Acquiring well balanced strength and ductility of Cu/CNTs composites with uniform dispersion of CNTs and strong interfacial bonding

2018 ◽  
Vol 733 ◽  
pp. 144-152 ◽  
Author(s):  
Xinhua Wang ◽  
Baisong Guo ◽  
Song Ni ◽  
Jianhong Yi ◽  
Min Song
Keyword(s):  
Interfacial Bonding ◽  
Uniform Dispersion ◽  
Strong Interfacial Bonding ◽  
Strength And Ductility

Enhanced electromagnetic interference shielding behavior of Graphene Nanoplatelet/Ni/Wax nanocomposites

2017 ◽  
Vol 5 (26) ◽  
pp. 6471-6479 ◽  
Author(s):  
Hye Ji Im ◽  
Gwang Hoon Jun ◽  
Dong Ju Lee ◽  
Ho Jin Ryu ◽  
Soon Hyung Hong
Keyword(s):  
Electromagnetic Interference ◽  
Molecular Level ◽  
Interfacial Bonding ◽  
Ni Nanoparticles ◽  
Mixing Process ◽  
Shielding Effectiveness ◽  
Electromagnetic Interference Shielding ◽  
Graphene Nanoplatelet ◽  
Strong Interfacial Bonding

GNP/Ni/Wax nanocomposites fabricated by a molecular-level mixing process show enhanced shielding effectiveness due to homogeneously decorated Ni nanoparticles on GNP with strong interfacial bonding.

scholarly journals Microstructure, microhardness, and tensile properties of hot-rolled Al6061/TiB2/CeO2 hybrid composites

2021 ◽  
Vol 121 (10) ◽  
pp. 1-6
Author(s):  
S. Iyengar ◽  
D. Sethuram ◽  
R. Shobha ◽  
P.G. Koppad
Keyword(s):  
Tensile Strength ◽  
Tensile Properties ◽  
Hybrid Composites ◽  
Base Alloy ◽  
Interfacial Bonding ◽  
Uniform Dispersion ◽  
Al6061 Alloy ◽  
Ceo2 Particle ◽  
Hot Rolled ◽  
Scanning Electron

T1B2 and CeO2 particle-reinforced A16061 hybrid composites were manufactured using stir casting and hot rolling techniques. The base alloy and composites were hot-rolled at 500°C and a 50% reduction was achieved through 12 passes. The effect of varying TB2 and CeO2 particle additions on the microstructure and mechanical properties of the Al6061 matrix was studied. Scanning electron microscopy showed uniform dispersion of both the reinforcements, with good interfacial bonding. Microhardness and tensile properties like yield and tensile strength were found to be higher for hybrid composite with 2.5% TiB2 and 2.5% CeO2 compared to Al6061 alloy and other hybrid composites. The increased tensile strength is attributed to good dispersion and interfacial bonding between the particles and Al6061 matrix. Fracture analysis using a scanning electron microscope revealed ductile fracture for the Al6061 alloy and mixed characteristics of ductile-brittle fracture for hybrid composites.

scholarly journals Electrochemical Enantiomer Recognition Based on sp3-to-sp2 Converted Regenerative Graphene/Diamond Electrode

Nanomaterials ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 1050 ◽  
Author(s):  
Jingyao Gao ◽  
Haoyang Zhang ◽  
Chen Ye ◽  
Qilong Yuan ◽  
Kuan Chee ◽  
...  
Keyword(s):  
Casting Process ◽  
Interfacial Bonding ◽  
Pharmacological Activities ◽  
Significant Potential ◽  
Diamond Electrode ◽  
Sensing Platform ◽  
Strong Interfacial Bonding ◽  
Half Minute

It is of great significance to distinguish enantiomers due to their different, even completely opposite biological, physiological and pharmacological activities compared to those with different stereochemistry. A sp3-to-sp2 converted highly stable and regenerative graphene/diamond electrode (G/D) was proposed as an enantiomer recognition platform after a simple β-cyclodextrin (β-CD) drop casting process. The proposed enantiomer recognition sensor has been successfully used for d and l-phenylalanine recognition. In addition, the G/D electrode can be simply regenerated by half-minute sonication due to the strong interfacial bonding between graphene and diamond. Therefore, the proposed G/D electrode showed significant potential as a reusable sensing platform for enantiomer recognition.

scholarly journals Enhancing Interfacial Bonding and Tensile Strength in CNT-Cu Composites by a Synergetic Method of Spraying Pyrolysis and Flake Powder Metallurgy

