Paper Title:
Effects of Substrate Geometry on Performance of Twin-Fluid Atomizer in Metal Powder Production
  Abstract

Uniform and spherical metal powders have been widely used in many industrial applications. This paper investigates the control of particle size and size distribution by the impingement of the molten spray on the substrate with different geometries. The idea is to combine the atomization process with the classification process. Result shows that a significant reduction of the particle size occurred when the substrate was placed in the spray jet. The mean particle size was lowered to 8.0μm with a low transmission ratio of the spray jet in the existence of the ring type substrate. The particle size increased from 8.78μm to 12.67μm as the transmission ratio was increased from 13.92% to 75.80%. The reduction in particle size was due to the effect of the blockage of the substrate on the spray. The particle size increased from 6.72μm to 6.98μm when the disk-type substrate was placed at Z = 150mm and 200mm, respectively. The particle size of this case was smaller than the case with ring type substrate because the transmission ratio of the disk type substrate was lower. The percentage of small particles (i.e., V15-) were higher than 60% and the percentages of V25-45 were 4.19% and 0.37% when the disk-type substrate was placed at Z=150mm and Z=200mm, respectively, indicating that almost all of the particles were below 25μm under these conditions. Hence this technique is very effective in controlling the particle size in the metal powder production.

  Info
Periodical
Edited by
Sheng-Jye Hwang and Sen-Yung Lee
Pages
138-149
DOI
10.4028/www.scientific.net/MSF.594.138
Citation
M. R. Wang, C. J. Yang, J. D. Huang, T. C. Lin, M. S. Sheu, "Effects of Substrate Geometry on Performance of Twin-Fluid Atomizer in Metal Powder Production", Materials Science Forum, Vol. 594, pp. 138-149, 2008
Online since
August 2008
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Muh Ron Wang, Pin Jen Chen, Je Rei Yang, Jin Shen Chiu, Tien Chu Lin, Teng Sun Lai
Abstract:This paper describes the performance of an atomizer coupled with a substrate which produces metal powder and spray forming materials...
1237
Authors: Kazumi Minagawa, Hideki Kakisawa, Kohmei Halada
Abstract:Hybrid atomization is a new atomization technique that combines gas atomization with centrifugal atomization. This process can produce fine,...
69
Authors: Shun Li Zhao, Jun Fei Fan, San Bing Ren, Hai Rong Le
Abstract:It is commonly considered that the character of atomizing gas-flowing field would affect breaking method of molten metal, liquid droplet...
1819
Authors: Phairote Sungkhaphaitoon, Thawatchai Plookphol, Sirikul Wisutmethangoon
Chapter 3: Powder Metallurgy and Ceramic Forming
Abstract:In the present work, a centrifugal atomization was studied for producing zinc metal powder. The effect of rotating disc speed on median...
281
Authors: Fang Xu, Wei Dong, Liang Qiang
Chapter 7: Computational Mechanics
Abstract:A new multi-orifice effervescent atomizer used for fire fighting was developed. The droplet size distribution of the spray produced by the...
3056