [4,5], leading to the greatly improved strength and the hardness of these composites. In addition to these materials, alumina (Al 2 O 3 ) is one of the most important ceramic reinforcements that has relatively high melting (2054 °C) and boiling points (2980 °C), ultrahigh thermal stability, and mechanical strength.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the Microstructure and Mechanical Properties of Copper-Graphite Composites Reinforced with Single-Crystal α-Al2O3 Fibres by Hot Isostatic Pressing

Zhang

Jiang

Qiao³

et al. 2018

Materials

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Single-crystal α-Al2O3 fibres can be utilized as a novel reinforcement in high-temperature composites owing to their high elastic modulus, chemical and thermal stability. Unlike non-oxide fibres and polycrystalline alumina fibres, high-temperature oxidation and polycrystalline particles boundary growth will not occur for single-crystal α-Al2O3 fibres. In this work, single-crystal α-Al2O3 whiskers and Al2O3 particles synergistic reinforced copper-graphite composites were fabricated by mechanical alloying and hot isostatic pressing techniques. The phase compositions, microstructures, and fracture morphologies of the composites were investigated using X-ray diffraction, a scanning electron microscope equipped with an X-ray energy-dispersive spectrometer (EDS), an electron probe microscopic analysis equipped with wavelength-dispersive spectrometer, and a transmission electron microscope equipped with EDS. The mechanical properties have been measured by a micro-hardness tester and electronic universal testing machine. The results show that the reinforcements were unevenly distributed in the matrix with the increase of their content and there were some micro-cracks located at the interface between the reinforcement and the matrix. With the increase of the Al2O3 whisker content, the compressive strength of the composites first increased and then decreased, while the hardness decreased. The fracture and strengthening mechanisms of the composite materials were explored on the basis of the structure and composition of the composites through the formation and function of the interface. The main strengthening mechanism in the composites was fine grain strengthening and solid solution strengthening. The fracture type of the composites was brittle fracture.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of the Microstructure and Mechanical Properties of Copper-Graphite Composites Reinforced with Single-Crystal α-Al2O3 Fibres by Hot Isostatic Pressing

Zhang

Jiang

Qiao³

et al. 2018

Materials

Self Cite

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“…The thermodynamic analysis of the possible reactions can be analyzed through the following reactions during the sintering process of composites [11]: …”

Section: Resultsmentioning

confidence: 99%

“…The Gibbs free energy of reaction (1) in which Ti 3 SiC 2 is decomposed can be calculated as: Δ r G m = ∑ ν B Δ f G m = ‐ 106.52kJ/mol < 0 indicating that the reaction can occur [11]. For reaction (2), the Gibbs free energy of the reaction can be calculated as: (4) − (3) = (2), and the Δ r Gm of the reaction (2) is − 66.99 kJ/mol.…”

Section: Resultsmentioning

confidence: 99%

“…One-dimensional multi-walled carbon nanotubes (MWCNTs) and two-dimensional graphene are attractive materials for composite reinforcement due to their unique structure and performance [8–10] and are being used in place of graphite to prepare metal matrix composites [11–13]. Nevertheless, the performances of copper matrix composites made from MWCNTs or graphene remain insufficient.…”

Section: Introductionmentioning

confidence: 99%

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Synergetic Effect of Graphene and MWCNTs on Microstructure and Mechanical Properties of Cu/Ti3SiC2/C Nanocomposites

et al. 2017

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Multi-walled carbon nanotubes (MWCNTs) and graphenes have been taken for novel reinforcements due to their unique structure and performance. However, MWCNTs or graphenes reinforced copper matrix composites could not catch up with ideal value due to reinforcement dispersion in metal matrix, wettability to metal matrix, and composite material interface. Taking advantage of the superior properties of one-dimensional MWCNTs and two-dimensional graphenes, complementary performance and structure are constructed to create a high contact area between MWCNTs and graphenes to the Cu matrix. Mechanical alloying, hot pressing, and hot isostatic pressing techniques are used to fabricate Cu matrix self-lubricating nanocomposites. Effects of MWCNTs and graphenes on mechanical properties and microstructures of Cu/Ti3SiC2/C nanocomposites are studied. The fracture and strengthening mechanisms of Cu/Ti3SiC2/C nanocomposites are explored on the basis of structure and composition of Cu/Ti3SiC2/C nanocomposites with formation and function of interface.

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Improving sintering behavior of MWCNT/BaTiO3 ceramic nanocomposite with Bi2O3-B2O3 addition

Tohidifar

2018

Ceramics International

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Microstructures and mechanical properties of Cu/Ti3SiC2/C/MWCNTs composites prepared by vacuum hot-pressing sintering

Cited by 30 publications

References 15 publications

Investigation of the Microstructure and Mechanical Properties of Copper-Graphite Composites Reinforced with Single-Crystal α-Al2O3 Fibres by Hot Isostatic Pressing

Investigation of the Microstructure and Mechanical Properties of Copper-Graphite Composites Reinforced with Single-Crystal α-Al2O3 Fibres by Hot Isostatic Pressing

Synergetic Effect of Graphene and MWCNTs on Microstructure and Mechanical Properties of Cu/Ti3SiC2/C Nanocomposites

Improving sintering behavior of MWCNT/BaTiO3 ceramic nanocomposite with Bi2O3-B2O3 addition

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