Production of fine calcium powders by centrifugal atomization with rotating quench bath
Abstract
Recently, a novel Al/Ca composite was produced by severe plastic deformation of Al powders and Ca granules for possible use as a high-voltage power transmission conductor. Since the strength of such composites is inversely proportional to the Ca filament size, fine Ca powders (less than ~250 μm) are needed to achieve the desired high strength for the powder metallurgy production of an Al-matrix composite reinforced by nano-scale Ca filaments. However, fine Ca powders are not commercially available. Therefore, we have developed a method to produce fine Ca powders via centrifugal atomization to supply Ca powder for prototype development of Al/Ca composite conductor. A secondary goal of the project was to demonstrate that Ca powder can be safely prepared, stored, and handled and could potentially be scaled for commercial production. Our results showed that centrifugal atomization can yield as much as 83 vol. % Ca powder particles smaller than 250 μm. The mean particle size sometimes matches, sometimes deviates substantially from the predictions of the Champagne & Anger equation likely due to unexpected secondary atomization. The particle size distribution is typical for a ligament-disintegration atomization mode. Scanning electron micrographs showed that the morphology of these Ca powders varied with powder size.more »
- Authors:
-
- Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Materials Science and Engineering
- (United States)
- Publication Date:
- Research Org.:
- Ames Lab., Ames, IA (United States)
- Sponsoring Org.:
- USDOE Office of Electricity (OE)
- OSTI Identifier:
- 1342925
- Alternate Identifier(s):
- OSTI ID: 1416753
- Report Number(s):
- IS-J-9156
Journal ID: ISSN 0032-5910; PII: S0032591016308816
- Grant/Contract Number:
- AC02-07CH11358
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Powder Technology
- Additional Journal Information:
- Journal Volume: 308; Journal Issue: C; Journal ID: ISSN 0032-5910
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Calcium; Centrifugal atomization; Powder; Stability; particle size; particle morphology
Citation Formats
Tian, Liang, Ames Lab. and Iowa State Univ., Ames, IA, Anderson, Iver, Ames Lab. and Iowa State Univ., Ames, IA, Riedemann, Trevor, Ames Lab. and Iowa State Univ., Ames, IA, Russell, Alan, and Ames Lab. and Iowa State Univ., Ames, IA. Production of fine calcium powders by centrifugal atomization with rotating quench bath. United States: N. p., 2016.
Web. doi:10.1016/j.powtec.2016.12.011.
Tian, Liang, Ames Lab. and Iowa State Univ., Ames, IA, Anderson, Iver, Ames Lab. and Iowa State Univ., Ames, IA, Riedemann, Trevor, Ames Lab. and Iowa State Univ., Ames, IA, Russell, Alan, & Ames Lab. and Iowa State Univ., Ames, IA. Production of fine calcium powders by centrifugal atomization with rotating quench bath. United States. https://doi.org/10.1016/j.powtec.2016.12.011
Tian, Liang, Ames Lab. and Iowa State Univ., Ames, IA, Anderson, Iver, Ames Lab. and Iowa State Univ., Ames, IA, Riedemann, Trevor, Ames Lab. and Iowa State Univ., Ames, IA, Russell, Alan, and Ames Lab. and Iowa State Univ., Ames, IA. Mon .
"Production of fine calcium powders by centrifugal atomization with rotating quench bath". United States. https://doi.org/10.1016/j.powtec.2016.12.011. https://www.osti.gov/servlets/purl/1342925.
@article{osti_1342925,
title = {Production of fine calcium powders by centrifugal atomization with rotating quench bath},
author = {Tian, Liang and Ames Lab. and Iowa State Univ., Ames, IA and Anderson, Iver and Ames Lab. and Iowa State Univ., Ames, IA and Riedemann, Trevor and Ames Lab. and Iowa State Univ., Ames, IA and Russell, Alan and Ames Lab. and Iowa State Univ., Ames, IA},
abstractNote = {Recently, a novel Al/Ca composite was produced by severe plastic deformation of Al powders and Ca granules for possible use as a high-voltage power transmission conductor. Since the strength of such composites is inversely proportional to the Ca filament size, fine Ca powders (less than ~250 μm) are needed to achieve the desired high strength for the powder metallurgy production of an Al-matrix composite reinforced by nano-scale Ca filaments. However, fine Ca powders are not commercially available. Therefore, we have developed a method to produce fine Ca powders via centrifugal atomization to supply Ca powder for prototype development of Al/Ca composite conductor. A secondary goal of the project was to demonstrate that Ca powder can be safely prepared, stored, and handled and could potentially be scaled for commercial production. Our results showed that centrifugal atomization can yield as much as 83 vol. % Ca powder particles smaller than 250 μm. The mean particle size sometimes matches, sometimes deviates substantially from the predictions of the Champagne & Anger equation likely due to unexpected secondary atomization. The particle size distribution is typical for a ligament-disintegration atomization mode. Scanning electron micrographs showed that the morphology of these Ca powders varied with powder size. Spark testing and auto-ignition tests indicated that the atomized powders were difficult to ignite, providing confidence that this material can be handled safely in air.},
doi = {10.1016/j.powtec.2016.12.011},
journal = {Powder Technology},
number = C,
volume = 308,
place = {United States},
year = {Mon Feb 08 00:00:00 EST 2016},
month = {Mon Feb 08 00:00:00 EST 2016}
}
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