Title:
METALLURGICAL POWDER COMPOSITIONS AND ARTICLES AND METHODS UTILIZING THE SAME
Document Type and Number:
WIPO Patent Application WO2005053881
Kind Code:
A3
Abstract:
The metallurgical powder composition suspensions of the present invention include a magnetic powder having an outer oxide layer suspended in a carrier fluid. Magnetic powders include iron-based powders, such as for example, powders of iron pre-alloyed with other elements. Alloying materials include columbium, silicon, calcium, manganese, magnesium, carbon, boron, aluminum, titanium, molybdenum, chromium, copper, nickel, gold, vanadium, phosphorus, or combinations thereof Carrier fluids include silicon-based fluids and/or oils, such as hydrocarbon oils. The outer oxide layer includes alloy materials that are reacted/complexed with oxygen. Magnetic powders exhibit low rates of oxidation over a broad temperature range. Articles incorporating metallurgical powder composition suspensions include dampeners having a chamber, a piston that reciprocates in the chamber, and a source of magnetism operatively connected to the chamber. The source of magnetism, when activated, produces a magnetic field that changes the apparent viscosity of the metallurgical powder composition suspension.
Inventors:
SCHADE CHRISTOPHER T
HAMILL JACK A JR (US)
HAMILL JACK A JR (US)
Application Number:
PCT/US2004/035569
Publication Date:
March 30, 2006
Filing Date:
October 27, 2004
Export Citation:
Assignee:
HOEGANAES CORP (US)
SCHADE CHRISTOPHER T
HAMILL JACK A JR (US)
SCHADE CHRISTOPHER T
HAMILL JACK A JR (US)
International Classes:
B22F1/145; C22C33/02; F16F9/53; H01F1/28; H01F1/33; H01F1/44; (IPC1-7): F16D37/02
Foreign References:
| US5578238A | 1996-11-26 | |||
| US4289549A | 1981-09-15 | |||
| US6440322B1 | 2002-08-27 |
Other References:
See also references of EP 1706234A4
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