Materials ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 670 ◽  
Author(s):  
Xiangyang Chen ◽  
Rui Bao ◽  
Jianhong Yi ◽  
Dong Fang ◽  
Jingmei Tao ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Powder Metallurgy ◽  
Mass Fraction ◽  
Critical Value ◽  
Interfacial Bonding ◽  
Matrix Composites ◽  
Interface Characterization ◽  
Uniform Dispersion ◽  
The Matrix ◽  
Flake Powder Metallurgy

Carbon nanotube (CNT)-reinforced metal matrix composites (MMCs) face the problems of dispersion and interfacial wetting with regard to the matrix. A synergetic method of spray pyrolysis (SP) and flake powder metallurgy (FPM) is used in this paper to improve the dispersibility and interfacial bonding of CNTs in a Cu matrix. The results of the interface characterization show interface oxygen atoms (in the form of Cu2O) and a high density of dislocation areas, which is beneficial for interfacial bonding. The tensile results show that the tensile strength of the SP-CNT-Cu composites is much higher than that of the CNT-Cu composites when the mass fraction of the CNTs does not reach the critical value. This can be explained by the nanoparticles which are found on the surface of the CNTs during the SP process. These nanoparticles not only increase the tensile strength of the SP-CNT-Cu composites but also improve the dispersion of the CNTs in the Cu matrix. Thereby, uniform dispersion of CNTs, interfacial bonding between CNTs and the Cu matrix, and the enhancement of tensile strength are achieved simultaneously by the synergetic method.

Effects of Sintering Temperature on Microstructure and Wear Properties of Al2O3 Particle Reinforced Al Composites

2015 ◽  
Vol 1095 ◽  
pp. 16-19
Author(s):  
Tian Guo Wang ◽  
Qun Qin ◽  
Qi Chao Liang
Keyword(s):  
Sintering Temperature ◽  
Interfacial Bonding ◽  
Tribological Characteristic ◽  
Wear Properties ◽  
High Relative Density ◽  
Powder Metallurgy Process ◽  
Higher Temperature ◽  
Strong Interfacial Bonding ◽  
Metallurgy Process ◽  
Poor Interfacial Bonding

Al2O3 particle reinforced aluminum composites were prepared by powder metallurgy process. The effects of sintering temperature on microstructure and tribological characteristic were investigated with the combination of experimental results and theoretical analysis. The composite sintered at 550 oC shows high relative density and strong interfacial bonding, whereas the composites sintered at lower and higher temperature indicate no interfacial bonding and poor interfacial bonding, respectively. The surface morphology observed by scanning electron microscopy (SEM) indicated that the grains of the Al-based composites sintered at 550 oC were uniform and compact, which were in agreement with the properties of high density and tribological properties.

scholarly journals High-Strength GO/PA66 Nanocomposite Fibers via In Situ Precipitation and Polymerization

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1688
Author(s):  
Ao Gu ◽  
Jian Wu ◽  
Liming Shen ◽  
Xiaoyan Zhang ◽  
Ningzhong Bao
Keyword(s):  
High Performance ◽  
Melt Spinning ◽  
In Situ Polymerization ◽  
High Strength ◽  
Interfacial Bonding ◽  
Polymerization Process ◽  
Precipitation Process ◽  
Uniform Dispersion ◽  
Nanocomposite Fibers

The uniform dispersion of graphene oxide (GO) and strong interfacial bonding are the key factors in achieving the high mechanical strength of GO/polymer composites. It is still challenging to prepare GO/PA66 composites with uniform GO dispersion by the in situ polymerization method. In this paper, we prepare GO/PA66 salt nanocomposite by in situ precipitating PA66 salt with GO in ethanol. The GO/PA66 nanocomposite fibers are then fabricated using the as-prepared GO/PA66 salt by in situ polymerizing and melt spinning. By tuning the GO content, the tensile strength and Young’s modulus of the GO/PA66 fibers are increased from 265 ± 18 to 710 ± 14 MPa (containing 0.3 wt% GO) and from 1.1 ± 0.08 to 3.8 ± 0.19 GPa (containing 0.5 wt% GO), respectively. The remarkable improvements are attributed to the uniform dispersion of GO in the GO/PA66 salt nanocomposite via ionic bonding and hydrogen bonding in the in situ precipitation process, and the covalent interfacial bonding between the GO and PA66 during the in situ polymerization process. This work sheds light on the easy fabrication of high-performance PA66-based nanocomposites.

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