Sintering effect on microstructural evolution and mechanical properties of spark plasma sintered Ti matrix composites reinforced by reduced graphene oxides

Dong, Longlong; Xiao, Bing; Liu, Y.; Li, Yuli; Fu, Yong Qing; Zhang, Yongqing; Zhang, Y.S.

doi:10.1016/j.ceramint.2018.06.252

Cited by 67 publications

(25 citation statements)

References 37 publications

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“…Thus, TiC is formed in situ by the reaction between Ti and C during sintering, which is consistent with the aforementioned SEM and TEM results. A similar occurrence was observed by Dong et al [28]. The intensity of TiC increases with an increase in GO content.…”

Section: Resultssupporting

confidence: 88%

Microstructure and Mechanical Properties of Graphene Oxide-Reinforced Titanium Matrix Composites Synthesized by Hot-Pressed Sintering

Liu

et al. 2019

Nanoscale Res Lett

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Ti matrix composites reinforced with 1–5 wt% graphene oxide (GO) were prepared by hot-pressed sintering in argon atmosphere. The effect of sintering temperature on the microstructures and mechanical properties of the composite was also evaluated. The results show that TiC nanoparticles were formed in situ as interfacial products via the reaction between Ti and GO during sintering. With increases in GO content and sintering temperature, the amount of TiC increased, improving the mechanical properties of the composites. GO was also partly retained with a lamellar structure after sintering. The composite reinforced with 5 wt% GO exhibited a hardness of 457 HV, 48.4% higher than that of pure Ti at 1473 K. The Ti-2.5 wt% GO composite sintered at 1473 K achieved a maximum yield stress of 1294 MPa, which was 62.7 % higher than that of pure Ti. Further increasing the GO content to 5 wt% led to a slight decrease in yield stress owing to GO agglomeration. The fracture morphology of the composite reinforced with GO exhibited a quasi-cleavage fracture, whereas that of the pure Ti matrix showed a ductile fracture. The main strengthening mechanism included grain refinement, solution strengthening, and dispersion strengthening of TiC and GO.

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Section: Resultssupporting

confidence: 88%

Microstructure and Mechanical Properties of Graphene Oxide-Reinforced Titanium Matrix Composites Synthesized by Hot-Pressed Sintering

Liu

et al. 2019

Nanoscale Res Lett

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“…Therefore, it is potential to prepare the mixed powder with GO uniform dispersion by solution mixing method, which can avoid the damage of graphene structure. Dong et al [ 24 ] discovered that GO sheets effectively absorbed on the surfaces of spherical Ti particles by mechanically stirring GO and pure Ti powder in water. Our previous study also suggested that the agglomeration and structural damage of GO can be avoided by mixing GO and titanium alloy powder in anhydrous ethanol [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

“…However, graphene-reinforced Ti-matrix composites are mainly focused on pure Ti [ 16 , 17 , 18 , 19 , 20 , 24 ], Ti6Al4V [ 26 , 27 , 28 ] and TiAl [ 29 ] so far. Very little attention was paid on the influence of graphene or GO on microstructure and mechanical properties (especially tensile properties at high temperature) of high-temperature titanium alloys, which have complex microstructure evolution and high initial strength because of numerous solid solution elements.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Tensile Properties of Graphene-Oxide-Reinforced High-Temperature Titanium-Alloy-Matrix Composites

Chen

et al. 2020

Materials

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In this study, graphene-oxide (GO)-reinforced Ti–Al–Sn–Zr–Mo–Nb–Si high-temperature titanium-alloy-matrix composites were fabricated by powder metallurgy. The mixed powders with well-dispersed GO sheets were obtained by temperature-controlled solution mixing, in which GO sheets adsorb on the surface of titanium alloy particles. Vacuum deoxygenating was applied to remove the oxygen-containing groups in GO, in order to reduce the introduction of oxygen. The compact composites with refined equiaxed and lamellar α phase structures were prepared by hot isostatic pressing (HIP). The results show that in-situ TiC layers form on the surface of GO and GO promotes the precipitation of hexagonal (TiZr)6Si3 particles. The composites exhibit significant improvement in strength and microhardness. The room-temperature tensile strength, yield strength and microhardness of the composite added with 0.3 wt% GO are 9%, 15% and 27% higher than the matrix titanium alloy without GO, respectively, and the tensile strength and yield strength at 600 °C are 3% and 21% higher than the matrix alloy. The quantitative analysis indicates that the main strengthening mechanisms are load transfer strengthening, grain refinement and (TiZr)6Si3 s phase strengthening, which accounted for 48%, 30% and 16% of the improvement of room-temperature yield strength, respectively.

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“…In the case of nano-powders, which suffer from extensive grain growth during conventional sintering, SPS is particularly suitable for the consolidating of the powders. In the literature, several works have been devoted to fabricating graphene-reinforced nanocomposites by the SPS process [143,144,145].…”

Section: Fabrication Of Mmncs Reinforced By Graphenementioning

confidence: 99%

An Overview of the Recent Developments in Metal Matrix Nanocomposites Reinforced by Graphene

2019

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Two-dimensional graphene plateletes with unique mechanical, electrical and thermo-physical properties could attract more attention for their employed as reinforcements in the production of new metal matrix nanocomposites (MMNCs), due to superior characteristics, such as being lightweight, high strength and high performance. Over the last years, due to the rapid advances of nanotechnology, increasing demand for the development of advanced MMNCs for various applications, such as structural engineering and functional device applications, has been generated. The purpose of this work is to review recent research into the development in the powder-based production, property characterization and application of magnesium, aluminum, copper, nickel, titanium and iron matrix nanocomposites reinforced with graphene. These include a comparison between the properties of graphene and another well-known carbonaceous reinforcement (carbon nanotube), following by powder-based processing strategies of MMNCs above, their mechanical and tribological properties and their electrical and thermal conductivities. The effects of graphene distribution in the metal matrices and the types of interfacial bonding are also discussed. Fundamentals and the structure–property relationship of such novel nanocomposites have also been discussed and reported.

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Sintering effect on microstructural evolution and mechanical properties of spark plasma sintered Ti matrix composites reinforced by reduced graphene oxides

Abstract: Ti matrix composites reinforced with 0.6 wt.% reduced graphene oxide (rGO)

Cited by 67 publications

References 37 publications

Microstructure and Mechanical Properties of Graphene Oxide-Reinforced Titanium Matrix Composites Synthesized by Hot-Pressed Sintering

Microstructure and Mechanical Properties of Graphene Oxide-Reinforced Titanium Matrix Composites Synthesized by Hot-Pressed Sintering

Microstructure and Tensile Properties of Graphene-Oxide-Reinforced High-Temperature Titanium-Alloy-Matrix Composites

An Overview of the Recent Developments in Metal Matrix Nanocomposites Reinforced by Graphene

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