Facile synthesis of homogeneously dispersed carbon nanotubes on TC4 alloy powder by in-situ CVD and its growth behavior

Lin, Bin; Chen, Xiaotang; Chen, J.; Chen, Shujian; Lu, Ruihan; Liang, Siyan; Cui, Xiping; Chi, Haitao; Zou, Linchi

doi:10.1016/j.jmrt.2023.05.127

Cited by 10 publications

(3 citation statements)

References 46 publications

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“…The peaks at 1308 cm −1 and 1596 cm −1 for the Ti metal-2 and 1344 cm −1 and 1601 cm −1 for the Ti alloy-2 ( Table 3 ) can be assigned to the D and G peaks of CNTs [ 20 , 31 ]. The shapes of the D and G peaks demonstrated the presence of well-structured CNTs [ 51 ]. The intensity ratio of the D to G band (I D /I G ) was 0.84 and 0.76 for the Ti metal-2 and Ti alloy-2, respectively ( Table 3 ).…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the CNTs on the titanium alloy surface were characterized by fewer defects than that on the pure Ti metal. The G′ band (or 2D band [ 50 ]) was less sensitive to sample defects, but, together with the G-band, the graphitic structure of the CNTs was confirmed [ 20 , 51 ]. In graphene, this band appears as a strong single peak, while in other carbon structures, the shape is modified and broadened [ 50 ].…”

Section: Resultsmentioning

confidence: 99%

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Morphology and Structure of TiO2 Nanotube/Carbon Nanostructure Coatings on Titanium Surfaces for Potential Biomedical Application

Dikova,

Hashim,

Mintcheva

2024

Materials

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Titanium is the most used material for implant production. To increase its biocompatibility, continuous research on new coatings has been performed by the scientific community. The aim of the present paper is to prepare new coatings on the surfaces of the pure Ti Grade 2 and the Ti6Al4V alloy. Three types of coatings were achieved by applying anodization and chemical vapor deposition (CVD) methods: TiO2 nanotubes (TNTs) were formed by anodization, carbon nanotubes (CNTs) were obtained through a metal-catalyst-free CVD process, and a bilayer coating (TiO2 nanotubes/carbon nanostructures) was prepared via successive anodization and CVD processes. The morphology and structure of the newly developed coatings were characterized using SEM, EDX, AFM, XRD, and Raman spectroscopy. It was found that after anodization, the morphology of the TiO2 layer on pure Ti consisted of a “sponge-like” structure, nanotubes, and nano-rods, while the TNTs layer on the Ti alloy comprised mainly nanotubes. The bilayer coatings on both materials demonstrated different morphologies: the pure Ti metal was covered by a layer of nanotubular and nano-rod TiO2 structures, followed by a dense carbon layer decorated with carbon nanoflakes, and on the Ti alloy, first, a TNTs layer was formed, and then carbon nano-rods were deposited using the CVD method.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Morphology and Structure of TiO2 Nanotube/Carbon Nanostructure Coatings on Titanium Surfaces for Potential Biomedical Application

Dikova,

Hashim,

Mintcheva

2024

Materials

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“…Currently, CVD is the preferred process for the synthesis of MWCNTs at the industrial level due to its good scalability. 22 The amount of the catalyst used is one of the most important factors that affects the yield of MWCNTs. 23 However, the drawbacks of CVD methods include high costs due to more energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Facile microwave synthesis of multi‐walled carbon nanotubes for modification of elastomer used as heaters

Ali,

Shchegolkov,

Shchegolkov

et al. 2023

Polymer Engineering & Sci

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Multi‐walled carbon nanotubes (MWCNTs) were synthesized by a microwave method. MWCNTs had filamentous shapes (10 μm) and were intertwined in bundles (40–60 nm diameter). The rapid oxidation of MWCNTs with a loss of 90% of weight was observed from 530 to 630°C. 2% Residue was present at 630°C, which gradually decreased to 1.2% at 1000°C. In a silicone elastomer, increased thermal conductivity at a concentration of 8% MWCNTs was observed. The highest thermal conductivity of the nano‐modified elastomer was 0.48 W/m°C with 8.0 wt% MWCNTs. The highest electrical conductivity was 2.4 × 10−5 S cm−1 at 8.0 wt% MWCNTs. Both the thermal and electrical conductivities showed percolation behavior with the percolation thresholds at 6 and 5 wt%, respectively. The MWCNTs synthesized by microwave method gave a good power economy in comparison to MWCNTs obtained by chemical vapor deposition (CVD) on NiMg catalyst. Microwave‐synthesized MWCNTs showed high stability at a potential of 250 V in an electrical resistance heater application due to the presence of Fe on the surface of MWCNTs. The developed heater can effectively operate at 220 V, which enables the use of the tubes in household appliances, such as heat fans, irons, and washing machines.Highlights Synthesis of MWCNTs by microwave plasma treatment of ferrocene and graphite. Characterization of MWCNTs by different techniques. Concentration dependence of electro‐ and thermal conductivity of MWCNTs in elastomers. Electro‐physical parameters studies of elastomers modified with MWCNTs. Heat generation studies in elastomeric matrix with MWCNTs.

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Carbon nanotubes/graphene-based nanofluids

Fakharshakeri,

Mhaibes,

Safardoust-Hojaghan

2024

Nanofluids

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Facile synthesis of homogeneously dispersed carbon nanotubes on TC4 alloy powder by in-situ CVD and its growth behavior

Cited by 10 publications

References 46 publications

Morphology and Structure of TiO2 Nanotube/Carbon Nanostructure Coatings on Titanium Surfaces for Potential Biomedical Application

Morphology and Structure of TiO2 Nanotube/Carbon Nanostructure Coatings on Titanium Surfaces for Potential Biomedical Application

Facile microwave synthesis of multi‐walled carbon nanotubes for modification of elastomer used as heaters

Carbon nanotubes/graphene-based nanofluids

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