Effect Of Different Mechanical Milling Processes On Morphology And Microstructural Changes Of Nano And Micron Al-Powders

Kim, H.-S.; Madavali, Babu; Eom, T.-J.; Kim, C.-M.; Koo, Jar-Myung; Lee, T.-H.; Hong, Soon‐Jik

doi:10.1515/amm-2015-0105

Cited by 15 publications

(2 citation statements)

References 21 publications

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“…It is observed that the powders are appeared to be very fine with irregular shape. Some fine powder is agglomerated with each other due to the cold welding taking place during milling are clearly visible in the micrographs [11]. In addition, the particle size analysis (PSA) is carrier out for p-type Bi 0.5 Sb 1.5 Te 3 powders, and shown in Fig.…”

Section: Methodsmentioning

confidence: 98%

Investigation of the Microstructure and Thermoelectric Properties of P-Type BiSbTe Alloys by Usage of Different Revolutions Per Minute (RPM) During Mechanical Milling

Yoon¹,

Madavali²,

Yoon³

et al. 2017

Archives of Metallurgy and Materials

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In this work, p-type Bi 0.5 Sb 1.5 Te 3 alloys were fabricated by high-energy ball milling (MA) and spark plasma sintering. Different revolutions per minute (RPM)s were used in the MA process, and their effect on microstructure, and thermoelectric properties of p-type Bi 0.5 Sb 1.5 Te 3 were systematically investigated. The crystal structure of milled powders and sintered samples were characterized using X-ray diffraction. All the powders exhibited the same morphology albeit with slight differences find at 1100 RPM conditions. A slight grain size refinement was observed on the fracture surfaces from 500 to 1100 RPM specimens. The temperature dependence of Seebeck coefficient, electrical conductivity, and power factors were measured as a function of temperature with different RPM conditions. The power factor shows almost same (~3.5 W/mK 2 at RT) for all samples due to unchanged Seebeck and electrical conductivity values. The peak ZT of 1.07 at 375K is obtained for 1100 RPM specimen due to low thermal conductivity.

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Section: Methodsmentioning

confidence: 98%

Investigation of the Microstructure and Thermoelectric Properties of P-Type BiSbTe Alloys by Usage of Different Revolutions Per Minute (RPM) During Mechanical Milling

Yoon¹,

Madavali²,

Yoon³

et al. 2017

Archives of Metallurgy and Materials

Self Cite

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show abstract

“…The process lasted 12 h. Fig. 2 illustrates the ball-milling equipment for MNP synthesis and the difference in the low-and high-energy agglomeration surface morphological effects of the different ball milling processes [67]. The sizes and average crystallite concentrations of magnetite-based dispersions were also analyzed for different milling times for wet milling with argon gas [68].…”

Section: Ball-milling Methodsmentioning

confidence: 99%

Synthesis Methods of Fe₃O₄ Nanoparticles for Biomedical Applications

et al. 2023

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Magnetic nanoparticles made from organic and inorganic materials have gained significant technological progress and are widely applied in biomedicine, including magnetic resonance imaging, targeted drug delivery systems, biosensors, hyperthermia, and tissue engineering. The most reported synthesis methods include hydrothermal, sol‐gel, laser ablation, microemulsion, and ball‐milling methods. The synthesis parameters have a strong correlation with essential properties, such as phase, size, and surface morphology, which greatly influence the macroscopic properties and potential applications of the particles. Different preparation methods result in magnetic nanoparticles with varying characteristics, and the appropriate method can be chosen based on the requirements of the specific application. Two effective methods for synthesizing magnetic nanoparticles are coprecipitation and hydrothermal method because the preparation is relatively simple with low energy consumption, and uniform and homogeneous crystals are obtained.

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Scalable Aqueous Processing‐Based Passive Daytime Radiative Cooling Coatings

Huang

Chen

Luo

et al. 2021

Adv Funct Materials

110

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Passive daytime radiative cooling (PDRC) can realize electricity‐free cooling by reflecting sunlight and emitting heat to the cold space. Current PDRC designs often involve costly vacuum processing or a large quantity of harmful organic solvents. Aqueous and paint‐like processing is cost‐effective and environmentally benign, thereby highly attractive for green manufacturing of PDRC coatings. However, common polymers explored in PDRC are difficult to disperse in water, let alone forming porous structures for efficient cooling. Here, a simple “bottom‐up” ball milling approach to create uniform microassembly of poly(vinylidene fluoride‐co‐hexafluoropropene) nanoparticles is reported. The micro‐ and nanopores among secondary particles and primary particles substantially enhance light scattering and results in excellent PDRC performance. A high solar reflectance of 0.94 and high emittance of 0.97 are achieved, making the coating 3.3 and 1.7 °C cooler than commercial white paints and the ambient temperature, under a high solar flux of ≈1100 W m−2. More importantly, the volatile organic compound content in the aqueous paint is only 71 g L−1. This satisfies the general regulatory requirements, which are critical to sustainability and practical applications.

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Effect Of Different Mechanical Milling Processes On Morphology And Microstructural Changes Of Nano And Micron Al-Powders

Cited by 15 publications

References 21 publications

Investigation of the Microstructure and Thermoelectric Properties of P-Type BiSbTe Alloys by Usage of Different Revolutions Per Minute (RPM) During Mechanical Milling

Investigation of the Microstructure and Thermoelectric Properties of P-Type BiSbTe Alloys by Usage of Different Revolutions Per Minute (RPM) During Mechanical Milling

Synthesis Methods of Fe₃O₄ Nanoparticles for Biomedical Applications

Scalable Aqueous Processing‐Based Passive Daytime Radiative Cooling Coatings

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Effect Of Different Mechanical Milling Processes On Morphology And Microstructural Changes Of Nano And Micron Al-Powders

Cited by 15 publications

References 21 publications

Investigation of the Microstructure and Thermoelectric Properties of P-Type BiSbTe Alloys by Usage of Different Revolutions Per Minute (RPM) During Mechanical Milling

Investigation of the Microstructure and Thermoelectric Properties of P-Type BiSbTe Alloys by Usage of Different Revolutions Per Minute (RPM) During Mechanical Milling

Synthesis Methods of Fe3O4 Nanoparticles for Biomedical Applications

Scalable Aqueous Processing‐Based Passive Daytime Radiative Cooling Coatings

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Synthesis Methods of Fe₃O₄ Nanoparticles for Biomedical Applications