Thermal and Mechanical Properties of Graphene–Titanium Composites Synthesized by Microwave Sintering

Yang, Wenzhi; Huang, Wei‐Ming; Wang, Zhifeng; Shang, Fei; Huang, Wei; Zhang, Bao-Yu

doi:10.1007/s40195-016-0445-7

Cited by 41 publications

(24 citation statements)

References 23 publications

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“…Furthermore, thermodynamic analysis (∆G < 0) revealed that the reaction (Equation(7)) could be carried out when the temperature was higher than 720 °C [ 38 ]. Based on the result of the XRD ( Figure 4 ) and TEM ( Figure 8 ), Equations (8) and (9) are the chemical reactions in this study which have been inferred from literatures [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 ]. Additionally, Ti x P y detected by XRD ( Figure 4 ) was formed by the reaction between titanium and phosphorus which was derived from Equations (10) to (11).…”

Section: Discussionmentioning

confidence: 81%

“…Xu et al found that although the lubricating property of MLG would disappear when the temperature was higher than 600 °C, the MLG had higheroxygen resistance due to the closed grain boundary, inhibiting the flow of oxygen from the grain boundary [ 25 ]. However, in general, the dispersion and integrity of graphene in composites still remain a problem to be solved [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and Mechanical Properties of Graphene-Reinforced Titanium Matrix/Nano-Hydroxyapatite Nanocomposites

Jiang

Shao

et al. 2018

Materials

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Biomaterial composites made of titanium and hydroxyapatite (HA) powder are among the most important biomedicalmaterials due to their good mechanical properties and biocompatibility. In this work, graphene-reinforced titanium matrix/nano-hydroxyapatite nanocomposites were prepared by vacuum hot-pressing sintering. The microstructure and mechanical properties of graphene-reinforced titanium matrix/nano-hydroxyapatite nanocomposites with different graphene content were systematically investigated. Microstructures of the nanocomposites were examined by X-ray diffraction (XRD), back scattered electron imaging (BSE), scanning electron microscope (SEM) equipped with energy dispersive spectrometer (EDS), electron probe microanalyzer (EPMA), and transmission electron microscope (TEM). The mechanical properties were determined from microhardness, shear strength, and compressive strength. Results showed that during the high-temperature sintering process, complex chemical reactions occurred, resulting in new phases of nucleation such as Ca3(PO4)2, TixPy, and Ti3O.The new phases, which easily dropped off under the action of external force, could hinder the densification of sintering and increase the brittleness of the nanocomposites. Results demonstrated that graphene had an impact on the microstructure and mechanical properties of the nanocomposites. Based on the mechanical properties and microstructure of the nanocomposites, the strengthening and fracture mechanisms of the graphene-reinforced titanium matrix/nano-hydroxyapatite nanocomposites with different graphene content were analyzed.

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Section: Discussionmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Graphene-Reinforced Titanium Matrix/Nano-Hydroxyapatite Nanocomposites

Jiang

Shao

et al. 2018

Materials

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“…It was revealed that both CNTs-HA and graphene sheet-HA composites are ideal materials for bone tissue engineering scaffolds and beneficial to the proliferation and differentiation of human fetal osteoblastic cell line (hFOB 1.19) [ 23 ]. Yang et al found that compressive strength of graphene-Ti composites improve with the addition of an appropriate amount of graphene, which is also partly due to the enhancement effect of graphene itself [ 24 ]. However, the agglomeration of graphene occurred around some pores present on the surface of the composite [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

“…Yang et al found that compressive strength of graphene-Ti composites improve with the addition of an appropriate amount of graphene, which is also partly due to the enhancement effect of graphene itself [ 24 ]. However, the agglomeration of graphene occurred around some pores present on the surface of the composite [ 24 ]. On the other hand, an appropriate amount of CNTs and GNFs have synergistic enhancement effects due to their unique structure [ 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Nano-Carbon Reinforced Titanium Matrix/Hydroxyapatite Biocomposites Prepared by Spark Plasma Sintering

