Investigating the morphology, hardness, and porosity of copper filters produced via Hydraulic Pressing

Ayub, Hasan; Khan, Liaqat Ali; McCarthy, Éanna; Ahad, Inam Ul; Fleischer, Karsten; Brabazon, Dermot

doi:10.1016/j.jmrt.2022.05.012

Cited by 9 publications

(3 citation statements)

References 32 publications

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“…The correlation between hardness and porosity is inverse regarding the previous study [14]. This because of the optimum intermolecular space [15] which was distinctively shown in figure 5.…”

Section: Determination Of the Percentage Of Fibermentioning

confidence: 70%

The effect of natural fiber ratio on mechanical properties of kaolin/fly–ash at low temperature ceramics

Panthuwat

Thipboonraj

Wannawek

et al. 2023

J. Phys.: Conf. Ser.

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This study aims to increase the feasibility of ceramics at low temperature using natural fibers. The ceramics (Ce) were prepared by mixing a powder of kaolin and fly–ash at an equal ratio of 50:50 wt.%. The mixture was milled by ball–milling technique. The natural fibers ceramics (CeNF) were created by adding local pineapple leaves to kaolin and fly–ash powder. Scanning electron microscopy (SEM) was used to amorphous observation and particle size determination. The compositions of Ce and CeNF were investigated by using X–ray diffraction (XRD) technique. The mechanical properties of ceramics were determined by hardness and density test. The results showed that the grinding of kaolin and fly–ash for 4 h produced the highest strength Ce. For the addition of local pineapple leaves at 2 wt.%, the strength could be increased from 92.9 kgf to 118.3 kgf.

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Section: Determination Of the Percentage Of Fibermentioning

confidence: 70%

The effect of natural fiber ratio on mechanical properties of kaolin/fly–ash at low temperature ceramics

Panthuwat

Thipboonraj

Wannawek

et al. 2023

J. Phys.: Conf. Ser.

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“…In this study, an Autotouch 40-ton hydraulic press was used to compact the Cu-CNTs powder to form 2 mm thick and 20 mm diameter pellets. A pressure of 793 MPa was applied to the powder for 9 min following previous studies (see [32]). The optical reflection of the pure copper and Cu-CNTs was analyzed using a Perkin Elmer Spectrum Two FTIR.…”

Section: Laser Processingmentioning

confidence: 99%

Investigation on Optical Absorption and Reflection of Carbon Nanotubes Mixed Copper Composites for Laser Sintering Process Improvement

Ayub,

Khan,

McCarthy

et al. 2023

Metals

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Selective laser sintering (SLS) of copper components manufactured via powder metallurgy is widely studied due to minimal material wastage. However, copper has poor optical absorption when exposed to infrared (IR) lasers, such as in laser-based additive manufacturing or laser surface processing. To address this issue, an innovative approach to enhance the optical absorption of copper powders during infrared laser sintering is presented in this study. Carbon nanotubes (CNTs) have several unique properties, including their high surface area, plasmonic response, excellent conductivity, and optical absorption properties. CNTs were mixed with copper powders at different weight percentages using an acoustic method. The resulting Cu-CNT compositions were fabricated into pellets. The Box-Behnken Design of Experiments methodology was used to optimize the IR laser processing conditions for sintering. Spectroscopic analysis was conducted to evaluate the reflection and thermal absorption of the IR wavelengths by the Cu-CNT composites. Density and hardness measurements were taken for the laser-sintered Cu-CNT pellets. The coating of copper powders with CNTs demonstrated enhanced optical absorption and correspondingly reduced reflection. Due to the enhanced optical absorption, increased control and sensitivity of the laser sintering process was achieved, which enabled improvement in the mechanical properties of strength, hardness, and density, while also enabling control over the composite thermal expansion coefficient. A maximum average hardness of 66.5 HV was observed. Indentation test results of the samples revealed maximum tangential and radial stresses of 0.148 MPa and 0.058 Mpa, respectively.

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“…The cold isostatic hydraulic pressing method was used to fabricate the copper pellets. The copper powder was used with a spherical shape [15]. The evaluation of the samples was performed via spectroscopy to determine the reflection and absorption of the light by the Cu-CNTs composition.…”

Section: Introductionmentioning

confidence: 99%

Optical absorption and conduction of copper carbon nanotube composite for additive manufacturing

Ayub

2023

Materials Research Proceedings

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Abstract. The applications of nanotechnology are growing widely as nanoscale structures provide unique properties such as high surface area unique plasmonic response and excellent conductivity that can be utilized for a wide range of applications. Optical absorption expansion of copper using carbon nanotube composite is one of the applications of nanotechnology for additive manufacturing of metals, particularly copper. Cu-CNTs mixtures at different percentage concentrations will be prepared via Resodyn, an acoustic mixer machine. Pure copper powder will be used with a spherical powder shape. The evaluation of the samples will be performed via spectroscopy to determine the reflection and thermal absorption of the light by the Cu-CNTs composition. The enhancement in the thermal absorption of Cu powder via additions of CNTs leads to the improvement in the bonding of particles by absorbing laser power. Due to the lower thermal expansion coefficient, sintering is possible at lower laser powers < 40%.

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Investigating the morphology, hardness, and porosity of copper filters produced via Hydraulic Pressing

Cited by 9 publications

References 32 publications

The effect of natural fiber ratio on mechanical properties of kaolin/fly–ash at low temperature ceramics

The effect of natural fiber ratio on mechanical properties of kaolin/fly–ash at low temperature ceramics

Investigation on Optical Absorption and Reflection of Carbon Nanotubes Mixed Copper Composites for Laser Sintering Process Improvement

Optical absorption and conduction of copper carbon nanotube composite for additive manufacturing

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