Method of forming magnetostrictive rods from rare earth-iron alloys

Title: Method of forming magnetostrictive rods from rare earth-iron alloys

Full Record
Other Related Research

Abstract

Rods of magnetrostructive alloys of iron with rare earth elements are formed by flowing a body of rare earth-iron alloy in a crucible enclosed in a chamber maintained under an inert gas atmosphere, forcing such molten rare-earth-iron alloy into a hollow mold tube of refractory material positioned with its lower end portion within the molten body by means of a pressure differential between the chamber and mold tube and maintaining a portion of the molten alloy in the crucible extending to a level above the lower end of the mold tube so that solid particles of higher melting impurities present in the alloy collect at the surface of the molten body and remain within the crucible as the rod is formed in the mold tube.

Inventors:

McMasters, O. Dale ^[1]

(Ames, IA)

Issue Date:: 1986-09-02

Research Org.:: Ames Laboratory (AMES), Ames, IA; Iowa State University, Ames, IA (US)

OSTI Identifier:: 865970

Patent Number(s):: 4609402

Application Number:: 06/792,341

Assignee:: Iowa State University Research Foundation, Inc. (Ames, IA) AMES

DOE Contract Number:: W-7405-ENG-82

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: method; forming; magnetostrictive; rods; rare; earth-iron; alloys; magnetrostructive; iron; earth; elements; formed; flowing; alloy; crucible; enclosed; chamber; maintained; inert; gas; atmosphere; forcing; molten; rare-earth-iron; hollow; mold; tube; refractory; material; positioned; portion; means; pressure; differential; maintaining; extending; level; solid; particles; melting; impurities; collect; surface; remain; rod; molten alloy; earth elements; rare earth-iron; refractory material; solid particles; rare earth; inert gas; pressure differential; gas atmosphere; earth element; solid particle; earth-iron alloys; earth-iron alloy; chamber maintained; material positioned; forming magnet; iron alloys; iron alloy; magnetostrictive rods; /75/

Citation Formats


                    McMasters, O. Dale. Method of forming magnetostrictive rods from rare earth-iron alloys.  United States: N. p., 1986. 
        Web.

Copy to clipboard


                    McMasters, O. Dale. Method of forming magnetostrictive rods from rare earth-iron alloys.  United States.

Copy to clipboard


                    McMasters, O. Dale. Tue .  
        "Method of forming magnetostrictive rods from rare earth-iron alloys".  United States.  https://www.osti.gov/servlets/purl/865970.

Copy to clipboard


                    
@article{osti_865970,

  title        = {Method of forming magnetostrictive rods from rare earth-iron alloys},

  author       = {McMasters, O. Dale},

  abstractNote = {Rods of magnetrostructive alloys of iron with rare earth elements are formed by flowing a body of rare earth-iron alloy in a crucible enclosed in a chamber maintained under an inert gas atmosphere, forcing such molten rare-earth-iron alloy into a hollow mold tube of refractory material positioned with its lower end portion within the molten body by means of a pressure differential between the chamber and mold tube and maintaining a portion of the molten alloy in the crucible extending to a level above the lower end of the mold tube so that solid particles of higher melting impurities present in the alloy collect at the surface of the molten body and remain within the crucible as the rod is formed in the mold tube.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1986},

  month        = {9}

}

Copy to clipboard

Patent:

View Patent

Save / Share:

Export Metadata

Save to My Library

Similar records in DOE Patents and OSTI.GOV collections:

Method of forming magnetostrictive rods from rare earth-iron alloys

Patent McMasters, O.D.

Rods of magnetostrictive alloys of iron with rare earth elements are formed by flowing a body of rare earth-iron alloy in a crucible enclosed in a chamber maintained under an inert gas atmosphere, forcing such molten rare-earth-iron alloy into a hollow mold tube of refractory material positioned with its lower end portion within the molten body by means of a pressure differential between the chamber and mold tube and maintaining a portion of the molten alloy in the crucible extending to a level above the lower end of the mold tube so that solid particles of higher melting impurities presentmore »« less
Method of increasing magnetostrictive response of rare earth-iron alloy rods

Patent Verhoeven, John D. (Ames, IA); McMasters, O. Dale (Ames, IA); Gibson, Edwin D. (Ames, IA); ...

This invention comprises a method of increasing the magnetostrictive response of rare earth-iron (RFe) magnetostrictive alloy rods by a thermal-magnetic treatment. The rod is heated to a temperature above its Curie temperature, viz. from 400.degree. to 600.degree. C.; and, while the rod is at that temperature, a magnetic field is directionally applied and maintained while the rod is cooled, at least below its Curie temperature.
Full Text Available
Thermal treatment for increasing magnetostrictive response of rare earth-iron alloy rods

Patent Verhoeven, John D. (Ames, IA); McMasters, O. D. (Ames, IA)

Magnetostrictive rods formed from rare earth-iron alloys are subjected to a short time heat treatment to increase their Magnetostrictive response under compression. The heat treatment is preferably carried out at a temperature of from 900.degree. to 1000.degree. C. for 20 minutes to six hours.
Full Text Available
Sintered rare earth-iron Laves phase magnetostrictive alloy product and preparation thereof

Patent Malekzadeh, Manoochehr (Oakland, CA); Pickus, Milton R. (Oakland, CA)

A sintered rare earth-iron Laves phase magnetostrictive alloy product characterized by a grain oriented morphology. The grain oriented morphology is obtained by magnetically aligning powder particles of the magnetostrictive alloy prior to sintering. Specifically disclosed are grain oriented sintered compacts of Tb.sub.x Dy.sub.1-x Fe.sub.2 and their method of preparation. The present sintered products have enhanced magnetostrictive properties.
Full Text Available
Rare earth-iron magnetostrictive materials and devices using these materials

Patent Savage, Howard T. (Greenbelt, MD); Clark, Arthur E. (Adelphi, MD); McMasters, O. Dale (Ames, IA)

Grain-oriented polycrystalline or single crystal magnetostrictive materials n the general formula Tb.sub.x Dy.sub.1-x Fe.sub.2-w, Tb.sub.x Ho.sub.1-x Fe.sub.2-w, Sm.sub.x Dy.sub.1-x Fe.sub.x-w, Sm.sub.x Ho.sub.1-x Fe.sub.2-w, Tb.sub.x Ho.sub.y Dy.sub.z Fe.sub.2-w, or Sm.sub.x Ho.sub.y Dy.sub.z Fe.sub.2-w, wherein O.ltoreq.w.ltoreq.0.20, and x+y+z=1. X, y, and z are selected to maximize the magnetostrictive effect and the magnetomechanical coupling coefficient K.sub.33. These material may be used in magnetostrictive transducers, delay lines, variable frequency resonators, and filters.
Full Text Available

Similar Records