Jiang

Shao

et al. 2018

Nanomaterials

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Nano-carbon reinforced titanium matrix/hydroxyapatite (HA) biocomposites were successfully prepared by spark plasma sintering (SPS). The microstructure, mechanical properties, biocompatibility, and the relationship between microstructure and properties of biocomposites were systematically investigated. Results showed there are some new phases in sintered composites, such as β-Ti, TiO3, ZrO2, etc. Moreover, a small amount of Ti17P10, CaTiO3, Ca3(PO4)2 were also detected. The reaction that may occur during the preparation process is suppressed to some extent, which is because that the addition of second phases can prevent the direct contact of titanium with HA and reduce the contact areas. Transmission electron microscope (TEM) analysis proved the existence of elemental diffusion and chemical reactions in sintered composites. Compared with results of composites prepared by hot-pressed sintering before, mechanical properties (microhardness, compressive strength, and shear strength) of 0.5-GNFs composites prepared by SPS were increased by about 2.8, 4.8, and 4.1 times, respectively. The better mechanical properties of 0.5-GNFs composite in nano-carbon reinforced composites are mainly due to the lower degree of agglomeration of tubular carbon nanotubes (CNTs) compared to lamellar graphene nanoflakes (GNFs). Moreover, the strengthening and toughening mechanisms of nano-carbon reinforced titanium alloy/HA biocomposite prepared by spark plasma sintering (SPS) mainly included second phase strengthening, grain refinement strengthening, solution strengthening, graphene extraction, carbon nanotubes bridging, crack tail stripping, etc. In addition, in vitro bioactivity test revealed that the addition of nano-carbon was beneficial to promote the adhesion and proliferation of cells on the surface of titanium alloy/HA composite, because nano-carbon can enhance the formation of mineralized necks in the composites after transplantation, stimulate biomineralization and promote bone regeneration.

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“…MCrAlY (M = Co or/and Ni) coatings prepared by thermal spraying technique have been diffusely used in the industries of nuclear power, aerospace and automotive owing to the excellent high-temperature corrosion and oxidation resistance and it could withstand the high thermal and mechanical loads due to possessing excellent high-temperature self-lubricating properties [1][2][3][4][5][6]. Graphite and molybdenum disulfide usually acted as solid lubricants could improve the tribological properties of the composites [7][8][9][10][11][12][13][14][15]. But this kind of solid lubricants would be oxidized or decomposed above 500°C, and therefore lose their lubricating effects [16].…”

Section: Introductionmentioning

confidence: 99%

Influence of Silver Contents on the Tribological Properties of Ni-Based Self-Lubricating Coatings by Atmospheric Plasma Spraying

Jia

Gao

et al. 2017

Acta Metall. Sin. (Engl. Lett.)

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The NiCrAlY-Mo-Ag composite coatings were prepared by atmospheric plasma spraying. The tribological properties of the composite coatings were investigated from 25 to 900°C in details. The tribo-layer formed on the worn surface of the composite coatings and influenced the tribological properties at different temperatures. The addition of silver could effectively decrease the friction coefficient and wear rate of the coatings at the wide range of temperature. The rubbing process could form the nickel molybdate and promote the formation of silver molybdate within the worn surfaces at high temperature. The synergistic lubricating effects of nickel molybdate and silver molybdate are attributed to the improvement of the tribological properties of coatings at high temperature.

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Thermal and Mechanical Properties of Graphene–Titanium Composites Synthesized by Microwave Sintering

Cited by 41 publications

References 23 publications

Microstructure and Mechanical Properties of Graphene-Reinforced Titanium Matrix/Nano-Hydroxyapatite Nanocomposites

Microstructure and Mechanical Properties of Graphene-Reinforced Titanium Matrix/Nano-Hydroxyapatite Nanocomposites

Microstructure and Mechanical Properties of Nano-Carbon Reinforced Titanium Matrix/Hydroxyapatite Biocomposites Prepared by Spark Plasma Sintering

Influence of Silver Contents on the Tribological Properties of Ni-Based Self-Lubricating Coatings by Atmospheric Plasma Spraying

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