Experimental evaluation of ultrasonic-assisted friction stir process effect on in situ dispersion of multi-walled carbon nanotubes throughout polyamide 6

Zinati, Reza Farshbaf

doi:10.1007/s00170-015-7357-y

Cited by 13 publications

(3 citation statements)

References 22 publications

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“…When it comes to connecting thermoplastics, ultrasonic welding has been shown to be a viable option among all of the fusion methods tested. The intermolecular interaction between the thermoplastics induced by ultrasonic vibrations causes intermolecular diffusion and trapping of the molecular chain within the liquid state on the interfaces of the weld polymer in this approach, which is a distinguishing property [9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Welding analysis and optimization of ultra- sonic welding in HDPE-5%PBI composite by CODAS decision-making approach

Рамеш¹,

Panneerselvam²

2022

Phys. Scr.

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Engineering plastics are increasingly being used in structural and non-structural applications. As the need for plastics grows, so do the joining requirements. Ultrasonic welding is one of the favoured processes for polymer composites among numerous approaches, especially for bonding plates, automotive panel boards and couplings due to its joint quality and low cost. The High-density polyethylene (HDPE) matrix was reinforced with 5 wt.% of polybenzimidazole (PBI) fibre by twin screw extrusion process and welding samples were prepared using injection moulding. In this study, Ultrasonic welding was used to connect 4-mm-thick lapped HDPE-5wt. % PBI composites. Taguchi-based L27 orthogonal array was employed for experiments to study the lateral shear strength (LSS) and Shore-D-Hardness for the input parameters (i) weld duration (30,45 and 60 ms), (ii) frequency (19,20 and 21 Hz) and (iii) horn pressure (1.5,2 and 2.5 MPa). The relevance of the parameters affecting shear strength and hardness of weld was studied using analysis of variance (ANOVA). ANOVA results shows the frequency (Hz) and weld time (ms) had contributed 32.4% and 31.6% in determining shear strength and weld time (ms) contributes 45% for shore D hardness. The ultrasonic welding process was carried out, and the multi-criteria decision-making (MCDM) approach was used to optimise the process parameters. From CODAS assessment the relative evaluation score of 2.444 was achieved by the twenty fifth experiment having the input parameters (IP) at 60 ms welding time, frequency of 21 Hz and pressure at 2.5 MPa considering each output factor with an entropy of 0.5. Fractography and weld morphology of welded joints were investigated using scanning electron microscope (SEM).

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Section: Introductionmentioning

confidence: 99%

Welding analysis and optimization of ultra- sonic welding in HDPE-5%PBI composite by CODAS decision-making approach

Рамеш¹,

Panneerselvam²

2022

Phys. Scr.

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“…10 Madhukar et al 11 fabricated an AA7150-1% SiCp nanocomposite using ultrasonication assisted stir casting technique and found enhancement of mechanical properties such as tensile strength by 5.42%, microhardness by 7.73% and the porosity reduced to 64.7%. Farshbaf Zinati 12 fabricated a polyamide 6 composite reinforced with multi-walled carbon nanotubes using UAFSP and studied effect of traverse speed on the fabrication and hardness. It was found that the nano-composite are fabricated at higher traverse speeds with effecting the hardness and homogeneity in the composite.…”

Section: Introductionmentioning

confidence: 99%

Optimization of ultrasonic vibration assisted friction stir process to improve mechanical properties of AA7075-nano B₄C surface composite

Swathi

Raju

Rao

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Ultrasonic Vibration assisted Friction Stir Processing is one of the advanced surface modification techniques developed for ductile materials like aluminium to improve their surface properties. The present study is aimed to improve mechanical properties of the AA7075-T651 surface composite by reinforcing the nano B4C particles with optimum working condition. Experiments are conducted at different levels of tool rotation speed, tool processing speed and volume percentage of nano B4C particles with and without ultrasonic vibrations and the experimental results for ultimate tensile strength, impact strength, yield strength, percentage of elongation and hardness are measured. Jaya Algorithm (JA) is used and found best optimum condition such as 1112 r/min of tool rotational speed, 43.96 mm/min of tool traverse speed and 4.02 vol % of B4C nano particles. Mechanical properties and microstructure are investigated using optical Microscope, Field emission scanning electron microscope and Transmission electron microscopy analysis. A fine grain structure and uniform distribution of reinforcement are found in the matrix with the ultrasonic vibrations and the mechanical properties of the AA7075 alloy are improved. The microstructure of the surface composite is correlated with the mechanical properties.

