The Effect of Milling Speed on Particle Size and Morphology of Cu25W Composite Powder

Biyik, Serkan; Aydın, Murat

doi:10.12693/aphyspola.127.1255

Cited by 53 publications

(15 citation statements)

References 14 publications

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“…The most important parameters that influence resulting characteristics of the powder is the type of shredder, speed of the working body, the time of shredding, the degree of filling a container [20].…”

Section: Results Of Research Into Quality Of the Shredded Bee Pollen mentioning

confidence: 99%

Optimization of technology for shredding the bee pollen

Merzlov

Lomova

Narizhniy

et al. 2017

EEJET

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Section: Results Of Research Into Quality Of the Shredded Bee Pollen mentioning

confidence: 99%

Optimization of technology for shredding the bee pollen

Merzlov

Lomova

Narizhniy

et al. 2017

EEJET

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“…The most common metal oxides used in electrical contacts are cadmium oxide (CdO), tin dioxide (SnO 2 ) and zinc oxide (ZnO) [3][4][5]. Apart from this, refractory metals such as tungsten (W) and molybdenum (Mo) are widely used in Ag-or Cu-based electrical contacts [6].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Arc-Erosion Behavior of Ag8SnO₂ Electrical Contact Materials under Inductive Loads

Biyik

Aydın

2017

Acta Phys. Pol. A

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In this study, Ag-based SnO2-reinforced electrical contact materials were produced by powder metallurgy and mechanical alloying techniques. Elemental powder mixture containing 8 wt.% SnO2 was milled in a highenergy planetary-type ball mill, to achieve homogeneously mixed composite powder, and subsequently pressed in a closed die to obtain green compacts with a cylindrical shape and then sintered under vacuum to obtain composites. Composites were then subjected to electrical wear tests under inductive loads to investigate the arc-erosion performance of electrical contacts. Surface deterioration and mass losses of electrical contacts were also evaluated, as a function of increasing switching number. Characterization of the starting and composite powders, green compacts, composites and arc-originated surface deterioration was carried out using scanning electron microscopy and energy-dispersive X-ray spectroscopy. It was found that powder particle size had decreased with the increasing milling time. Density and hardness values of the composites had increased, whereas porosity had decreased with the increasing sintering temperature. Optimum sintering temperature was determined as 900The arc-affected zones became bigger with the increase of the number of switching operations. Furthermore, comparison between surface morphologies and mass losses of arc-eroded specimens had revealed that the stationary contacts exhibit higher rates of erosion than the movable contacts.

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“…Composite materials are used in a wide range of applications [6][7][8][9][10][11][12][13]. A lot of work has been done towards producing and evaluating the electrical performance of contact materials [14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Mechanical Alloying Parameters of Cu25W Electrical Contact Material

Biyik

Aydın

2017

Acta Phys. Pol. A

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In this study, the effect of mechanical alloying parameters, namely the effect of process control agent, ballto-powder weight ratio and milling duration, on the synthesis of Cu25W composite powder was investigated. Planetary-type ball milling equipment was used to conduct mechanical alloying experiments. Stearic acid was used as the process control agent in order to establish a balance between cold welding and fracturing. The optimum amount of stearic acid was determined as a function of particle size and milling time at constant speed. By using this optimum amount of process control agent, three different ball-to-powder weight ratio values were also employed, and the effect of ball-to-powder weight ratio on particle size and morphology of Cu25W composite powders was investigated. The microstructural evolution of the milled powders was characterized using scanning electron microscopy and laser diffraction analysis. The test results have shown that the morphology and particle size distribution of the milled powders change significantly depending upon the milling parameters. In addition, higher ball-to-powder weight ratio values tend to lower the milling duration for the same amount of particle size reduction. However, particle size reduction suffers beyond the maximal value of ball-to-powder weight ratio, especially in the later stages of mechanical alloying.

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The Effect of Milling Speed on Particle Size and Morphology of Cu25W Composite Powder

Cited by 53 publications

References 14 publications

Optimization of technology for shredding the bee pollen

Optimization of technology for shredding the bee pollen

Fabrication and Arc-Erosion Behavior of Ag8SnO₂ Electrical Contact Materials under Inductive Loads

Optimization of Mechanical Alloying Parameters of Cu25W Electrical Contact Material

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The Effect of Milling Speed on Particle Size and Morphology of Cu25W Composite Powder

Cited by 53 publications

References 14 publications

Optimization of technology for shredding the bee pollen

Optimization of technology for shredding the bee pollen

Fabrication and Arc-Erosion Behavior of Ag8SnO2 Electrical Contact Materials under Inductive Loads

Optimization of Mechanical Alloying Parameters of Cu25W Electrical Contact Material

Contact Info

Product

Resources

About

Fabrication and Arc-Erosion Behavior of Ag8SnO₂ Electrical Contact Materials under Inductive Loads