Apparatus for making environmentally stable reactive alloy powders
Abstract
Apparatus and method for making powder from a metallic melt by atomizing the melt to form droplets and reacting the droplets downstream of the atomizing location with a reactive gas. The droplets are reacted with the gas at a temperature where a solidified exterior surface is formed thereon and where a protective refractory barrier layer (reaction layer) is formed whose penetration into the droplets is limited by the presence of the solidified surface so as to avoid selective reduction of key reactive alloyants needed to achieve desired powder end use properties. The barrier layer protects the reactive powder particles from environmental constituents such as air and water in the liquid or vapor form during subsequent fabrication of the powder to end-use shapes and during use in the intended service environment.
- Inventors:
-
- Ames, IA
- Issue Date:
- Research Org.:
- Ames Laboratory (AMES), Ames, IA; Iowa State Univ., Ames, IA (United States)
- OSTI Identifier:
- 870758
- Patent Number(s):
- 5589199
- Application Number:
- 08/328,115
- Assignee:
- Iowa State University Research Foundation, Inc. (Ames, IA)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER
C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS
- DOE Contract Number:
- W-7405-ENG-82
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- apparatus; environmentally; stable; reactive; alloy; powders; method; powder; metallic; melt; atomizing; form; droplets; reacting; downstream; location; gas; reacted; temperature; solidified; exterior; surface; formed; thereon; protective; refractory; barrier; layer; reaction; penetration; limited; presence; avoid; selective; reduction; key; alloyants; achieve; desired; properties; protects; particles; environmental; constituents; air; water; liquid; vapor; subsequent; fabrication; end-use; shapes; intended; service; environment; atomizing location; achieve desired; alloy powders; selective reduction; reaction layer; metallic melt; reactive gas; alloy powder; barrier layer; powder particles; exterior surface; formed thereon; protective refractory; subsequent fabrication; vapor form; stable reactive; reactive alloy; form droplets; environmentally stable; active powder; droplets downstream; /425/75/266/427/
Citation Formats
Anderson, Iver E, Lograsso, Barbara K, and Terpstra, Robert L. Apparatus for making environmentally stable reactive alloy powders. United States: N. p., 1996.
Web.
Anderson, Iver E, Lograsso, Barbara K, & Terpstra, Robert L. Apparatus for making environmentally stable reactive alloy powders. United States.
Anderson, Iver E, Lograsso, Barbara K, and Terpstra, Robert L. Mon .
"Apparatus for making environmentally stable reactive alloy powders". United States. https://www.osti.gov/servlets/purl/870758.
@article{osti_870758,
title = {Apparatus for making environmentally stable reactive alloy powders},
author = {Anderson, Iver E and Lograsso, Barbara K and Terpstra, Robert L},
abstractNote = {Apparatus and method for making powder from a metallic melt by atomizing the melt to form droplets and reacting the droplets downstream of the atomizing location with a reactive gas. The droplets are reacted with the gas at a temperature where a solidified exterior surface is formed thereon and where a protective refractory barrier layer (reaction layer) is formed whose penetration into the droplets is limited by the presence of the solidified surface so as to avoid selective reduction of key reactive alloyants needed to achieve desired powder end use properties. The barrier layer protects the reactive powder particles from environmental constituents such as air and water in the liquid or vapor form during subsequent fabrication of the powder to end-use shapes and during use in the intended service environment.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 1996},
month = {Mon Jan 01 00:00:00 EST 1996}
}
Works referenced in this record:
Iron‐based rare‐earth magnets (invited)
journal, April 1985
- Narasimhan, K. S. V. L.
- Journal of Applied Physics, Vol. 57, Issue 8