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“…Both physical and chemical approaches have been explored in an attempt to solve the dispersion problem of CNTs in the matrix. The physical approaches include, such as ultrasonic processing , ball milling , and the noncovalent surface modification . Moreover, the chemical modification is also an effective way to improve the dispersion of CNTs .…”

Section: Introductionmentioning

confidence: 99%

Homogeneous dispersion of multiwalled carbon nanotubes via in situ bubble stretching and synergistic cyclic volume stretching for conductive LDPE/MWCNTs nanocomposites

Yang

Tong

et al. 2019

Polymer Engineering & Sci

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Low-density polyethylene (LDPE)/multiwalled carbon nanotubes (MWCNTs) nanocomposites with different foaming agent (OBSH) contents were innovatively prepared via In Situ Bubble Stretching (ISBS) and synergistic cyclic volume stretching. The cyclic convergent and divergent flow makes the MWCNTs repeatedly subjected to bubble stretching, which is conducive to the efficient dispersion of MWCNTs in the matrix. The thermal weight loss of neat OBSH and nanocomposite were characterized by thermal gravimetric analyzer (TGA), which indicated that the OBSH in the nanocomposite had been completely decomposed into gas during the plasticizing transport process. The results of morphology showed that the moderate content of OBSH had better dispersion effect on MWCNTs. At optimal OBSH content, the OBSH could generate enough gas and larger bubbles per unit time to provide greater expansion forces to do much for the dispersion of MWCNTs. The dynamic mechanical analysis (DMA) was further carried out and also proved that the content of OSBH was an important factor for the dispersion of MWCNTs. Moreover, the relationship between the OBSH content and conductivity was discussed in details. The improvement in conductive properties of nanocomposites associated with the use of the method can be attributed to a more homogeneous dispersion of MWCNTs. POLYM. ENG.

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Experimental evaluation of ultrasonic-assisted friction stir process effect on in situ dispersion of multi-walled carbon nanotubes throughout polyamide 6

Cited by 13 publications

References 22 publications

Welding analysis and optimization of ultra- sonic welding in HDPE-5%PBI composite by CODAS decision-making approach

Welding analysis and optimization of ultra- sonic welding in HDPE-5%PBI composite by CODAS decision-making approach

Optimization of ultrasonic vibration assisted friction stir process to improve mechanical properties of AA7075-nano B₄C surface composite

Homogeneous dispersion of multiwalled carbon nanotubes via in situ bubble stretching and synergistic cyclic volume stretching for conductive LDPE/MWCNTs nanocomposites

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Experimental evaluation of ultrasonic-assisted friction stir process effect on in situ dispersion of multi-walled carbon nanotubes throughout polyamide 6

Cited by 13 publications

References 22 publications

Welding analysis and optimization of ultra- sonic welding in HDPE-5%PBI composite by CODAS decision-making approach

Welding analysis and optimization of ultra- sonic welding in HDPE-5%PBI composite by CODAS decision-making approach

Optimization of ultrasonic vibration assisted friction stir process to improve mechanical properties of AA7075-nano B4C surface composite

Homogeneous dispersion of multiwalled carbon nanotubes via in situ bubble stretching and synergistic cyclic volume stretching for conductive LDPE/MWCNTs nanocomposites

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Optimization of ultrasonic vibration assisted friction stir process to improve mechanical properties of AA7075-nano B₄C surface composite