Powder Size and Distribution in Ultrasonic Gas Atomization

JOM ◽  
1985 ◽  
Vol 37 (8) ◽  
pp. 22-26 ◽  
Author(s):  
G. Rai ◽  
E. Lavernia ◽  
N. J. Grant
Keyword(s):  
Powder Size ◽  
Gas Atomization ◽  
Ultrasonic Gas Atomization

Pressure build-up at the metal delivery tube orifice in ultrasonic gas atomization

1988 ◽  
Vol 23 (7) ◽  
pp. 2457-2463 ◽  
Author(s):  
J. C. Baram ◽  
M. K. Veistinen ◽  
E. J. Lavernia ◽  
M. Abinante ◽  
N. J. Grant
Keyword(s):  
Gas Atomization ◽  
Delivery Tube ◽  
Ultrasonic Gas Atomization ◽  
Metal Delivery

scholarly journals Production and Characterization of Commercial Aluminum Powders by a New Nozzle Design and Atomization Unit

2021 ◽  
Vol 9 (12) ◽  
pp. 1259-1263
Author(s):  
Hakan Gokmese
Keyword(s):  
Particle Size ◽  
Average Particle Size ◽  
Experimental Studies ◽  
Average Particle ◽  
Powder Size ◽  
Gas Atomization ◽  
Pure Aluminium ◽  
Metal Powders ◽  
Important Place ◽  
Measuring Device

Abstract: A large area cross section of the production of spherical metal powders by gas atomization in the manufacturing method. Powder metal characteristic improves with small powder size. This aim was realized by vertical gas atomization unit, a new a closely-matched nozzle system and manufacture. In the experimental studies, pure aluminium powders which has an important place in the automotive, air and defence industries were produced. In the studies carried out with the Vertical Gas Atomization unit, aluminium was superheated up to 900°C and atomized at different gas pressures (20-30 bar). Scanning electron microscope (SEM) and particle size measuring device were used for the characterization and size measurements of the produced powders, respectively. The average particle size of the finest powder produced with increasing atomization pressure was determined as d50=19.50µm. Aluminium powder shape and morphology was used as spherical and very little satellization was seen. Keywords: Powder Metallurgy, Atomisation, Nozzle, Al powder, Characterisation

The Magnetic Properties of Fe-6.5wt.%Si Alloy Powders Produced by High Pressure Gas Atomization

2013 ◽  
Vol 800 ◽  
pp. 302-307
Author(s):  
Ke Xie ◽  
Chang Jiang Song ◽  
Ke Feng Li ◽  
Liang Zhu ◽  
Qi Jie Zhai
Keyword(s):  
Heat Treatment ◽  
High Pressure ◽  
Magnetic Properties ◽  
Atmospheric Environment ◽  
Powder Size ◽  
Soft Magnetic Properties ◽  
Gas Atomization ◽  
Vibrating Sample Magnetometer ◽  
Soft Magnetic ◽  
Optimal Capacity

The soft magnetic properties of Fe-6.5wt.%Si alloy powders produced via high pressure gas atomization under different powder sizes, environments (atmospheric and vacuum) and heat-treatment were presented by vibrating sample magnetometer (VSM), respectively. It is found that the soft magnetic properties of powder gradually grow up as the increasing of the powder size under atmospheric and vacuum environments. However, the using of vacuum environment has an optimal capacity to strengthening the properties rather than atmospheric environment. The heat-treatment of 1000°C for 2 hours offers considerable potential for improving the soft magnetic properties of the powders.

Amorphous and microcrystalline Cu0.6Zr0.4 powders made by ultrasonic gas atomization

1983 ◽  
Vol 57 (1) ◽  
pp. L1-L2 ◽  
Author(s):  
P. Domalavage ◽  
C. Ashdown ◽  
R.C. O'Handley ◽  
N.J. Grant
Keyword(s):  
Gas Atomization ◽  
Ultrasonic Gas Atomization

scholarly journals Modification of Liquid Steel Viscosity and Surface Tension for Inert Gas Atomization of Metal Powder

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 521
Author(s):  
Iurii Korobeinikov ◽  
Anton Perminov ◽  
Tobias Dubberstein ◽  
Olena Volkova
Keyword(s):  
Surface Tension ◽  
Liquid Metal ◽  
Metal Powder ◽  
Flow Rate ◽  
Gas Flow ◽  
Metal Flow ◽  
Inert Gas ◽  
Powder Size ◽  
Gas Atomization ◽  
Technological Parameters

Inert gas atomization is one of the main sources for production of metal powder for powder metallurgy and additive manufacturing. The obtained final powder size distribution is controlled by various technological parameters: gas flow rate and pressure, liquid metal flow rate, gas type, temperature of spraying, configuration of nozzles, etc. This work explores another dimension of the atomization process control: modifications of the liquid metal properties and their effect on the obtained powder size. Series of double-alloyed Cr-Mn-Ni steels with sulfur and phosphorus were atomized with argon at 1600 °C. The results indicate that surface tension and viscosity modifications lead to yielding finer powder fractions. The obtained correlation is compared with the individual modification of surface tension with S and Se and modification of viscosity with phosphorus. Discrepancy of the results is discussed. Additives of surfactants and viscosity modifiers can be a useful measure for powder fractions control.

Fluid Flow Behaviour and Solidification Studies During Ultrasonic Gas Atomization

1988 ◽  
pp. 43-46
Author(s):  
J. LIU ◽  
L. ARNBERG ◽  
N. BÄCKSTRÖM ◽  
H. KLANG ◽  
S. SAVAGE
Keyword(s):  
Fluid Flow ◽  
Flow Behaviour ◽  
Gas Atomization ◽  
Ultrasonic Gas Atomization
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