scholarly journals Design and Development of a Centrifugal Atomizer for Producing Zinc Metal Powder

2012 ◽  
pp. 77-82
Author(s):  
Phairote Phairote ◽  
Thawatchai Plookphol ◽  
Sirikul Wisutmethangoon
Keyword(s):  
Metal Powder ◽  
Design And Development ◽  
Zinc Metal ◽  
Centrifugal Atomizer

Centrifugal Atomization of Zinc Metal Powder for Friction Materials Application

2012 ◽  
Vol 488-489 ◽  
pp. 281-285
Author(s):  
Phairote Sungkhaphaitoon ◽  
Thawatchai Plookphol ◽  
Sirikul Wisutmethangoon
Keyword(s):  
Particle Size ◽  
Standard Deviation ◽  
Metal Powder ◽  
Production Yield ◽  
Median Particle Size ◽  
Rotating Disc ◽  
Sem Images ◽  
Centrifugal Atomization ◽  
Zinc Metal ◽  
Median Particle

In the present work, a centrifugal atomization was studied for producing zinc metal powder. The effect of rotating disc speed on median particle size, particle size distribution and standard deviation, production yield, and morphology of the atomized zinc powder was investigated. The atomization was carried out using graphite flat disc, melt pouring temperature, preheating disc temperature and melt feed rate of 40 mm, 550 °C, 300 °C and 50 kg/h, respectively. The atomizer disc speeds were varied from 10,000 to 30,000 rpm. It was evidenced from the experimental results that the median particle size and standard deviation of zinc metal powder decreased with increasing disc speed. The production yield tended to increase with increasing rotating speed. SEM images revealed that most zinc metal particles were irregular, elongated flakes. This kind of zinc power may be suitable for use as a friction material for manufacturing brake pad component in the automotive part industry

Effect of Atomizer Disc Geometry on Zinc Metal Powder Production by Centrifugal Atomization

2012 ◽  
Vol 271-272 ◽  
pp. 232-236 ◽  
Author(s):  
Phairote Sungkhaphaitoon ◽  
Wittaya Likhidkan ◽  
Sermwit Kitjaidiaw ◽  
Sirikul Wisutmethangoon ◽  
Thawatchai Plookphol
Keyword(s):  
Metal Powder ◽  
Ambient Air ◽  
Sem Images ◽  
Centrifugal Atomization ◽  
Melt Flow Rate ◽  
Melt Temperature ◽  
Zinc Metal ◽  
Powder Production ◽  
Air Atmosphere ◽  
Median Particle

The purpose of this paper is to demonstrate the influence of atomizer disc shape and size on the characteristics of zinc metal powder produced by centrifugal atomization. Two types of atomizer disc were employed, the flat disc and the cup-shaped disc with diameters of 30 and 50 mm for each type. The atomization was carried out in ambient air atmosphere, at pouring melt temperature of 550°C. The molten zinc was fed by gravity through a 1.0 mm nozzle with melt flow rate of approximately 50 kg/hr onto the atomizer disc spinning with a speed of 30,000 rpm. It was found that, the median particle size of zinc metal powder was decreased with increasing atomizer disc size. The cup-shaped disc gave better powder production with smaller particle median size and higher production yield. SEM images revealed that most zinc metal particles were irregular, ligament and elongated flakes. The oxygen in air might inhibit the spheroidization of melt droplet during solidification.

A case study on use of personas in design and development of an audit management system

2007 ◽  
Author(s):  
Pallavi Dharwada ◽  
Joel S. Greenstein ◽  
Anand K. Gramopadhye ◽  
Steve J. Davis
Keyword(s):  
Management System ◽  
Design And Development ◽  
Audit Management
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