Reduced Graphene Oxide Reinforced 7075 Al Matrix Composites: Powder Synthesis and Mechanical Properties

Sun, Youhong; Zhang, Chi; Лиу, Баочанг; Meng, Qingnan; Ma, Shaoming; Dai, Wenhao

doi:10.3390/met7110499

Cited by 25 publications

(10 citation statements)

References 34 publications

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“…Meanwhile, SEM images for bending fracture surface show that wider interfacial gap is observed between uncoated diamond and aluminum matrix. The separation between diamond and aluminum is caused during the cooling process by the large difference in expansion coefficients between aluminum (23.0 × 10 −6 K −1 29 ) and carbon materials (1.0 × 10 −6 K −1 27 ). Therefore, the low density for uncoated diamond/Al composites is attributed to large amounts of wide gap around diamond particles.…”

Section: Discussionmentioning

confidence: 99%

Enhanced bending strength and thermal conductivity in diamond/Al composites with B4C coating

Sun

Zhang

et al. 2018

Sci Rep

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Diamond/Al composites containing B4C-coated and uncoated diamond particles were prepared by powder metallurgy. The microstructure, bending strength and thermal conductivity were characterized considering the B4C addition and diamond fraction. The influence of B4C coating and fraction of diamond on both bending strength and thermal conductivity were investigated. The bending strength increased with decreasing diamond fraction. Moreover, addition of B4C coating led to an obvious increase in bending strength. The peak value at 261.2 MPa was achieved in the composite with 30 vt.% B4C-coated diamond particles, which was about twice of that for 30 vt.% uncoated diamond/Al composite (140.1 MPa). The thermal conductivity enhanced with the increase in diamond fraction, and the highest value (352.7 W/m·K) was obtained in the composite with 50 vt.% B4C-coated diamond particles. Plating B4C on diamond gave rise to the enhancement in bending strength and thermal conductivity for diamond/Al composites, because of the improvement of the interfacial bonding between diamond and aluminum matrix.

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Section: Discussionmentioning

confidence: 99%

Enhanced bending strength and thermal conductivity in diamond/Al composites with B4C coating

Sun

Zhang

et al. 2018

Sci Rep

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“…The phase constituents of samples were identified by X-ray diffraction (XRD, D/Max 2500 PC, Tokyo, Japan) using Cu Kα radiation in step mode from 20 • to 80 • . The density of SCFs/2024 Al was measured through Archimedes' principle [36]. The specimens for the tensile test were prepared in accordance with ASTM Standard E-8/E8M-09 with a 10 mm gauge length.…”

Section: Methodsmentioning

confidence: 99%

“…where σ CF is the stress carbon fiber suffered in radial direction, α CF and α m is the thermal expansion coefficient of carbon fiber in radial direction (7.2 × 10 −6 K −1 [35]) and aluminum matrix (23.6 × 10 −6 K −1 [36]), ∆T is the difference between sintering temperature and room temperature, and E CF is the modulus of carbon fiber. Due to the residual stress, the carbon fiber in composites are subjected to compressive stress, as α CF is much smaller than α m .…”

Section: Appl Sci 2019 9 X For Peer Review 7 Of 14mentioning

confidence: 99%

The Evolution of Interfacial Microstructure and Fracture Behavior of Short Carbon Fiber Reinforced 2024 Al Composites at High Temperature

Zhang

Meng

et al. 2019

Applied Sciences

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The short carbon fiber reinforced 2024 Al composites were fabricated through powder metallurgy. The effect of short carbon fiber content on the interfacial microstructure and fracture behavior of the composites at different temperatures were investigated. The results showed that the dislocation accumulation was formed in the aluminum matrix due to the thermal expansion mismatch between carbon fiber and aluminum matrix. With the testing temperature increasing, the size of interfacial product Al4C3 and precipitates Al2Cu became larger, and the segregation of Al2Cu was found coarsening around Al4C3. The addition of short carbon fiber improved the hardness and modulus of the aluminum matrix in the vicinity of the interface between carbon fiber and aluminum matrix. Compared to the matrix 2024 Al, the yield strength and ultimate tensile strength of the composites first increased and then decreased with increasing short carbon fiber content at room temperature 423 Kand 523 K. The fracture surface of the composites at room temperature was characterized by shear failure of fiber, while the interface debonding and fiber pulled-out became predominant fracture morphologies for the fracture surface at increased temperatures.

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“…Al matrix composites, prepared with SiC and Al 2 O 3 particle reinforcement, exhibit higher specific strength and modulus, fracture toughness, fatigue behavior, wear and corrosion resistance than the corresponding monolithic alloys. To further improve their mechanical properties, other types of reinforcements such as carbon nanotubes (CNTs) and graphene nano-sheets have been recently investigated [48][49][50]. If compared to the conventional reinforcements, CNTs and graphene are stronger and provide better damping and lower thermal expansion.…”

Section: Aluminum Compositesmentioning

confidence: 99%

Alloys for Aeronautic Applications: State of the Art and Perspectives

Gloria

Montanari

Richetta

et al. 2019

Metals

153

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In recent years, a great effort has been devoted to developing a new generation of materials for aeronautic applications. The driving force behind this effort is the reduction of costs, by extending the service life of aircraft parts (structural and engine components) and increasing fuel efficiency, load capacity and flight range. The present paper examines the most important classes of metallic materials including Al alloys, Ti alloys, Mg alloys, steels, Ni superalloys and metal matrix composites (MMC), with the scope to provide an overview of recent advancements and to highlight current problems and perspectives related to metals for aeronautics. Horizontal stabilizersLower Compression CYS, E, DT Upper Tension DT, YS As shown in Figure 2, engines consist of cold (fan, compressor and casing) and hot (combustion chamber and turbine) sections. The material choice depends on the working temperature. The components of cold sections require materials with high specific strength and corrosion resistance. Ti and Al alloys are very good for these applications. For instance, the working temperature of the compressor is in the range of 500-600 °C, and the Ti-6Al-2Sn-4Zr-6Mo alloy (YS = 640 MPa at 450 °C; excellent corrosion resistance) is the most commonly used material.For the hot sections, materials with good creep resistance, mechanical properties at high temperature and high-temperature corrosion resistance are required, and Ni-base superalloys are the optimal choice.

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Reduced Graphene Oxide Reinforced 7075 Al Matrix Composites: Powder Synthesis and Mechanical Properties

Cited by 25 publications

References 34 publications

Enhanced bending strength and thermal conductivity in diamond/Al composites with B4C coating

Enhanced bending strength and thermal conductivity in diamond/Al composites with B4C coating

The Evolution of Interfacial Microstructure and Fracture Behavior of Short Carbon Fiber Reinforced 2024 Al Composites at High Temperature

Alloys for Aeronautic Applications: State of the Art and Perspectives

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